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Full vulnerability report · 2026
CVE-2026-28388High confidence

NULL Pointer Dereference When Processing a Delta CRL

OpenSSL · OpenSSL

7.5HighCVSS 3.1
Recommended action
Patch only the product branches with a verified fix

High technical severity; prioritise exposed affected systems while verifying vendor guidance. Verified remediation exists for at least one product or source, but 2 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Fix availability varies by product
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityHighOperational priority:High, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • The selected CVSS metric records a network-reachable, unauthenticated path with no user interaction.
  • EPSS is 2.50% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict the affected network interface to trusted sources where business-safe.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs OpenSSL OpenSSL and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: Within 30 daysRemediation target: Within 180 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Cross-source reconciliation

Remediation availability differs by product scope

Verified remediation exists for at least one product or source, but 2 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Distribution package intelligence

Release-specific package status

Alpine, Debian, ubuntu findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.

9 package states
Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Distribution releaseSource packageVendor stateFixed versionEvidence
Alpine v3.23v3.23 · mainopensslVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.3.5.6-r0Alpine Security Database ↗Source updated 3 Oct 2026
Alpine v3.22v3.22 · mainopensslVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.3.5.6-r0Alpine Security Database ↗Source updated 3 Oct 2026
Alpine v3.21v3.21 · mainopensslVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.3.3.7-r0Alpine Security Database ↗Source updated 3 Oct 2026
Debian trixietrixie · sourceopensslVendor fix publishedDebian records a fixed source-package version for this release.3.5.5-1~deb13u2Debian Security Tracker ↗Source updated 5 Oct 2026
Debian bookwormbookworm · sourceopensslVendor fix publishedDebian records a fixed source-package version for this release.3.0.19-1~deb12u2Debian Security Tracker ↗Source updated 5 Oct 2026
Debian forkyforky · sourceopensslVendor fix publishedDebian records a fixed source-package version for this release.3.6.2-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian sidsid · sourceopensslVendor fix publishedDebian records a fixed source-package version for this release.3.6.2-1Debian Security Tracker ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archiveedk2Under evaluationCanonical reports that the package might be affected and still needs evaluation or fixing.Not published in this feedCanonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archiveopensslVendor fix publishedCanonical reports that a fixed source package version has been published. Repository candidate availability is not checked by BlackTree.3.0.13-0ubuntu3.9Canonical Ubuntu Security ↗Source updated 5 Oct 2026
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

3 current
CVE-2026-28388 · CSAF 2.0 · revision 3 · finalRed Hat Product Securityopenssl: OpenSSL: Denial of Service due to NULL pointer dereference in delta CRL processing
70 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • edk2-aarch64 as a component of Red Hat Enterprise Linux 10
  • edk2-ovmf as a component of Red Hat Enterprise Linux 10
  • edk2-tools as a component of Red Hat Enterprise Linux 10
  • edk2-tools-doc as a component of Red Hat Enterprise Linux 10
  • edk2.src as a component of Red Hat Enterprise Linux 10
  • mokutil as a component of Red Hat Enterprise Linux 10
  • openssl as a component of Red Hat Enterprise Linux 10
  • openssl-devel as a component of Red Hat Enterprise Linux 10
  • openssl-libs as a component of Red Hat Enterprise Linux 10
  • openssl-perl as a component of Red Hat Enterprise Linux 10
  • openssl.src as a component of Red Hat Enterprise Linux 10
  • shim-aa64 as a component of Red Hat Enterprise Linux 10
Summary
A flaw was found in OpenSSL. When processing a malformed delta Certificate Revocation List (CRL) that lacks a required CRL Number extension, a NULL pointer dereference can occur. This vulnerability can be exploited by a remote attacker who provides a specially crafted delta CRL to an application that has delta CRL processing enabled, leading to a Denial of Service (DoS) for the application.
Remediation
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/
SSA-032379 · CSAF 2.0 · revision 1 · interimSiemens ProductCERTSSA-032379: Multiple Vulnerabilities in SIMATIC CN 4100 Before V5.0
1 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • SIMATIC CN 4100
Summary
Issue summary: When a delta CRL that contains a Delta CRL Indicator extension is processed a NULL pointer dereference might happen if the required CRL Number extension is missing. Impact summary: A NULL pointer dereference can trigger a crash which leads to a Denial of Service for an application. When CRL processing and delta CRL processing is enabled during X.509 certificate verification, the delta CRL processing does not check whether the CRL Number extension is NULL before dereferencing it. When a malformed delta CRL file is being processed, this parameter can be NULL, causing a NULL pointer dereference. Exploiting this issue requires the X509_V_FLAG_USE_DELTAS flag to be enabled in the verification context, the certificate being verified to contain a freshestCRL extension or the base CRL to have the EXFLAG_FRESHEST flag set, and an attacker to provide a malformed CRL to an application that processes it. The vulnerability is limited to Denial of Service and cannot be escalated to achieve code execution or memory disclosure. For that reason the issue was assessed as Low severity according to our Security Policy. The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the affected code is outside the OpenSSL FIPS module boundary.
Remediation
Update to V5.0 or later version
SSA-265688 · CSAF 2.0 · revision 13 · interimSiemens ProductCERTSSA-265688: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 TM MFP V1.1
1 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Summary
Issue summary: When a delta CRL that contains a Delta CRL Indicator extension is processed a NULL pointer dereference might happen if the required CRL Number extension is missing. Impact summary: A NULL pointer dereference can trigger a crash which leads to a Denial of Service for an application. When CRL processing and delta CRL processing is enabled during X.509 certificate verification, the delta CRL processing does not check whether the CRL Number extension is NULL before dereferencing it. When a malformed delta CRL file is being processed, this parameter can be NULL, causing a NULL pointer dereference. Exploiting this issue requires the X509_V_FLAG_USE_DELTAS flag to be enabled in the verification context, the certificate being verified to contain a freshestCRL extension or the base CRL to have the EXFLAG_FRESHEST flag set, and an attacker to provide a malformed CRL to an application that processes it. The vulnerability is limited to Denial of Service and cannot be escalated to achieve code execution or memory disclosure. For that reason the issue was assessed as Low severity according to our Security Policy. The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the affected code is outside the OpenSSL FIPS module boundary.
Remediation
Limit access to the interactive shell of the additional GNU/Linux subssytem to trusted personnel only.
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2026-19962

