CVE-2026-80805

/// Technical 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.

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References