Sending certain HTTP/2 frames can cause a server to panic in golang.org/x/net
golang.org/x/net · golang.org/x/net/http2
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 281 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.
Published severityHigh→Operational 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 0.65% 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
Confirm that the asset runs golang.org/x/net golang.org/x/net/http2 and falls inside the recorded affected range.
Verify the installed build against the product-specific fixed version after deployment.
Validate exposure, authentication requirements and compensating controls in the actual environment.
Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Cross-source reconciliation
Remediation availability differs by product scope
Verified remediation exists for at least one product or source, but 281 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.
Red Hat Product Security: 281 affected or under-investigation product states without a fixed product state in the same current advisory
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 release
Source package
Vendor state
Fixed version
Evidence
Debian trixietrixie · source
golang-golang-x-net
Not affectedDebian marks this release not affected (fixed-version marker 0).
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-2026-27141 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitygolang.org/x/net/http2: golang.org/x/net/http2: Denial of Service due to malformed HTTP/2 frames
2 known affected
The vendor explicitly identifies these products as affected by this CVE.
rhel10/bootc-image-builder as a component of Red Hat Enterprise Linux 10
rhel9/bootc-image-builder as a component of Red Hat Enterprise Linux 9
Summary
A flaw was found in golang.org/x/net/http2. A remote attacker can exploit this vulnerability by sending specially crafted HTTP/2 frames, which are data packets used in the HTTP/2 protocol. Due to a missing check for null values, processing these specific frames (types 0x0a through 0x0f) can cause the server to crash. This leads to a Denial of Service (DoS) condition, making the affected server unavailable to legitimate users.
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-2026-8880
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 281 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
Due to missing nil check, sending 0x0a-0x0f HTTP/2 frames will cause a running server to panic
What
Due to missing nil check, sending 0x0a-0x0f HTTP/2 frames will cause a running server to panic
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 cause the confidentiality, integrity or availability impact described by the vendor.
What
Due to missing nil check, sending 0x0a-0x0f HTTP/2 frames will cause a running server to panic
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 cause the confidentiality, integrity or availability impact described by the vendor.
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 → cause the confidentiality, integrity or availability impact described by the vendor
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: 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.
NetworkUnauthenticatedCWE-476
A
Official authority intelligence
Only matched European and national findings are included. Language selectors and unavailable sources are omitted.
ENISA EUVD · EUVD-2026-8880Official EUVD mapping
0 linked advisory records.
Official EUVD record ↗BSI · German · WID-SEC-2026-2437Oracle Communications: Mehrere Schwachstellen
Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in Oracle Communications ausnutzen, um die Vertraulichkeit, Integrität und Verfügbarkeit zu gefährden.
Official advisory ↗BSI · German · WID-SEC-2026-1654IBM App Connect Enterprise: Mehrere Schwachstellen
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in IBM App Connect Enterprise ausnutzen, um beliebigen Programmcode auszuführen, Daten zu manipulieren, Cross-Site-Scripting-Angriffe durchzuführen, vertrauliche Informationen offenzulegen oder einen Denial-of-Service-Zustand auszulösen.
Official advisory ↗BSI · German · WID-SEC-2026-1618Splunk Splunk Enterprise: Mehrere Schwachstellen
Ein Angreifer kann mehrere Schwachstellen in Splunk Splunk Enterprise ausnutzen, um Sicherheitsvorkehrungen zu umgehen, Daten zu manipulieren, vertrauliche Informationen offenzulegen oder einen Denial-of-Service-Zustand zu verursachen.
Official advisory ↗Cyber Security Agency of Singapore · English · CSA-SB-20260304Security Bulletin 4 Mar 2026
The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 4 Mar 2026, published on 4 March 2026. Open the linked bulletin for the product, severity and reference information published in that issue.
Official advisory ↗CERT-FR · French · CERTFR-2026-AVI-0627Multiples vulnérabilités dans les produits Splunk
Official advisory ↗CERT-FR · French · CERTFR-2026-AVI-0299Multiples 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-0268Multiples vulnérabilités dans Traefik
De multiples vulnérabilités ont été découvertes dans Traefik. Elles permettent à un attaquant de provoquer un déni de service à distance et un contournement de la politique de sécurité.
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.
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 26 Feb 2026 · Last source change 27 Feb 2026, 19:11 UTC · CWE-476 · NULL Pointer Dereference
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-2026-8880
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD not scheduled
Core structured fields are present and their contributing authorities are shown above.