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionPatch only the product branches with a verified fix

High technical severity; prioritise exposed affected systems while verifying vendor guidance. Verified remediation exists for at least one product or source, but 2 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Fix availability varies by product
01

What, why and how

Issue summary: When a delta CRL that contains a Delta CRL Indicator extension is processed a NULL pointer dereference might happen if the required CRL Number extension is missing. Impact summary: A NULL pointer dereference can trigger a crash which leads to a Denial of Service for an application. When CRL processing and delta CRL processing is enabled during X.509 certificate verification, the delta CRL processing does not check whether the CRL Number extension is NULL before dereferencing it. When a malformed delta CRL file is being processed, this parameter can be NULL, causing a NULL pointer dereference. Exploiting this issue requires the X509_V_FLAG_USE_DELTAS flag to be enabled in the verification context, the certificate being verified to contain a freshestCRL extension or the base CRL to have the EXFLAG_FRESHEST flag set, and an attacker to provide a malformed CRL to an application that processes it. The vulnerability is limited to Denial of Service and cannot be escalated to achieve code execution or memory disclosure. For that reason the issue was assessed as Low severity according to our Security Policy. The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the affected code is outside the OpenSSL FIPS module boundary.

What

Issue summary: When a delta CRL that contains a Delta CRL Indicator extension is processed a NULL pointer dereference might happen if the required CRL Number extension is missing. Impact summary: A NULL pointer dereference can trigger a crash which leads to a Denial of Service for an application. When CRL processing and delta CRL processing is enabled during X.509 certificate verification, the delta CRL processing does not check whether the CRL Number extension is NULL before dereferencing it. When a malformed delta CRL file is being processed, this parameter can be NULL, causing a NULL pointer dereference. Exploiting this issue requires the X509_V_FLAG_USE_DELTAS flag to be enabled in the verification context, the certificate being verified to contain a freshestCRL extension or the base CRL to have the EXFLAG_FRESHEST flag set, and an attacker to provide a malformed CRL to an application that processes it. The vulnerability is limited to Denial of Service and cannot be escalated to achieve code execution or memory disclosure. For that reason the issue was assessed as Low severity according to our Security Policy. The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the affected code is outside the OpenSSL FIPS module boundary.

Why

The product dereferences a pointer that it expects to be valid but is NULL.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

What

Issue summary: When a delta CRL that contains a Delta CRL Indicator extension is processed a NULL pointer dereference might happen if the required CRL Number extension is missing. Impact summary: A NULL pointer dereference can trigger a crash which leads to a Denial of Service for an application. When CRL processing and delta CRL processing is enabled during X.509 certificate verification, the delta CRL processing does not check whether the CRL Number extension is NULL before dereferencing it. When a malformed delta CRL file is being processed, this parameter can be NULL, causing a NULL pointer dereference. Exploiting this issue requires the X509_V_FLAG_USE_DELTAS flag to be enabled in the verification context, the certificate being verified to contain a freshestCRL extension or the base CRL to have the EXFLAG_FRESHEST flag set, and an attacker to provide a malformed CRL to an application that processes it. The vulnerability is limited to Denial of Service and cannot be escalated to achieve code execution or memory disclosure. For that reason the issue was assessed as Low severity according to our Security Policy. The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the affected code is outside the OpenSSL FIPS module boundary.

Why

The product dereferences a pointer that it expects to be valid but is NULL.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → NULL Pointer Dereference → disrupt the affected service
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-476 ↗

CWE-476: NULL Pointer Dereference. The product dereferences a pointer that it expects to be valid but is NULL.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedDenial of serviceCWE-476
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-2026-3167Hitachi Energy RTU500: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Hitachi Energy RTU500 ausnutzen um Denial-of-Service-Zustände durch Anwendungsabstürze zu verursachen, Cookies oder Authentifizierungsinformationen an unbeabsichtigte Gegenstellen offenzulegen oder vorgesehene Authentifizierungskonfigurationen zu umgehen.

Official advisory ↗
BSI · German · WID-SEC-2026-0995OpenSSL: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in OpenSSL ausnutzen, um einen Denial of Service Angriff durchzuführen, vertrauliche Informationen offenzulegen oder andere, nicht näher spezifizierte Angriffe durchzuführen.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-1056Multiples vulnérabilités dans les produits Splunk

ord?id=CVE-2026-27143 Référence CVE CVE-2026-27144 https://www.cve.org/CVERecord?id=CVE-2026-27144 Référence CVE CVE-2026-27199 https://www.cve.org/CVERecord?id=CVE-2026-27199 Référence CVE CVE-2026-2739 https://www.cve.org/CVERecord?id=CVE-2026-2739 Référence CVE CVE-2026-27651 https://www.cve.org/CVERecord?id=CVE-2026-27651 Référence CVE CVE-2026-27654 https://www.cve.org/CVERecord?id=CVE-2026-27654 Référence CVE CVE-2026-27784 https://www.cve.org/CVERecord?id=CVE-2026-27784 Référence CVE CVE-2026-27959 https://www.cve.org/CVERecord?id=CVE-2026-27959 Référence CVE CVE-2026-28277 https://www.cve.org/CVERecord?id=CVE-2026-28277 Référence CVE CVE-2026-28388 https://www.cve.org/CVERecord?id=CVE-2026-28388 Référence CVE CVE-2026-28389 https://www.cve.org/CVERecord?id=CVE-2026-28389 Référence CVE CVE-2026-28390 https://www.cve.org/CVERecord?id=CVE-2026-28390 Référence CVE CVE-2026-28684 https://www.cve.org/CVERecord?id=CVE-2026-28684 Référence CVE CVE-2026-28753 https://www.cve.org/CVERecord?id=CVE-2026-28753 Référence CVE CVE-2026-28755 https://www.cve.org/CVERecord?id=CVE-2026-28755 Référence CVE CVE-2026-29063 https://www.cve.org/CVERecord?id=CVE-2026-29063 Référence CVE CVE-2026-29181 https://www.cve.org/CVERecord?id=CVE-2026-29181 Référence CVE CVE-2026-2950 https://www.cve.org/CVERecord?id=C

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0914Multiples vulnérabilités dans Oracle Database Server

bilités ont été découvertes dans Oracle Database Server. Elles permettent à un attaquant de provoquer un déni de service à distance, une atteinte à la confidentialité des données et une atteinte à l'intégrité des données. Solutions Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation). Documentation Bulletin de sécurité Oracle Database Server cpujul2026 du 21 juillet 2026 https://www.oracle.com/security-alerts/cpujul2026.html Référence CVE CVE-2025-7962 https://www.cve.org/CVERecord?id=CVE-2025-7962 Référence CVE CVE-2026-28387 https://www.cve.org/CVERecord?id=CVE-2026-28387 Référence CVE CVE-2026-28388 https://www.cve.org/CVERecord?id=CVE-2026-28388 Référence CVE CVE-2026-28389 https://www.cve.org/CVERecord?id=CVE-2026-28389 Référence CVE CVE-2026-28390 https://www.cve.org/CVERecord?id=CVE-2026-28390 Référence CVE CVE-2026-31789 https://www.cve.org/CVERecord?id=CVE-2026-31789 Référence CVE CVE-2026-31790 https://www.cve.org/CVERecord?id=CVE-2026-31790 Référence CVE CVE-2026-34180 https://www.cve.org/CVERecord?id=CVE-2026-34180 Référence CVE CVE-2026-34181 https://www.cve.org/CVERecord?id=CVE-2026-34181 Référence CVE CVE-2026-34182 https://www.cve.org/CVERecord?id=CVE-2026-34182 Référence CVE CVE-2026-34183 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0888Multiples vulnérabilités dans les produits Splunk

