Bug 2528586 (CVE-2026-80805) - CVE-2026-80805 kernel: xfs: validate attr entry pointer before field access
Summary: CVE-2026-80805 kernel: xfs: validate attr entry pointer before field access
Keywords:
Status: NEW
Alias: CVE-2026-80805
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-04 15:37 UTC by OSIDB Bzimport
Modified: 2026-10-25 23:21 UTC (History)
17 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:


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Description OSIDB Bzimport 2026-09-04 15:37:06 UTC
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.


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