Affected versionsThe structured affected or fixed version information changed.
Before
0.50.0 < 0.51.0 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
After
0.50.0 < 0.51.0 · Fixed: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/
Affected versionsThe structured affected or fixed version information changed.
Before
rhel10/bootc-image-builder as a component of Red Hat Enterprise Linux 10; rhel9/bootc-image-builder as a component of Red Hat Enterprise Linux 9 · Fixed: golang1-25-main@aarch64 as a component of Red Hat Hardened Images; golang1-25-main@noarch as a component of Red Hat Hardened Images; golang1-25-main@src as a component of Red Hat Hardened Images; golang1-25-main@x86_64 as a component of Red Hat Hardened Images; golang1-26-main@aarch64 as a component of Red Hat Hardened Images; golang1-26-main@noarch as a component of Red Hat Hardened Images; golang1-26-main@src as a component of Red Hat Hardened Images; golang1-26-main@x86_64 as a component of Red Hat Hardened Images; registry.redhat.io/openshift-pipelines/pipelines-operator-bundle@sha256:37f76414fb74a87e6aaa715e8a645fb9c4a5d383c9c232fc0a468760bafe0d63_amd64 as a component of Red Hat OpenShift Pipelines 1.21; registry.redhat.io/openshift-pipelines/pipelines-rhel9-operator@sha256:0739254d745378452259e4d9a84ba9f6bd03e523bda40d9fadfd999812003421_amd64 as a component of Red Hat OpenShift Pipelines 1.21; registry.redhat.io/openshift-pipelines/pipelines-rhel9-operator@sha256:3278f98d80e2626bf481811b03908d955019137b47bacbfc6894949e067f39b1_ppc64le as a component of Red Hat OpenShift Pipelines 1.21; registry.redhat.io/openshift-pipelines/pipelines-rhel9-operator@sha256:73959111c980def943d458774e2b86446e9cc5f96fa6f2d4b45b7db563f44d4b_s390x as a component of Red Hat OpenShift Pipelines 1.21; registry.redhat.io/openshift-pipelines/pipelines-rhel9-operator@sha256:f30b4949b3342a56ce37ab6368e3cd58d23581f8190b0652b1e2e6a4b9daed91_arm64 as a component of Red Hat OpenShift Pipelines 1.21; registry.redhat.io/odf4/cephcsi-rhel9-operator@sha256:022f660bb0be440e9d99abf8815ede618710a390d315ccc79e9812a1c0f9ae02_arm64 as a component of Red Hat Openshift Data Foundation 4.22; registry.redhat.io/odf4/cephcsi-rhel9-operator@sha256:1e55fe6360f7b5bce7d4ae524235b3ed5c8af0088b90c25c85dc8fe29319e777_ppc64le as a component of Red Hat Openshift Data Foundation 4.22; registry.redhat.io/odf4/cephcsi-rhel9-operator@sha256:9e492330bdada69efd431ecc370e3082fdd9366d2e5a00901f1101fb71fbaea5_amd64 as a component of Red Hat Openshift Data Foundation 4.22; registry.redhat.io/odf4/cephcsi-rhel9-operator@sha256:bdbd70d08ef6c7266a0a7cf0026192fffdb7c96a9bd13eec21a1046dc60ed54d_s390x as a component of Red Hat Openshift Data Foundation 4.22; registry.redhat.io/odf4/cephcsi-rhel9@sha256:05df2bcbadb214e4873082f282ef013565f04f24dce406d3802288d6ad574741_amd64 as a component of Red Hat Openshift Data Foundation 4.22; registry.redhat.io/odf4/cephcsi-rhel9@sha256:4d2215693809fd61f6d4d81333b41739fd7e34ad87fe79f9176db69c95265acb_s390x as a component of Red Hat Openshift Data Foundation 4.22; registry.redhat.io/odf4/cephcsi-rhel9@sha256:bda64b773b0cad6ac42ef57948b61ae92ab97fcf264e946f83fda183850af573_arm64 as a component of Red Hat Openshift Data Foundation 