d?id=CVE-2025-47913 Référence CVE CVE-2025-61726 https://www.cve.org/CVERecord?id=CVE-2025-61726 Référence CVE CVE-2026-20296 https://www.cve.org/CVERecord?id=CVE-2026-20296 Référence CVE CVE-2026-20297 https://www.cve.org/CVERecord?id=CVE-2026-20297 Référence CVE CVE-2026-20298 https://www.cve.org/CVERecord?id=CVE-2026-20298 Référence CVE CVE-2026-24051 https://www.cve.org/CVERecord?id=CVE-2026-24051 Référence CVE CVE-2026-27140 https://www.cve.org/CVERecord?id=CVE-2026-27140 Référence CVE CVE-2026-27143 https://www.cve.org/CVERecord?id=CVE-2026-27143 Référence CVE CVE-2026-27144 https://www.cve.org/CVERecord?id=CVE-2026-27144 Référence CVE CVE-2026-28388 https://www.cve.org/CVERecord?id=CVE-2026-28388 Référence CVE CVE-2026-28389 https://www.cve.org/CVERecord?id=CVE-2026-28389 Référence CVE CVE-2026-28390 https://www.cve.org/CVERecord?id=CVE-2026-28390 Référence CVE CVE-2026-29181 https://www.cve.org/CVERecord?id=CVE-2026-29181 Référence CVE CVE-2026-32280 https://www.cve.org/CVERecord?id=CVE-2026-32280 Référence CVE CVE-2026-32281 https://www.cve.org/CVERecord?id=CVE-2026-32281 Référence CVE CVE-2026-32283 https://www.cve.org/CVERecord?id=CVE-2026-32283 Référence CVE CVE-2026-32285 https://www.cve.org/CVERecord?id=CVE-2026-32285 Référence CVE CVE-2026-32287 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0796Multiples vulnérabilités dans Tenable Identity Exposure

ord?id=CVE-2026-21716 Référence CVE CVE-2026-21717 https://www.cve.org/CVERecord?id=CVE-2026-21717 Référence CVE CVE-2026-22795 https://www.cve.org/CVERecord?id=CVE-2026-22795 Référence CVE CVE-2026-22796 https://www.cve.org/CVERecord?id=CVE-2026-22796 Référence CVE CVE-2026-26130 https://www.cve.org/CVERecord?id=CVE-2026-26130 Référence CVE CVE-2026-26171 https://www.cve.org/CVERecord?id=CVE-2026-26171 Référence CVE CVE-2026-2673 https://www.cve.org/CVERecord?id=CVE-2026-2673 Référence CVE CVE-2026-28386 https://www.cve.org/CVERecord?id=CVE-2026-28386 Référence CVE CVE-2026-28387 https://www.cve.org/CVERecord?id=CVE-2026-28387 Référence CVE CVE-2026-28388 https://www.cve.org/CVERecord?id=CVE-2026-28388 Référence CVE CVE-2026-28389 https://www.cve.org/CVERecord?id=CVE-2026-28389 Référence CVE CVE-2026-28390 https://www.cve.org/CVERecord?id=CVE-2026-28390 Référence CVE CVE-2026-31789 https://www.cve.org/CVERecord?id=CVE-2026-31789 Référence CVE CVE-2026-31790 https://www.cve.org/CVERecord?id=CVE-2026-31790 Référence CVE CVE-2026-32167 https://www.cve.org/CVERecord?id=CVE-2026-32167 Référence CVE CVE-2026-32175 https://www.cve.org/CVERecord?id=CVE-2026-32175 Référence CVE CVE-2026-32176 https://www.cve.org/CVERecord?id=CVE-2026-32176 Référence CVE CVE-2026-32177 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0627Multiples vulnérabilités dans les produits Splunk

