ZDI-26-834: Linux Kernel IPv6 AH Routing Header Integer Underflow Local Privilege Escalation Vulnerability
Source Zero Day Initiative
Not known to be exploited.
Data as of 29 Oct 2026, 19:18 UTC
Rated High by Zero Day Initiative · CVSS not yet scored by NVD
Exploitation evidence
Disclosed: evidence found.
Public on cve.org; its publication date is not in this record
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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.