xfs: don't walk off the end of a null sc->sa.agi_bp in AGI repair (CVE-2026-80533) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-80533

xfs: don't walk off the end of a null sc->sa.agi_bp in AGI repair

Answer in brief

CVE-2026-80533 records a Unknown severity vulnerability in xfs: don't walk off the end of a null sc->sa.agi_bp in AGI repair. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 26, 2026Updated Aug 26, 2026Source checked Aug 26, 2026First seen by HOL Aug 26, 2026Material review Aug 26, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=ab97f4b1c030750f2475bf4da8a9554d02206640 <43b4ecbc948a2e441804c9d7b772deb6b2e44e3d \|\| >=ab97f4b1c030750f2475bf4da8a9554d02206640 <c36d7f68f1c2e7e528ad11044a0bd6a3016a6a03 \|\| >=ab97f4b1c030750f2475bf4da8a9554d02206640 <a6cfd0e4bb1e5f4dd2a67fa99eab36bda47cf081 \|\| >=ab97f4b1c030750f2475bf4da8a9554d02206640 <1e96a00e0d3a00be6e4f368b2f18e2d345f813ce	43b4ecbc948a2e441804c9d7b772deb6b2e44e3d, c36d7f68f1c2e7e528ad11044a0bd6a3016a6a03, a6cfd0e4bb1e5f4dd2a67fa99eab36bda47cf081, 1e96a00e0d3a00be6e4f368b2f18e2d345f813ce
Linux/Linuxgeneric	6.10	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 43b4ecbc948a2e441804c9d7b772deb6b2e44e3d if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 26, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: xfs: don't walk off the end of a null sc->sa.agi_bp in AGI repair LOLLM noticed a longstanding bug where xrep_iunlink_walk_ondisk_bucket tries to walk ragi->sc->sa.agi_bp to rebuild the unlinked inode lists. Unfortunately, it's possible for agi_bp to be null if the buffer verifier fails, so we have to use ragi->agi_bp (which skips verifier checks) instead.

Quoted source text, attributed separately from HOL analysis.