4.22; registry.redhat.io/odf4/cephcsi-rhel9@sha256:fb187a502fe69355bf96070a3761e1800a66f6b282d1e1169bba016d9085eee6_ppc64le as a component of Red Hat Openshift Data Foundation 4.22; registry.redhat.io/odf4/devicefinder-rhel9@sha256:0ec0bc6ad7ee67b04329e5ecd38d2875bfb32374eda4afcb3748b38c35e3b99d_s390x as a component of Red Hat Openshift Data Foundation 4.22; registry.redhat.io/odf4/devicefinder-rhel9@sha256:9841e96fcd4ce5aa597e1f0055a51a75aa01d26b4c347f245b0b550e17546389_ppc64le as a component of Red Hat Openshift Data Foundation 4.22; registry.redhat.io/odf4/devicefinder-rhel9@sha256:c1f7e2899e8cd209f08d3e7501a3dc7b8237cc4ca980792902e131df23d157ef_amd64 as a component of Red Hat Openshift Data Foundation 4.22; registry.redhat.io/odf4/devicefinder-rhel9@sha256:e08093d4536d5d416e53344a12ddca0d11e6fe0d2ba4fdc274993ec65a375e15_arm64 as a component of Red Hat Openshift Data Foundation 4.22; registry.redhat.io/odf4/mcg-core-rhel9@sha256:10e9e92062c5a5f20882f2b50beff64f79f7694c381aec03c76f39000d85dada_ppc64le as a component of Red Hat Openshift Data Foundation 4.22; registry.redhat.io/odf4/mcg-core-rhel9@sha256:2fd265900415e09d09023b1f34b6abf7c69c788112ba2d1584cd5351d02256e1_arm64 as a component of Red Hat Openshift Data Foundation 4.22; registry.redhat.io/odf4/mcg-core-rhel9@sha256:95e75300d8973cff3e15e02481c134fe82f04bbfcf5a7d47f3e70bc4be2afdf7_s390x as a component of Red Hat Openshift Data Foundation 4.22; registry.redhat.io/odf4/mcg-core-rhel9@sha256:e556c0bb72ec94a866d8377c1c6b86f8378e0600cc438dc07b5b0bc4f8fe8bec_amd64 as a component of Red Hat Openshift Data Foundation 4.22; registry.redhat.io/odf4/mcg-rhel9-operator@sha256:37413dc3a5a103aa2bf7a3729015273bff19ab3cd075a0e116ec815ebddc251c_amd64 as a component of Red Hat Openshift Data Foundation 4.22; and 91 more
After
rhel10/bootc-image-builder as a component of Red Hat Enterprise Linux 10; rhel9/bootc-image-builder as a component of Red Hat Enterprise Linux 9 · Fixed: golang1-25-main@aarch64 as a component of Red Hat Hardened Images; golang1-25-main@noarch as a component of Red Hat Hardened Images; golang1-25-main@src as a component of Red Hat Hardened Images; golang1-25-main@x86_64 as a component of Red Hat Hardened Images; golang1-26-main@aarch64 as a component of Red Hat Hardened Images; golang1-26-main@noarch as a component of Red Hat Hardened Images; golang1-26-main@src as a component of Red Hat Hardened Images; golang1-26-main@x86_64 as a component of Red Hat Hardened Images; registry.redhat.io/openshift-pipelines/pipelines-operator-bundle@sha256:37f76414fb74a87e6aaa715e8a645fb9c4a5d383c9c232fc0a468760bafe0d63_amd64 as a component of Red Hat OpenShift Pipelines 1.21; registry.redhat.io/openshift-pipelines/pipelines-rhel9-operator@sha256:0739254d745378452259e4d9a84ba9f6bd03e523bda40d9fadfd999812003421_amd64 as a component of Red Hat OpenShift Pipelines 1.21; registry.redhat.io/openshift-pipelines/pipelines-rhel9-operator@sha256:3278f98d80e2626bf481811b03908d955019137b47bacbfc6894949e067f39b1_ppc64le as a component of Red Hat OpenShift Pipelines 1.21; registry.redhat.io/openshift-pipelines/pipelines-rhel9-operator@sha256:73959111c980def943d458774e2b86446e9cc5f96fa6f2d4b45b7db563f44d4b_s390x as a component of Red Hat OpenShift Pipelines 