Vulnerability 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
- https://git.kernel.org/stable/c/03a12253dd2a036545bdb0110a4e0b8dc70f8e7c
- https://git.kernel.org/stable/c/0f82586741e39926542f621bafa424e237a04fa4
- https://git.kernel.org/stable/c/134d82a2b5e3eba3ebf58753a1387b22f26ca1de
- https://git.kernel.org/stable/c/184c1a80421a5b5ddcd262e47980ce2e67fee211
- https://git.kernel.org/stable/c/98a42bb9d60d42898c3494de351a1bf508348cde
- https://git.kernel.org/stable/c/9f92e749fc08b7ff3d9da190c4d1b2273745b282
- https://git.kernel.org/stable/c/b7eea80be25f3334f131d52982b3131aba77b97d
- https://git.kernel.org/stable/c/c35da2bac6f7cb9a9be73f188b4fcc324615c327
- https://git.kernel.org/stable/c/e99120b5944a16d0bc27e52b33de78bcdaaabf5c
FAQ
What is CVE-2026-80805?
CVE-2026-80805 is a documented vulnerability. 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, valuele...
How severe is CVE-2026-80805?
CVSS scoring is not yet available for CVE-2026-80805. Check NVD for updates.
Is there a patch for CVE-2026-80805?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.