d?id=CVE-2026-27143 Référence CVE CVE-2026-27144 https://www.cve.org/CVERecord?id=CVE-2026-27144 Référence CVE CVE-2026-27171 https://www.cve.org/CVERecord?id=CVE-2026-27171 Référence CVE CVE-2026-27456 https://www.cve.org/CVERecord?id=CVE-2026-27456 Référence CVE CVE-2026-27628 https://www.cve.org/CVERecord?id=CVE-2026-27628 Référence CVE CVE-2026-27699 https://www.cve.org/CVERecord?id=CVE-2026-27699 Référence CVE CVE-2026-27888 https://www.cve.org/CVERecord?id=CVE-2026-27888 Référence CVE CVE-2026-28351 https://www.cve.org/CVERecord?id=CVE-2026-28351 Référence CVE CVE-2026-28387 https://www.cve.org/CVERecord?id=CVE-2026-28387 Référence CVE CVE-2026-28388 https://www.cve.org/CVERecord?id=CVE-2026-28388 Référence CVE CVE-2026-28389 https://www.cve.org/CVERecord?id=CVE-2026-28389 Référence CVE CVE-2026-28390 https://www.cve.org/CVERecord?id=CVE-2026-28390 Référence CVE CVE-2026-28804 https://www.cve.org/CVERecord?id=CVE-2026-28804 Référence CVE CVE-2026-3061 https://www.cve.org/CVERecord?id=CVE-2026-3061 Référence CVE CVE-2026-3062 https://www.cve.org/CVERecord?id=CVE-2026-3062 Référence CVE CVE-2026-3063 https://www.cve.org/CVERecord?id=CVE-2026-3063 Référence CVE CVE-2026-31789 https://www.cve.org/CVERecord?id=CVE-2026-31789 Référence CVE CVE-2026-31790 https://www.cve.org/CVERecord?id=CVE-20

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0565Multiples vulnérabilités dans les produits Siemens

ord?id=CVE-2026-21947 Référence CVE CVE-2026-22924 https://www.cve.org/CVERecord?id=CVE-2026-22924 Référence CVE CVE-2026-22925 https://www.cve.org/CVERecord?id=CVE-2026-22925 Référence CVE CVE-2026-25786 https://www.cve.org/CVERecord?id=CVE-2026-25786 Référence CVE CVE-2026-25787 https://www.cve.org/CVERecord?id=CVE-2026-25787 Référence CVE CVE-2026-25789 https://www.cve.org/CVERecord?id=CVE-2026-25789 Référence CVE CVE-2026-2673 https://www.cve.org/CVERecord?id=CVE-2026-2673 Référence CVE CVE-2026-27662 https://www.cve.org/CVERecord?id=CVE-2026-27662 Référence CVE CVE-2026-28387 https://www.cve.org/CVERecord?id=CVE-2026-28387 Référence CVE CVE-2026-28388 https://www.cve.org/CVERecord?id=CVE-2026-28388 Référence CVE CVE-2026-28389 https://www.cve.org/CVERecord?id=CVE-2026-28389 Référence CVE CVE-2026-28390 https://www.cve.org/CVERecord?id=CVE-2026-28390 Référence CVE CVE-2026-31789 https://www.cve.org/CVERecord?id=CVE-2026-31789 Référence CVE CVE-2026-31790 https://www.cve.org/CVERecord?id=CVE-2026-31790 Gestion détaillée du document le 12 mai 2026 Version initiale Alertes Avis Bulletins d’actualités Mentions légales Conditions générales À propos Contact cyber.gouv.fr service-public.fr legifrance.gouv.fr info.gouv.fr france.fr info.gouv.fr/risques Premier Ministre / Secrétariat Général de la

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0550Multiples vulnérabilités dans les produits IBM

d?id=CVE-2026-22018 Référence CVE CVE-2026-22021 https://www.cve.org/CVERecord?id=CVE-2026-22021 Référence CVE CVE-2026-22815 https://www.cve.org/CVERecord?id=CVE-2026-22815 Référence CVE CVE-2026-25547 https://www.cve.org/CVERecord?id=CVE-2026-25547 Référence CVE CVE-2026-25645 https://www.cve.org/CVERecord?id=CVE-2026-25645 Référence CVE CVE-2026-27124 https://www.cve.org/CVERecord?id=CVE-2026-27124 Référence CVE CVE-2026-27448 https://www.cve.org/CVERecord?id=CVE-2026-27448 Référence CVE CVE-2026-27459 https://www.cve.org/CVERecord?id=CVE-2026-27459 Référence CVE CVE-2026-28387 https://www.cve.org/CVERecord?id=CVE-2026-28387 Référence CVE CVE-2026-28388 https://www.cve.org/CVERecord?id=CVE-2026-28388 Référence CVE CVE-2026-28389 https://www.cve.org/CVERecord?id=CVE-2026-28389 Référence CVE CVE-2026-28390 https://www.cve.org/CVERecord?id=CVE-2026-28390 Référence CVE CVE-2026-28804 https://www.cve.org/CVERecord?id=CVE-2026-28804 Référence CVE CVE-2026-29063 https://www.cve.org/CVERecord?id=CVE-2026-29063 Référence CVE CVE-2026-2950 https://www.cve.org/CVERecord?id=CVE-2026-2950 Référence CVE CVE-2026-31789 https://www.cve.org/CVERecord?id=CVE-2026-31789 Référence CVE CVE-2026-31790 https://www.cve.org/CVERecord?id=CVE-2026-31790 Référence CVE CVE-2026-32871 https://www.cve.org/CVERecord?id=CV

