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CVE-2026-80805

Unknown

Last modified

CVE-2026-80805 is a vulnerability of currently unknown severity. 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..

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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= c84760659dcf237902d4cc997cd5f55cb3b2807f, < 0f82586741e39926542f621bafa424e237a04fa4; >= c84760659dcf237902d4cc997cd5f55cb3b2807f, < 134d82a2b5e3eba3ebf58753a1387b22f26ca1de; >= c84760659dcf237902d4cc997cd5f55cb3b2807f, < 03a12253dd2a036545bdb0110a4e0b8dc70f8e7c; >= c84760659dcf237902d4cc997cd5f55cb3b2807f, < e99120b5944a16d0bc27e52b33de78bcdaaabf5c; >= c84760659dcf237902d4cc997cd5f55cb3b2807f, < 98a42bb9d60d42898c3494de351a1bf508348cde; >= c84760659dcf237902d4cc997cd5f55cb3b2807f, < 184c1a80421a5b5ddcd262e47980ce2e67fee211; >= c84760659dcf237902d4cc997cd5f55cb3b2807f, < 9f92e749fc08b7ff3d9da190c4d1b2273745b282; >= c84760659dcf237902d4cc997cd5f55cb3b2807f, < c35da2bac6f7cb9a9be73f188b4fcc324615c327; >= c84760659dcf237902d4cc997cd5f55cb3b2807f, < b7eea80be25f3334f131d52982b3131aba77b97d
LinuxLinux5.5

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-80805?
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 severe is CVE-2026-80805?
Severity scoring for CVE-2026-80805 is pending analysis.
How do I fix CVE-2026-80805?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST