BlackTreeCVE Intelligence
← Back to the CVE catalogue
Full vulnerability report · 2026
CVE-2026-42771High confidence

Possible Out of Bounds Read in X509_VERIFY_PARAM_set1_email()

OpenSSL · OpenSSL

6.2MediumCVSS 3.1
Recommended action
Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityMediumOperational priority:Medium, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • EPSS is 0.16% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict local access and enforce least privilege on affected hosts.
  • 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: As exposure requiresRemediation target: Within 365 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.

Distribution package intelligence

Release-specific package status

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

4 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
Debian trixietrixie · sourceopensslNot affectedDebian marks this release not affected (fixed-version marker 0).Not published in this feedDebian Security Tracker ↗Source updated 7 Oct 2026
Debian bookwormbookworm · sourceopensslNot affectedDebian marks this release not affected (fixed-version marker 0).Not published in this feedDebian Security Tracker ↗Source updated 7 Oct 2026
Debian forkyforky · sourceopensslNot affectedDebian marks this release not affected (fixed-version marker 0).Not published in this feedDebian Security Tracker ↗Source updated 7 Oct 2026
Debian sidsid · sourceopensslNot affectedDebian marks this release not affected (fixed-version marker 0).Not published in this feedDebian Security Tracker ↗Source updated 7 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.

1 current
CVE-2026-42771 · CSAF 2.0 · revision 3 · finalRed Hat Product Securityopenssl: Possible Out of Bounds Read in X509_VERIFY_PARAM_set1_email()
58 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 an application uses the X509_VERIFY_PARAM_set1_email() function to validate a specially crafted S/MIME (Secure/Multipurpose Internet Mail Extensions) email address, an out-of-bounds read can occur. A remote attacker could exploit this vulnerability by sending a malicious email, leading to an application crash and a Denial of Service (DoS). This issue does not directly expose sensitive data.
Remediation
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/
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-2026-35488

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 actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
01

What, why and how

Issue summary: When the X509_VERIFY_PARAM_set1_email is called by an application to validate a crafted e-mail address, such as during S/MIME message validation, an out of bounds read can happen. Impact summary: This out of bounds read will not directly exfiltrate the data read to the attacker so the most likely result is a crash and a Denial of Service. An internal helper function called from X509_VERIFY_PARAM_[set|add]_email() used a wrong length when validating the local part of an email address. This could cause the 64 octet limit on the local part of an email address to be not enforced, or cause an out of bound read and potentially a crash. The bug is reachable via S-MIME validation with a crafted From: address supplied in an email message that can potentially cause a crash. No FIPS modules are affected by this issue as the affected code is outside the OpenSSL FIPS module boundary.

What

Issue summary: When the X509_VERIFY_PARAM_set1_email is called by an application to validate a crafted e-mail address, such as during S/MIME message validation, an out of bounds read can happen. Impact summary: This out of bounds read will not directly exfiltrate the data read to the attacker so the most likely result is a crash and a Denial of Service. An internal helper function called from X509_VERIFY_PARAM_[set|add]_email() used a wrong length when validating the local part of an email address. This could cause the 64 octet limit on the local part of an email address to be not enforced, or cause an out of bound read and potentially a crash. The bug is reachable via S-MIME validation with a crafted From: address supplied in an email message that can potentially cause a crash. No FIPS modules are affected by this issue as the affected code is outside the OpenSSL FIPS module boundary.

Why

The product reads data past the end, or before the beginning, of the intended buffer.

How

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

What

Issue summary: When the X509_VERIFY_PARAM_set1_email is called by an application to validate a crafted e-mail address, such as during S/MIME message validation, an out of bounds read can happen. Impact summary: This out of bounds read will not directly exfiltrate the data read to the attacker so the most likely result is a crash and a Denial of Service. An internal helper function called from X509_VERIFY_PARAM_[set|add]_email() used a wrong length when validating the local part of an email address. This could cause the 64 octet limit on the local part of an email address to be not enforced, or cause an out of bound read and potentially a crash. The bug is reachable via S-MIME validation with a crafted From: address supplied in an email message that can potentially cause a crash. No FIPS modules are affected by this issue as the affected code is outside the OpenSSL FIPS module boundary.

Why

The product reads data past the end, or before the beginning, of the intended buffer.

How

An attacker operating through local access 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
local access → Out-of-bounds Read → disrupt the affected service
Attack surface
Local
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-125 ↗

CWE-125: Out-of-bounds Read. The product reads data past the end, or before the beginning, of the intended buffer.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:L/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.

