> CVE-2026-80844

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PUBLISHED
2026-09-04 16:18
MODIFIED
2026-09-04 16:18
EPSS (Prob. Exploit)
0.43%
Top 63.8%
DATA SOURCES:
NVD 🔗 2026-09-04 FIRST EPSS 🔗 2026-10-18 OSV 🔗 2026-10-26 MSRC 🔗 2026-09-08

> DESCRIPTION

In the Linux kernel, the following vulnerability has been resolved: xfrm: ah6: validate routing header segments_left AH6 rearranges routing-header addresses before computing or verifying the ICV. ipv6_rearrange_rthdr() assumes that segments_left is not larger than the number of addresses described by the routing header's hdrlen field. That assumption does not hold for raw IPv6 HDRINCL packets. A packet with hdrlen equal to 2 describes one address, but can carry an arbitrary segments_left value. With segments_left equal to 255, the function moves its address pointer 4,064 bytes backwards and passes a 4,064-byte length to memmove(), resulting in an out-of-bounds access. Validate the invariant locally before modifying the routing header or performing any address-pointer arithmetic, and propagate malformed-header errors to the existing AH6 input and output error paths.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: kernel security, bug fix, and enhancement update
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An update for kernel-rt is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System...
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An update for kernel is now available for Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important. A Co...
Red Hat Security Advisory: kernel security update
An update for kernel is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important. A Co...
Red Hat Security Advisory: kernel security update
An update for kernel is now available for Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions and Red Hat Enterprise Linux 8.8 Telecommunications Update Service. Red Hat Product Security h...
Red Hat Security Advisory: kernel-rt security update
An update for kernel-rt is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important. A...
Red Hat Security Advisory: kernel security update
An update for kernel is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On. Red Hat Prod...
Red Hat Security Advisory: kernel security update
An update for kernel is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On. Red Hat Prod...
Red Hat Security Advisory: kernel security, bug fix, and enhancement update
An update for kernel is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (C...
Red Hat Security Advisory: kernel security, bug fix, and enhancement update
An update for kernel is now available for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (...
Red Hat Security Advisory: kernel security update
An update for kernel is now available for Red Hat Enterprise Linux 7 Extended Lifecycle Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vuln...
Red Hat Security Advisory: kernel security update
An update for kernel is now available for Red Hat Enterprise Linux 9.6 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulne...
Red Hat Security Advisory: kernel-rt security update
An update for kernel-rt is now available for Red Hat Enterprise Linux 7 Extended Lifecycle Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common V...
Red Hat Security Advisory: kernel security update
An update for kernel is now available for Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION. Red Hat Product Security has rated this update as having a security impact of Important....
Red Hat Security Advisory: kernel security update
An update for kernel is now available for Red Hat Enterprise Linux 10.0 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vuln...
Red Hat Security Advisory: kernel security update
An update for kernel is now available for NVIDIA for RHEL 10. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) bas...
Red Hat Security Advisory: OpenShift Container Platform 4.22.17 bug fix and security update
Red Hat OpenShift Container Platform release 4.22.17 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red H...
Red Hat Security Advisory: OpenShift Container Platform 4.21.36 bug fix and security update
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Red Hat Security Advisory: OpenShift Container Platform 4.19.50 bug fix and security update
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Red Hat Security Advisory: OpenShift Container Platform 4.21.37 bug fix and security update
Red Hat OpenShift Container Platform release 4.21.37 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red...
Red Hat Security Advisory: OpenShift Container Platform 4.13.72 bug fix and security update
Red Hat OpenShift Container Platform release 4.13.72 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red H...
Red Hat Security Advisory: OpenShift Container Platform 4.12.100 bug fix and security update
Red Hat OpenShift Container Platform release 4.12.100 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red...
Red Hat Security Advisory: OpenShift Container Platform 4.18.57 bug fix and security update
Red Hat OpenShift Container Platform release 4.18.57 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red...
Red Hat Security Advisory: OpenShift Container Platform 4.16.73 bug fix and security update
Red Hat OpenShift Container Platform release 4.16.73 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red H...
Red Hat Security Advisory: OpenShift Container Platform 4.17.59 bug fix and security update
Red Hat OpenShift Container Platform release 4.17.59 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red H...
Red Hat Security Advisory: OpenShift Container Platform 4.14.76 bug fix and security update
Red Hat OpenShift Container Platform release 4.14.76 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red H...
Red Hat Security Advisory: OpenShift Container Platform 4.15.70 bug fix and security update
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> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

xfrm: ah6: validate routing header segments_left

AFFECTED PACKAGES:
Unknown / Unknown
1921 versions affected
Linux / Kernel

> HISTORIQUE DES MODIFICATIONS

Première apparition
04/09/2026 16:18
Source: NVD
Total des modifications: 0 Dernière mise à jour: 1 month ago

> REFERENCES

https://git.kernel.org/stable/c/0bf11081ad3753938a2b48723ce6298dbac743a1
https://git.kernel.org/stable/c/1516e31ac458a738be485620579d8f7fb2700fcb
https://git.kernel.org/stable/c/1b7e066eabcc7d6d8f476c34739b45932f2f4c31
https://git.kernel.org/stable/c/2dc650956e4e163b879b3fb1027f9557abc5c985
https://git.kernel.org/stable/c/46640c814f25f096b0b0045ca50e1b7030cd8a30
https://git.kernel.org/stable/c/48b0e36cf54358276ee7aa897034c973097d2bc9
https://git.kernel.org/stable/c/6733ae71268a27d598cfb3f3339a3c950b9b656d
https://git.kernel.org/stable/c/7bad4bda74dc4713f398d3b7624ff05478e3a568
https://git.kernel.org/stable/c/f00df8500e5a36ba70d336fd34bd2152ea074e5f
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