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0428Multiples vulnérabilités dans les produits Microsoft

De multiples vulnérabilités ont été découvertes dans les produits Microsoft. Elles permettent à un attaquant de provoquer un problème de sécurité non spécifié par l'éditeur.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0403Multiples vulnérabilités dans OpenSSL

De multiples vulnérabilités ont été découvertes dans OpenSSL. Elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, un déni de service à distance et une atteinte à la confidentialité des données.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2026-010838OpenSSLにおける複数の脆弱性（OpenSSL Security Advisory [7th April 2026]）

OpenSSL Projectから OpenSSL Security Advisory [7th April 2026] が公開されました。 深刻度 - 中（Severity: Moderate） RSA KEM RSASVEカプセル化における不適切なエラー処理（CWE-754、CVE-2026-31790） RSA_public_encrypt()において、RSA暗号化が失敗した際の戻り値判定が不適切なため、失敗していても成功として扱ってしまい、結果として出力バッファが未初期化のまま送信される可能性がある 深刻度 - 低（Severity：Low） AES-CFB-128処理時の境界外読み取り（CWE-125、CVE-2026-28386） AVX-512およびVAESをサポートするシステム上でAES-CFB128による暗号化または復号を行う場合、暗号ブロックを処理する際に最大15バイトの境界外読み取りが発生する DANEクライアントコードにおける解放済みメモリ使用（use-after-free）（CWE-416、CVE-2026-28387） DANE検証処理において、TLSAレコードの組み合わせにより解放済みメモリ使用（use-after-free）または二重解放（double free）が発生する Delta CRL処理時のNULLポインタ参照（CWE-476、CVE-2026-28388） Delta CRL Indicator拡張を含むDelta CRLを処理する際に、必須項目であるCRL Number拡張が欠落していると、NULLポインタ参照が発生する KeyAgreeRecipientInfo処理時のNULLポインタ参照（CWE-476、CVE-2026-28389） CMS EnvelopedDataメッセージを処理する際、KeyAgreeRecipientInfoの処理過程でKeyEncryptionAlgorithmIdentifierのフィールドが欠落しているとNULLポインタ参照が発生する CMS KeyTransportRecipientInfo処理時のNULLポインタ参照（CWE-476、CVE-2026-28390） CMS EnvelopedDataメッセージを処理する際、KeyTransportRecipientInfo処理過程でSourceFuncアルゴリズムのパラメータが欠落しているとNULLポインタ参照が発生する 16進数変換時におけるヒープベースのバッファオーバーフロー（CWE-787、CVE-2026-31789） 極端に大きなOCTET STRINGを16進文字列に変換する際、32bit環境においてヒープベースのバッファオーバーフローが発生する

Official advisory ↗
NCSC-NL · Dutch · NCSC-2026-0147Kwetsbaarheden verholpen in Siemens-producten

A NULL pointer dereference vulnerability in OpenSSL's delta CRL processing can cause application crashes and Denial of Service, with exploitation requiring specific conditions and assessed as low severity.

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Fix availability varies by product
Affected
Fixed
Action
Use the product-specific evidence above. Patch only products with a verified fixed release, and keep every affected or under-investigation state without a matching fix in the remediation queue.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 7 Apr 2026 · Last source change 12 May 2026, 12:08 UTC · CWE-476 · NULL Pointer Dereference