AVLocalAttack vector: The attacker needs local access to the vulnerable system.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
The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.
UnauthenticatedDenial of serviceCWE-125
A

Official authority intelligence

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

BSI · German · WID-SEC-2026-2919IBM App Connect Enterprise: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in IBM App Connect Enterprise ausnutzen, um beliebigen Programmcode auszuführen, um seine Privilegien zu erhöhen, um einen Denial of Service Angriff durchzuführen, um Informationen offenzulegen, um Dateien zu manipulieren, um einen Cross-Site Scripting Angriff durchzuführen, und um Sicherheitsvorkehrungen zu umgehen.

Official advisory ↗
BSI · German · WID-SEC-2026-2455Oracle Solaris Drittanbieterkomponenten: Mehrere Schwachstellen

Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in verschiedenen Komponenten von Drittanbietern in Oracle Solaris ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen.

Official advisory ↗
BSI · German · WID-SEC-2026-1852OpenSSL: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in OpenSSL ausnutzen, um beliebigen Programmcode auszuführen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, Daten zu manipulieren oder einen Denial-of-Service-Zustand zu verursachen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20260610Security Bulletin 10 Jun 2026

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 10 Jun 2026, published on 10 June 2026. Open the linked bulletin for the product, severity and reference information published in that issue.

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

rd?id=CVE-2026-3805 Référence CVE CVE-2026-40370 https://www.cve.org/CVERecord?id=CVE-2026-40370 Référence CVE CVE-2026-42764 https://www.cve.org/CVERecord?id=CVE-2026-42764 Référence CVE CVE-2026-42765 https://www.cve.org/CVERecord?id=CVE-2026-42765 Référence CVE CVE-2026-42766 https://www.cve.org/CVERecord?id=CVE-2026-42766 Référence CVE CVE-2026-42767 https://www.cve.org/CVERecord?id=CVE-2026-42767 Référence CVE CVE-2026-42768 https://www.cve.org/CVERecord?id=CVE-2026-42768 Référence CVE CVE-2026-42769 https://www.cve.org/CVERecord?id=CVE-2026-42769 Référence CVE CVE-2026-42770 https://www.cve.org/CVERecord?id=CVE-2026-42770 Référence CVE CVE-2026-42771 https://www.cve.org/CVERecord?id=CVE-2026-42771 Référence CVE CVE-2026-42789 https://www.cve.org/CVERecord?id=CVE-2026-42789 Référence CVE CVE-2026-42790 https://www.cve.org/CVERecord?id=CVE-2026-42790 Référence CVE CVE-2026-42899 https://www.cve.org/CVERecord?id=CVE-2026-42899 Référence CVE CVE-2026-45445 https://www.cve.org/CVERecord?id=CVE-2026-45445 Référence CVE CVE-2026-45446 https://www.cve.org/CVERecord?id=CVE-2026-45446 Référence CVE CVE-2026-45447 https://www.cve.org/CVERecord?id=CVE-2026-45447 Référence CVE CVE-2026-45490 https://www.cve.org/CVERecord?id=CVE-2026-45490 Référence CVE CVE-2026-45491 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0717Multiples vulnérabilités dans OpenSSL

De multiples vulnérabilités ont été découvertes dans OpenSSL. Certaines d'entre 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-2026-020156OpenSSL ProjectのOpenSSLにおける境界外読み取りに関する脆弱性

問題の概要: アプリケーションが S/MIME メッセージの検証時などに、X509_VERIFY_PARAM_set1_email を呼び出して細工されたメールアドレスを検証すると、範囲外読み取りが発生する可能性があります。影響の概要: この範囲外読み取りによって攻撃者にデータが直接漏洩することはありません。最も可能性の高い結果はクラッシュおよびサービス拒否（DoS）となります。X509_VERIFY_PARAM_[set|add]_email() から呼び出される内部の補助関数がメールアドレスのローカル部を検証する際に誤った長さを使用していました。これにより、ローカル部の64バイト制限が適用されなかったり、範囲外読み取りが発生してクラッシュを引き起こす可能性があります。このバグは細工された From: アドレスを含むメールメッセージを用いた S/MIME 検証を通じて到達可能であり、クラッシュを引き起こす可能性があります。この問題の影響を受けるコードは OpenSSL FIPS モジュールの境界外にあるため、FIPS モジュールには影響しません。

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.
Patch available
Affected
Fixed
Action
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 9 Jun 2026 · Last source change 10 Jun 2026, 07:48 UTC · CWE-125 · Out-of-bounds Read

CVE recordCVE.org · 5.2
CVSS sourceCISA ADP
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-2026-35488
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD enriched

