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Back to active CVEs
Unknown severity · Source severity not reportedCVE-2026-43359

btrfs: fix transaction abort on set received ioctl due to item overflowCVE-2026-43359

Answer in brief

CVE-2026-43359 records a Unknown severity vulnerability in btrfs: fix transaction abort on set received ioctl due to item overflow. 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 Nov 6, 2026Source checked Nov 6, 2026First seen by HOL Nov 6, 2026Material review Nov 6, 2026
Upstream Advisory

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
CVE List V5
Source checked
Nov 6, 2026
References
6 linked sources
Open source record

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>=dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70 <b9914db13ac15aca3b74544c0bb1a2e0dad1f174 || >=dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70 <b19c0465e4daad5aa8f60552ea0578cf31a11b1e || >=dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70 <2e57b8cac2ba0d38aac76c1ecdfd8b899e3581a5 || >=dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70 <d11aefe654a04fc41996d254748d6a38b6b0a7be || >=dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70 <41fb97353ff58fa4f31904c343fc8e3df2f7517d || >=dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70 <87f2c46003fce4d739138aab4af1942b1afdadacb9914db13ac15aca3b74544c0bb1a2e0dad1f174, b19c0465e4daad5aa8f60552ea0578cf31a11b1e, 2e57b8cac2ba0d38aac76c1ecdfd8b899e3581a5, d11aefe654a04fc41996d254748d6a38b6b0a7be, 41fb97353ff58fa4f31904c343fc8e3df2f7517d, 87f2c46003fce4d739138aab4af1942b1afdadac
Linux/Linuxgeneric3.12Not 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 b9914db13ac15aca3b74544c0bb1a2e0dad1f174 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

    Nov 6, 2026

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

  3. First seen by HOL

    Nov 6, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • 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: fix transaction abort on set received ioctl due to item overflow If the set received ioctl fails due to an item overflow when attempting to add the BTRFS_UUID_KEY_RECEIVED_SUBVOL we have to abort the transaction since we did some metadata updates before. This means that if a user calls this ioctl with the same received UUID field for a lot of subvolumes, we will hit the overflow, trigger the transaction abort and turn the filesystem into RO mode. A malicious user could exploit this, and this ioctl does not even requires that a user has admin privileges (CAP_SYS_ADMIN), only that he/she owns the subvolume. Fix this by doing an early check for item overflow before starting a transaction. This is also race safe because we are holding the subvol_sem semaphore in exclusive (write) mode. A test case for fstests will follow soon.

Quoted source text, attributed separately from HOL analysis.