CVE recordCVE.org · 5.2
CVSS sourceNIST NVD
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2026-19962
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Affected versionsThe structured affected or fixed version information changed.
    Before
    3.6.0 < 3.6.2; 3.5.0 < 3.5.6; 3.4.0 < 3.4.5; 3.3.0 < 3.3.7; 3.0.0 < 3.0.20; 1.1.1 < 1.1.1zg; 1.0.2 < 1.0.2zp · Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
    After
    3.6.0 < 3.6.2; 3.5.0 < 3.5.6; 3.4.0 < 3.4.5; 3.3.0 < 3.3.7; 3.0.0 < 3.0.20; 1.1.1 < 1.1.1zg; 1.0.2 < 1.0.2zp · Fixed: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/
    Red Hat Product Security ↗
  2. Affected versionsThe structured affected or fixed version information changed.
    Before
    edk2-aarch64 as a component of Red Hat Enterprise Linux 10; edk2-ovmf as a component of Red Hat Enterprise Linux 10; edk2-tools as a component of Red Hat Enterprise Linux 10; edk2-tools-doc as a component of Red Hat Enterprise Linux 10; edk2.src as a component of Red Hat Enterprise Linux 10; mokutil as a component of Red Hat Enterprise Linux 10; openssl as a component of Red Hat Enterprise Linux 10; openssl-devel as a component of Red Hat Enterprise Linux 10; openssl-libs as a component of Red Hat Enterprise Linux 10; openssl-perl as a component of Red Hat Enterprise Linux 10; openssl.src as a component of Red Hat Enterprise Linux 10; shim-aa64 as a component of Red Hat Enterprise Linux 10; shim-unsigned-aarch64.src as a component of Red Hat Enterprise Linux 10; shim-unsigned-x64.src as a component of Red Hat Enterprise Linux 10; shim-x64 as a component of Red Hat Enterprise Linux 10; openssl as a component of Red Hat Enterprise Linux 6; openssl-devel as a component of Red Hat Enterprise Linux 6; openssl-perl as a component of Red Hat Enterprise Linux 6; openssl-static as a component of Red Hat Enterprise Linux 6; openssl.src as a component of Red Hat Enterprise Linux 6; AAVMF as a component of Red Hat Enterprise Linux 7; OVMF as a component of Red Hat Enterprise Linux 7; openssl as a component of Red Hat Enterprise Linux 7; openssl-devel as a component of Red Hat Enterprise Linux 7; openssl-libs as a component of Red Hat Enterprise Linux 7; openssl-perl as a component of Red Hat Enterprise Linux 7; openssl-static as a component of Red Hat Enterprise Linux 7; openssl.src as a component of Red Hat Enterprise Linux 7; ovmf.src as a component of Red Hat Enterprise Linux 7; compat-openssl10 as a component of Red Hat Enterprise Linux 8; and 39 more · Fixed: openssl-main@aarch64 as a component of Red Hat Hardened Images; openssl-main@src as a component of Red Hat Hardened Images; openssl-main@x86_64 as a component of Red Hat Hardened Images
    After
    edk2-aarch64 as a component of Red Hat Enterprise Linux 10; edk2-ovmf as a component of Red Hat Enterprise Linux 10; edk2-tools as a component of Red Hat Enterprise Linux 10; edk2-tools-doc as a component of Red Hat Enterprise Linux 10; edk2.src as a component of Red Hat Enterprise Linux 10; mokutil as a component of Red Hat Enterprise Linux 10; openssl as a component of Red Hat Enterprise Linux 10; openssl-devel as a component of Red Hat Enterprise Linux 10; openssl-libs as a component of Red Hat Enterprise Linux 10; openssl-perl as a component of Red Hat Enterprise Linux 10; openssl.src as a component of Red Hat Enterprise Linux 10; shim-aa64 as a component of Red Hat Enterprise Linux 10; shim-unsigned-aarch64.src as a component of Red Hat Enterprise Linux 10; shim-unsigned-x64.src as a component of Red Hat Enterprise Linux 10; shim-x64 as a component of Red Hat Enterprise Linux 10; openssl as a component of Red Hat Enterprise Linux 6; openssl-devel as a component of Red Hat Enterprise Linux 6; openssl-perl as a component of Red Hat Enterprise Linux 6; openssl-static as a component of Red Hat Enterprise Linux 6; openssl.src as a component of Red Hat Enterprise Linux 6; AAVMF as a component of Red Hat Enterprise Linux 7; OVMF as a component of Red Hat Enterprise Linux 7; openssl as a component of Red Hat Enterprise Linux 7; openssl-devel as a component of Red Hat Enterprise Linux 7; openssl-libs as a component of Red Hat Enterprise Linux 7; openssl-perl as a component of Red Hat Enterprise Linux 7; openssl-static as a component of Red Hat Enterprise Linux 7; openssl.src as a component of Red Hat Enterprise Linux 7; ovmf.src as a component of Red Hat Enterprise Linux 7; compat-openssl10 as a component of Red Hat Enterprise Linux 8; and 40 more · Fixed: openssl-main@aarch64 as a component of Red Hat Hardened Images; openssl-main@src as a component of Red Hat Hardened Images; openssl-main@x86_64 as a component of Red Hat Hardened Images
