CVE-2026-80805
UnknownSummary
In the Linux kernel XFS filesystem, the attribute entry verification function accesses fields before checking whether the entry pointer is within buffer bounds. This can lead to an out-of-bounds read if the nameidx field points near the end of the buffer. Explicit bounds checks for entry pointers have been added before accessing their fields.
Risk Assessment
The risk includes potential kernel memory information leak or system panic due to out-of-bounds read. This could be exploited by a local attacker with privileges to mount and operate on XFS filesystems.
Recommendation
It is recommended to apply the official Linux kernel patch containing this fix as soon as possible. Monitor the availability of updates for your distribution and deploy them urgently.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS