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Back to active CVEs
Unknown severity · Source severity not reportedCVE-2026-43308

btrfs: don't BUG() on unexpected delayed ref type in run_one_delayed_ref()CVE-2026-43308

Answer in brief

CVE-2026-43308 records a Unknown severity vulnerability in btrfs: don't BUG() on unexpected delayed ref type in run_one_delayed_ref(). 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 May 8, 2026Updated Oct 15, 2026Source checked Oct 15, 2026First seen by HOL Oct 15, 2026Material review Oct 15, 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
PackageAffected rangeFixed version
Linux/Linuxgeneric>=5d4f98a28c7d334091c1b7744f48a1acdd2a4ae0 <6ad4caadc6343c3d7987bf3211f15d66135c4c42 || >=5d4f98a28c7d334091c1b7744f48a1acdd2a4ae0 <5549743e11c06da23cfa7712a994b9f1e69064c6 || >=5d4f98a28c7d334091c1b7744f48a1acdd2a4ae0 <c7d1d4ff56744074e005771aff193b927392d51f6ad4caadc6343c3d7987bf3211f15d66135c4c42, 5549743e11c06da23cfa7712a994b9f1e69064c6, c7d1d4ff56744074e005771aff193b927392d51f
Linux/Linuxgeneric2.6.31Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to 6ad4caadc6343c3d7987bf3211f15d66135c4c42 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    May 8, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 15, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 15, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
Upstream source description

In the Linux kernel, the following vulnerability has been resolved: btrfs: don't BUG() on unexpected delayed ref type in run_one_delayed_ref() There is no need to BUG(), we can just return an error and log an error message.

Quoted source text, attributed separately from HOL analysis.

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Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
CVE List V5
Source checked
Oct 15, 2026
References
3 linked sources
Open source record