    Red Hat Product Security ↗
  3. Affected versionsThe structured affected or fixed version information changed.
    Before
    edk2-aarch64 as a component of Red Hat Enterprise Linux 10; edk2-ovmf as a component of Red Hat Enterprise Linux 10; edk2-tools as a component of Red Hat Enterprise Linux 10; edk2-tools-doc as a component of Red Hat Enterprise Linux 10; edk2.src as a component of Red Hat Enterprise Linux 10; mokutil as a component of Red Hat Enterprise Linux 10; openssl as a component of Red Hat Enterprise Linux 10; openssl-devel as a component of Red Hat Enterprise Linux 10; openssl-libs as a component of Red Hat Enterprise Linux 10; openssl-perl as a component of Red Hat Enterprise Linux 10; openssl.src as a component of Red Hat Enterprise Linux 10; shim-aa64 as a component of Red Hat Enterprise Linux 10; shim-unsigned-aarch64.src as a component of Red Hat Enterprise Linux 10; shim-unsigned-x64.src as a component of Red Hat Enterprise Linux 10; shim-x64 as a component of Red Hat Enterprise Linux 10; openssl as a component of Red Hat Enterprise Linux 6; openssl-devel as a component of Red Hat Enterprise Linux 6; openssl-perl as a component of Red Hat Enterprise Linux 6; openssl-static as a component of Red Hat Enterprise Linux 6; openssl.src as a component of Red Hat Enterprise Linux 6; AAVMF as a component of Red Hat Enterprise Linux 7; OVMF as a component of Red Hat Enterprise Linux 7; openssl as a component of Red Hat Enterprise Linux 7; openssl-devel as a component of Red Hat Enterprise Linux 7; openssl-libs as a component of Red Hat Enterprise Linux 7; openssl-perl as a component of Red Hat Enterprise Linux 7; openssl-static as a component of Red Hat Enterprise Linux 7; openssl.src as a component of Red Hat Enterprise Linux 7; ovmf.src as a component of Red Hat Enterprise Linux 7; compat-openssl10 as a component of Red Hat Enterprise Linux 8; and 38 more · Fixed: openssl-main@aarch64 as a component of Red Hat Hardened Images; openssl-main@src as a component of Red Hat Hardened Images; openssl-main@x86_64 as a component of Red Hat Hardened Images
    After
    edk2-aarch64 as a component of Red Hat Enterprise Linux 10; edk2-ovmf as a component of Red Hat Enterprise Linux 10; edk2-tools as a component of Red Hat Enterprise Linux 10; edk2-tools-doc as a component of Red Hat Enterprise Linux 10; edk2.src as a component of Red Hat Enterprise Linux 10; mokutil as a component of Red Hat Enterprise Linux 10; openssl as a component of Red Hat Enterprise Linux 10; openssl-devel as a component of Red Hat Enterprise Linux 10; openssl-libs as a component of Red Hat Enterprise Linux 10; openssl-perl as a component of Red Hat Enterprise Linux 10; openssl.src as a component of Red Hat Enterprise Linux 10; shim-aa64 as a component of Red Hat Enterprise Linux 10; shim-unsigned-aarch64.src as a component of Red Hat Enterprise Linux 10; shim-unsigned-x64.src as a component of Red Hat Enterprise Linux 10; shim-x64 as a component of Red Hat Enterprise Linux 10; openssl as a component of Red Hat Enterprise Linux 6; openssl-devel as a component of Red Hat Enterprise Linux 6; openssl-perl as a component of Red Hat Enterprise Linux 6; openssl-static as a component of Red Hat Enterprise Linux 6; openssl.src as a component of Red Hat Enterprise Linux 6; AAVMF as a component of Red Hat Enterprise Linux 7; OVMF as a component of Red Hat Enterprise Linux 7; openssl as a component of Red Hat Enterprise Linux 7; openssl-devel as a component of Red Hat Enterprise Linux 7; openssl-libs as a component of Red Hat Enterprise Linux 7; openssl-perl as a component of Red Hat Enterprise Linux 7; openssl-static as a component of Red Hat Enterprise Linux 7; openssl.src as a component of Red Hat Enterprise Linux 7; ovmf.src as a component of Red Hat Enterprise Linux 7; compat-openssl10 as a component of Red Hat Enterprise Linux 8; and 39 more · Fixed: openssl-main@aarch64 as a component of Red Hat Hardened Images; openssl-main@src as a component of Red Hat Hardened Images; openssl-main@x86_64 as a component of Red Hat Hardened Images
    Red Hat Product Security ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
Fixed release recorded from official guidance
ENISA EUVD · EUVD-2026-19962↗Red Hat Product Security security advisory↗CVE authority or vendor reference↗Patch or update reference↗Patch or update reference↗Patch or update reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2026-28388 · cve.blacktree.nl