1.21; registry.redhat.io/openshift-pipelines/pipelines-rhel9-operator@sha256:f30b4949b3342a56ce37ab6368e3cd58d23581f8190b0652b1e2e6a4b9daed91_arm64 as a component of Red Hat OpenShift Pipelines 1.21; registry.redhat.io/odf4/cephcsi-rhel9-operator@sha256:022f660bb0be440e9d99abf8815ede618710a390d315ccc79e9812a1c0f9ae02_arm64 as a component of Red Hat Openshift Data Foundation 4.22; registry.redhat.io/odf4/cephcsi-rhel9-operator@sha256:1e55fe6360f7b5bce7d4ae524235b3ed5c8af0088b90c25c85dc8fe29319e777_ppc64le as a component of Red Hat Openshift Data Foundation 4.22; registry.redhat.io/odf4/cephcsi-rhel9-operator@sha256:9e492330bdada69efd431ecc370e3082fdd9366d2e5a00901f1101fb71fbaea5_amd64 as a component of Red Hat Openshift Data Foundation 4.22; registry.redhat.io/odf4/cephcsi-rhel9-operator@sha256:bdbd70d08ef6c7266a0a7cf0026192fffdb7c96a9bd13eec21a1046dc60ed54d_s390x as a component of Red Hat Openshift Data Foundation 4.22; registry.redhat.io/odf4/cephcsi-rhel9@sha256:05df2bcbadb214e4873082f282ef013565f04f24dce406d3802288d6ad574741_amd64 as a component of Red Hat Openshift Data Foundation 4.22; registry.redhat.io/odf4/cephcsi-rhel9@sha256:4d2215693809fd61f6d4d81333b41739fd7e34ad87fe79f9176db69c95265acb_s390x as a component of Red Hat Openshift Data Foundation 4.22; registry.redhat.io/odf4/cephcsi-rhel9@sha256:bda64b773b0cad6ac42ef57948b61ae92ab97fcf264e946f83fda183850af573_arm64 as a component of Red Hat Openshift Data Foundation 4.22; registry.redhat.io/odf4/cephcsi-rhel9@sha256:fb187a502fe69355bf96070a3761e1800a66f6b282d1e1169bba016d9085eee6_ppc64le as a component of Red Hat Openshift Data Foundation 4.22; registry.redhat.io/odf4/devicefinder-rhel9@sha256:0ec0bc6ad7ee67b04329e5ecd38d2875bfb32374eda4afcb3748b38c35e3b99d_s390x as a component of Red Hat Openshift Data Foundation 4.22; registry.redhat.io/odf4/devicefinder-rhel9@sha256:9841e96fcd4ce5aa597e1f0055a51a75aa01d26b4c347f245b0b550e17546389_ppc64le as a component of Red Hat Openshift Data Foundation 4.22; registry.redhat.io/odf4/devicefinder-rhel9@sha256:c1f7e2899e8cd209f08d3e7501a3dc7b8237cc4ca980792902e131df23d157ef_amd64 as a component of Red Hat Openshift Data Foundation 4.22; registry.redhat.io/odf4/devicefinder-rhel9@sha256:e08093d4536d5d416e53344a12ddca0d11e6fe0d2ba4fdc274993ec65a375e15_arm64 as a component of Red Hat Openshift Data Foundation 4.22; registry.redhat.io/odf4/mcg-core-rhel9@sha256:10e9e92062c5a5f20882f2b50beff64f79f7694c381aec03c76f39000d85dada_ppc64le as a component of Red Hat Openshift Data Foundation 4.22; registry.redhat.io/odf4/mcg-core-rhel9@sha256:2fd265900415e09d09023b1f34b6abf7c69c788112ba2d1584cd5351d02256e1_arm64 as a component of Red Hat Openshift Data Foundation 4.22; registry.redhat.io/odf4/mcg-core-rhel9@sha256:95e75300d8973cff3e15e02481c134fe82f04bbfcf5a7d47f3e70bc4be2afdf7_s390x as a component of Red Hat Openshift Data Foundation 4.22; registry.redhat.io/odf4/mcg-core-rhel9@sha256:e556c0bb72ec94a866d8377c1c6b86f8378e0600cc438dc07b5b0bc4f8fe8bec_amd64 as a component of Red Hat Openshift Data Foundation 4.22; registry.redhat.io/odf4/mcg-rhel9-operator@sha256:37413dc3a5a103aa2bf7a3729015273bff19ab3cd075a0e116ec815ebddc251c_amd64 as a component of Red Hat Openshift Data Foundation 4.22; and 95 more
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.