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Back to active CVEs
Unknown severity · Source severity not reportedCVE-2026-98960

btrfs: don't stash io_uring encoded data across -EAGAINCVE-2026-98960

Answer in brief

CVE-2026-98960 records a Unknown severity vulnerability in btrfs: don't stash io_uring encoded data across -EAGAIN. 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 Oct 23, 2026Updated Oct 23, 2026Source checked Oct 25, 2026First seen by HOL Oct 23, 2026Material review Oct 23, 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>=34310c442e175f286b4c06ab5caa4e0b267ea31c <4d9c1e0a7fb2cfb1cc924acafc194d2c15c3e83e || >=34310c442e175f286b4c06ab5caa4e0b267ea31c <51562a8cb11628d3a5e105b4c347ec5473e5745f4d9c1e0a7fb2cfb1cc924acafc194d2c15c3e83e, 51562a8cb11628d3a5e105b4c347ec5473e5745f
Linux/Linuxgeneric6.13Not 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 4d9c1e0a7fb2cfb1cc924acafc194d2c15c3e83e if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 23, 2026

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

  2. Source modified

    Oct 23, 2026

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

  3. First seen by HOL

    Oct 23, 2026

Sources and claim methodology

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

In the Linux kernel, the following vulnerability has been resolved: btrfs: don't stash io_uring encoded data across -EAGAIN Returning -EAGAIN while leaving btrfs_uring_encoded_data in the cmd PDU leaks if the request is cancelled or the ring exits before reissue. io_uring does not free driver PDU allocations on cleanup. Write: io_queue_sqe() always issues with IO_URING_F_NONBLOCK first, so return -EAGAIN before allocating and free data on every exit. Read: free on nowait -EAGAIN too; only -EIOCBQUEUED keeps the allocation for btrfs_uring_read_finished().

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
CVE List V5
Source checked
Oct 25, 2026
References
2 linked sources
Open source record