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VulnerabilityPublished Updated

CVE-2026-80875: Linux kernel · ipvs: use parsed transport offset in TCP state lookup

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in f6f550f26562d191c30b2818e7925dcb1c7f166c : update Linux kernel when convenient.

Data as of 6 Nov 2026, 17:34 UTC

Severity
Medium

Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD

Thin evidence

One scorer or none
CISA SSVC
Exploitation
No evidence of active exploitation and no public proof of concept
Automatable
Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact
Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch
Available – fixed in f6f550f26562d191c30b2818e7925dcb1c7f166c, d73f4249776dd970ad65a69cfc51613dd8a034bb, d45f73c274435703e8d7bc9d8b742a5d9111ab6e +5

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 4 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 0bbdd42b7efa66685b6d74701bcde3a596a3a59d, < f6f550f26562d191c30b2818e7925dcb1c7f166c
Fixed in
  • f6f550f26562d191c30b2818e7925dcb1c7f166c
LinuxLinuxAffected
  • ≥ 0bbdd42b7efa66685b6d74701bcde3a596a3a59d, < d73f4249776dd970ad65a69cfc51613dd8a034bb
Fixed in
  • d73f4249776dd970ad65a69cfc51613dd8a034bb
LinuxLinuxAffected
  • ≥ 0bbdd42b7efa66685b6d74701bcde3a596a3a59d, < d45f73c274435703e8d7bc9d8b742a5d9111ab6e
Fixed in
  • d45f73c274435703e8d7bc9d8b742a5d9111ab6e
LinuxLinuxAffected
  • ≥ 0bbdd42b7efa66685b6d74701bcde3a596a3a59d, < c2ee845e292c278fac75bf28d96bc892607fd5c4
Fixed in
  • c2ee845e292c278fac75bf28d96bc892607fd5c4
LinuxLinuxAffected
  • ≥ 0bbdd42b7efa66685b6d74701bcde3a596a3a59d, < 5848e914b85e360a2dd9d19c00a72e2ea9617dd0
Fixed in
  • 5848e914b85e360a2dd9d19c00a72e2ea9617dd0
LinuxLinuxAffected
  • ≥ 0bbdd42b7efa66685b6d74701bcde3a596a3a59d, < 2500fa3958b1ba51c2b065e39db1b04dfa7e23a2
Fixed in
  • 2500fa3958b1ba51c2b065e39db1b04dfa7e23a2

AI-suggested

A fix is available and has been applied in Linux kernel versions following 2.6.28. Users should update to a fixed kernel version containing the referenced commits to remediate this issue.

Description

A vulnerability in the Linux kernel's IP Virtual Server (ipvs) TCP state handling was fixed. The issue involved incorrect parsing of the TCP header offset for IPv6 packets with extension headers, causing the TCP state lookup to read incorrect bytes. This flaw was resolved by using the already parsed transport offset rather than a fixed size assumption. The vulnerability affects Linux kernel version 2.6.28 and was addressed in subsequent commits.

References

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