CVE-2026-80805
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.
How to fix
- Linux Linux0f82586741e39926542f621bafa424e237a04fa4, 134d82a2b5e3eba3ebf58753a1387b22f26ca1de, 03a12253dd2a036545bdb0110a4e0b8dc70f8e7c, e99120b5944a16d0bc27e52b33de78bcdaaabf5c, 98a42bb9d60d42898c3494de351a1bf508348cde, 184c1a80421a5b5ddcd262e47980ce2e67fee211, 9f92e749fc08b7ff3d9da190c4d1b2273745b282, c35da2bac6f7cb9a9be73f188b4fcc324615c327, b7eea80be25f3334f131d52982b3131aba77b97d or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | c84760659dcf237902d4cc997cd5f55cb3b2807f ≤ v < 0f82586741e39926542f621bafa424e237a04fa4, c84760659dcf237902d4cc997cd5f55cb3b2807f ≤ v < 134d82a2b5e3eba3ebf58753a1387b22f26ca1de, c84760659dcf237902d4cc997cd5f55cb3b2807f ≤ v < 03a12253dd2a036545bdb0110a4e0b8dc70f8e7c, c84760659dcf237902d4cc997cd5f55cb3b2807f ≤ v < e99120b5944a16d0bc27e52b33de78bcdaaabf5c, c84760659dcf237902d4cc997cd5f55cb3b2807f ≤ v < 98a42bb9d60d42898c3494de351a1bf508348cde, c84760659dcf237902d4cc997cd5f55cb3b2807f ≤ v < 184c1a80421a5b5ddcd262e47980ce2e67fee211, c84760659dcf237902d4cc997cd5f55cb3b2807f ≤ v < 9f92e749fc08b7ff3d9da190c4d1b2273745b282, c84760659dcf237902d4cc997cd5f55cb3b2807f ≤ v < c35da2bac6f7cb9a9be73f188b4fcc324615c327, c84760659dcf237902d4cc997cd5f55cb3b2807f ≤ v < b7eea80be25f3334f131d52982b3131aba77b97d, 5.5 | 0f82586741e39926542f621bafa424e237a04fa4, 134d82a2b5e3eba3ebf58753a1387b22f26ca1de, 03a12253dd2a036545bdb0110a4e0b8dc70f8e7c, e99120b5944a16d0bc27e52b33de78bcdaaabf5c, 98a42bb9d60d42898c3494de351a1bf508348cde, 184c1a80421a5b5ddcd262e47980ce2e67fee211, 9f92e749fc08b7ff3d9da190c4d1b2273745b282, c35da2bac6f7cb9a9be73f188b4fcc324615c327, b7eea80be25f3334f131d52982b3131aba77b97d |
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