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
    4.0.0 < 4.0.1 · 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
    4.0.0 < 4.0.1 · 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. Vendor guidanceAuthoritative vendor guidance changed from remediation: access.redhat.com/CVE-2026-42771 to remediation: access.redhat.com/CVE-2026-42771.
    Before
    remediation: access.redhat.com/CVE-2026-42771
    After
    remediation: access.redhat.com/CVE-2026-42771
    Red Hat Product Security ↗
  3. Remediation statusRemediation status changed from Mitigation available to Patch available.
    Before
    Mitigation available
    After
    Patch available
    Red Hat Product Security ↗
  4. 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; ovmf.src as a component of Red Hat Enterprise Linux 7; compat-openssl10 as a component of Red Hat Enterprise Linux 8; compat-openssl10.src as a component of Red Hat Enterprise Linux 8; edk2-aarch64 as a component of Red Hat Enterprise Linux 8; edk2-ovmf as a component of Red Hat Enterprise Linux 8; edk2.src as a component of Red Hat Enterprise Linux 8; mingw-openssl.src as a component of Red Hat Enterprise Linux 8; mingw32-openssl as a component of Red Hat Enterprise Linux 8; and 36 more
    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; ovmf.src as a component of Red Hat Enterprise Linux 7; compat-openssl10 as a component of Red Hat Enterprise Linux 8; compat-openssl10.src as a component of Red Hat Enterprise Linux 8; edk2-aarch64 as a component of Red Hat Enterprise Linux 8; edk2-ovmf as a component of Red Hat Enterprise Linux 8; edk2.src as a component of Red Hat Enterprise Linux 8; mingw-openssl.src as a component of Red Hat Enterprise Linux 8; mingw32-openssl as a component of Red Hat Enterprise Linux 8; and 28 more · Fixed: bootupd-0:0.3.2-1.hum1@aarch64 as a component of Red Hat Hardened Images; bootupd-0:0.3.2-1.hum1@x86_64 as a component of Red Hat Hardened Images; chunkah-0:0.6.0-3.hum1@aarch64 as a component of Red Hat Hardened Images; chunkah-0:0.6.0-3.hum1@src as a component of Red Hat Hardened Images; chunkah-0:0.6.0-3.hum1@x86_64 as a component of Red Hat Hardened Images; openssl-0:3.5.8-0.1.hum1@aarch64 as a component of Red Hat Hardened Images; openssl-0:3.5.8-0.1.hum1@src as a component of Red Hat Hardened Images; openssl-0:3.5.8-0.1.hum1@x86_64 as a component of Red Hat Hardened Images; openssl-config-fips-0:3.5.8-0.1.hum1@aarch64 as a component of Red Hat Hardened Images; openssl-config-fips-0:3.5.8-0.1.hum1@x86_64 as a component of Red Hat Hardened Images; openssl-devel-0:3.5.8-0.1.hum1@aarch64 as a component of Red Hat Hardened Images; openssl-devel-0:3.5.8-0.1.hum1@x86_64 as a component of Red Hat Hardened Images; openssl-devel-engine-0:3.5.8-0.1.hum1@aarch64 as a component of Red Hat Hardened Images; openssl-devel-engine-0:3.5.8-0.1.hum1@x86_64 as a component of Red Hat Hardened Images; openssl-fips-provider-upstream-0:3.5.8-0.1.hum1@aarch64 as a component of Red Hat Hardened Images; openssl-fips-provider-upstream-0:3.5.8-0.1.hum1@x86_64 as a component of Red Hat Hardened Images; openssl-libs-0:3.5.8-0.1.hum1@aarch64 as a component of Red Hat Hardened Images; openssl-libs-0:3.5.8-0.1.hum1@x86_64 as a component of Red Hat Hardened Images; openssl-perl-0:3.5.8-0.1.hum1@aarch64 as a component of Red Hat Hardened Images; openssl-perl-0:3.5.8-0.1.hum1@x86_64 as a component of Red Hat Hardened Images; openssl3-0:3.5.8-0.1.hum1@src as a component of Red Hat Hardened Images; openssl3-devel-0:3.5.8-0.1.hum1@aarch64 as a component of Red Hat Hardened Images; openssl3-devel-0:3.5.8-0.1.hum1@x86_64 as a component of Red Hat Hardened Images; openssl3-devel-engine-0:3.5.8-0.1.hum1@aarch64 as a component of Red Hat Hardened Images; openssl3-devel-engine-0:3.5.8-0.1.hum1@x86_64 as a component of Red Hat Hardened Images; openssl3-libs-0:3.5.8-0.1.hum1@aarch64 as a component of Red Hat Hardened Images; openssl3-libs-0:3.5.8-0.1.hum1@x86_64 as a component of Red Hat Hardened Images; python-cryptography-0:50.0.0-1.hum1@src as a component of Red Hat Hardened Images; python3-cryptography-0:50.0.0-1.hum1@aarch64 as a component of Red Hat Hardened Images; python3-cryptography-0:50.0.0-1.hum1@x86_64 as a component of Red Hat Hardened Images; and 40 more
    Red Hat Product Security ↗
