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CVE-2026-80805

xfs: validate attr entry pointer before field access

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.267, 5.15.218, 6.1.185, 6.6.154, 6.12.106, and 3 more
None on Exploit-DB, Metasploit or GitHub

Summary

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.

Timeline

  1. CVE published
  2. Record last updated

Affected versions

  • Linux Linux

    From c84760659dcf237902d4cc997cd5f55cb3b2807f · fixed in 0f82586741e39926542f621bafa424e237a04fa4; From c84760659dcf237902d4cc997cd5f55cb3b2807f · fixed in 134d82a2b5e3eba3ebf58753a1387b22f26ca1de; From c84760659dcf237902d4cc997cd5f55cb3b2807f · fixed in 03a12253dd2a036545bdb0110a4e0b8dc70f8e7c; From c84760659dcf237902d4cc997cd5f55cb3b2807f · fixed in e99120b5944a16d0bc27e52b33de78bcdaaabf5c; From c84760659dcf237902d4cc997cd5f55cb3b2807f · fixed in 98a42bb9d60d42898c3494de351a1bf508348cde; From c84760659dcf237902d4cc997cd5f55cb3b2807f · fixed in 184c1a80421a5b5ddcd262e47980ce2e67fee211; From c84760659dcf237902d4cc997cd5f55cb3b2807f · fixed in 9f92e749fc08b7ff3d9da190c4d1b2273745b282; From c84760659dcf237902d4cc997cd5f55cb3b2807f · fixed in c35da2bac6f7cb9a9be73f188b4fcc324615c327; From c84760659dcf237902d4cc997cd5f55cb3b2807f · fixed in b7eea80be25f3334f131d52982b3131aba77b97d

  • Linux Linux

    5.5

  • KernelLinux

    From 5.5.0 · fixed in 5.10.267; From 5.11.0 · fixed in 5.15.218; From 5.16.0 · fixed in 6.1.185; From 6.2.0 · fixed in 6.6.154; From 6.7.0 · fixed in 6.12.106; From 6.13.0 · fixed in 6.18.47; From 6.19.0 · fixed in 7.1.11; From 7.2.0 · fixed in 7.2.1

References 9

git.kernel.org