CVE-2026-80805: Linux kernel · xfs: validate attr entry pointer before field access
Source GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 12:55 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 4 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 26 Oct 2026.
Description
In the Linux kernel, the following vulnerability has been resolved: xfs: validate attr entry pointer before field access xfs_attr3_leaf_verify_entry() accesses lentry/rentry fields (namelen, valuelen) before checking if the entry pointer itself is within bounds. If nameidx is crafted to point near the end of the buffer, these field accesses can read out-of-bounds before the bounds check at name_end > buf_end is performed. Add explicit bounds checks for entry pointers before accessing their fields. Use offsetof() to check that the start of the flexible array member (nameval/name) is within bounds, which ensures all preceding fields are safe to access.
References
- nvd.nist.gov/vuln/detail/CVE-2026-80805 (opens in a new tab)
- git.kernel.org/stable/c/03a12253dd2a036545bdb0110a4e0b8dc70f8e7c (opens in a new tab)
- git.kernel.org/stable/c/0f82586741e39926542f621bafa424e237a04fa4 (opens in a new tab)
- git.kernel.org/stable/c/134d82a2b5e3eba3ebf58753a1387b22f26ca1de (opens in a new tab)
- git.kernel.org/stable/c/184c1a80421a5b5ddcd262e47980ce2e67fee211 (opens in a new tab)
- git.kernel.org/stable/c/98a42bb9d60d42898c3494de351a1bf508348cde (opens in a new tab)
- git.kernel.org/stable/c/9f92e749fc08b7ff3d9da190c4d1b2273745b282 (opens in a new tab)
- git.kernel.org/stable/c/b7eea80be25f3334f131d52982b3131aba77b97d (opens in a new tab)
- git.kernel.org/stable/c/c35da2bac6f7cb9a9be73f188b4fcc324615c327 (opens in a new tab)
- git.kernel.org/stable/c/e99120b5944a16d0bc27e52b33de78bcdaaabf5c (opens in a new tab)