  5. 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; ovmf.src as a component of Red Hat Enterprise Linux 7; compat-openssl10 as a component of Red Hat Enterprise Linux 8; compat-openssl10.src as a component of Red Hat Enterprise Linux 8; edk2-aarch64 as a component of Red Hat Enterprise Linux 8; edk2-ovmf as a component of Red Hat Enterprise Linux 8; edk2.src as a component of Red Hat Enterprise Linux 8; mingw-openssl.src as a component of Red Hat Enterprise Linux 8; mingw32-openssl as a component of Red Hat Enterprise Linux 8; and 37 more
    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; ovmf.src as a component of Red Hat Enterprise Linux 7; compat-openssl10 as a component of Red Hat Enterprise Linux 8; compat-openssl10.src as a component of Red Hat Enterprise Linux 8; edk2-aarch64 as a component of Red Hat Enterprise Linux 8; edk2-ovmf as a component of Red Hat Enterprise Linux 8; edk2.src as a component of Red Hat Enterprise Linux 8; mingw-openssl.src as a component of Red Hat Enterprise Linux 8; mingw32-openssl as a component of Red Hat Enterprise Linux 8; and 36 more
    Red Hat Product Security ↗
  6. 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; ovmf.src as a component of Red Hat Enterprise Linux 7; compat-openssl10 as a component of Red Hat Enterprise Linux 8; compat-openssl10.src as a component of Red Hat Enterprise Linux 8; edk2-aarch64 as a component of Red Hat Enterprise Linux 8; edk2-ovmf as a component of Red Hat Enterprise Linux 8; edk2.src as a component of Red Hat Enterprise Linux 8; mingw-openssl.src as a component of Red Hat Enterprise Linux 8; mingw32-openssl as a component of Red Hat Enterprise Linux 8; and 28 more
    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; ovmf.src as a component of Red Hat Enterprise Linux 7; compat-openssl10 as a component of Red Hat Enterprise Linux 8; compat-openssl10.src as a component of Red Hat Enterprise Linux 8; edk2-aarch64 as a component of Red Hat Enterprise Linux 8; edk2-ovmf as a component of Red Hat Enterprise Linux 8; edk2.src as a component of Red Hat Enterprise Linux 8; mingw-openssl.src as a component of Red Hat Enterprise Linux 8; mingw32-openssl as a component of Red Hat Enterprise Linux 8; and 37 more
    Red Hat Product Security ↗
  7. 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; ovmf.src as a component of Red Hat Enterprise Linux 7; compat-openssl10 as a component of Red Hat Enterprise Linux 8; compat-openssl10.src as a component of Red Hat Enterprise Linux 8; edk2-aarch64 as a component of Red Hat Enterprise Linux 8; edk2-ovmf as a component of Red Hat Enterprise Linux 8; edk2.src as a component of Red Hat Enterprise Linux 8; mingw-openssl.src as a component of Red Hat Enterprise Linux 8; mingw32-openssl as a component of Red Hat Enterprise Linux 8; and 27 more
    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; ovmf.src as a component of Red Hat Enterprise Linux 7; compat-openssl10 as a component of Red Hat Enterprise Linux 8; compat-openssl10.src as a component of Red Hat Enterprise Linux 8; edk2-aarch64 as a component of Red Hat Enterprise Linux 8; edk2-ovmf as a component of Red Hat Enterprise Linux 8; edk2.src as a component of Red Hat Enterprise Linux 8; mingw-openssl.src as a component of Red Hat Enterprise Linux 8; mingw32-openssl as a component of Red Hat Enterprise Linux 8; and 28 more
    Red Hat Product Security ↗
  8. 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; ovmf.src as a component of Red Hat Enterprise Linux 7; compat-openssl10 as a component of Red Hat Enterprise Linux 8; compat-openssl10.src as a component of Red Hat Enterprise Linux 8; edk2-aarch64 as a component of Red Hat Enterprise Linux 8; edk2-ovmf as a component of Red Hat Enterprise Linux 8; edk2.src as a component of Red Hat Enterprise Linux 8; mingw32-openssl as a component of Red Hat Enterprise Linux 8; mingw64-openssl as a component of Red Hat Enterprise Linux 8; and 26 more
    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; ovmf.src as a component of Red Hat Enterprise Linux 7; compat-openssl10 as a component of Red Hat Enterprise Linux 8; compat-openssl10.src as a component of Red Hat Enterprise Linux 8; edk2-aarch64 as a component of Red Hat Enterprise Linux 8; edk2-ovmf as a component of Red Hat Enterprise Linux 8; edk2.src as a component of Red Hat Enterprise Linux 8; mingw-openssl.src as a component of Red Hat Enterprise Linux 8; mingw32-openssl as a component of Red Hat Enterprise Linux 8; and 27 more
    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-2026-35488↗Red Hat Product Security security advisory↗CVE authority or vendor 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-2026-42771 · cve.blacktree.nl