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CVE-2026-80844VulnerabilityPublished

ZDI-26-834: Linux Kernel IPv6 AH Routing Header Integer Underflow Local Privilege Escalation Vulnerability

Source Zero Day Initiative

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Not known to be exploited.

Data as of 29 Oct 2026, 19:18 UTC

Severity
High

Rated High by Zero Day Initiative · CVSS not yet scored by NVD

Exploitation evidence

  1. Disclosed: evidence found.

    Public on cve.org; its publication date is not in this record

  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 29 Oct 2026.

What to do

AI-suggested

Users should monitor official Linux Kernel advisories for updates addressing CVE-2026-80844 and apply patches once available. Until then, restricting local code execution privileges can reduce risk.

Description

A local privilege escalation vulnerability exists in the Linux Kernel related to the IPv6 AH Routing Header. Exploitation requires the attacker to have the ability to execute low-privileged code on the target system. The vulnerability is assigned CVE-2026-80844 and has a high severity rating.

References

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