VulnerabilityPublished 23 Oct 2026

CVE-2026-98962: Linux kernel · btrfs: free iov when btrfs_uring_read_extent() fails

Source GCVE Database

Authoritative record:CVE-2026-98962· Low

Not known to be exploited · fixed in a8ea92830b3e0e163d4e829bdcb17ca83c0f951c : update Linux kernel when convenient.

Data as of 26 Oct 2026, 17:16 UTC

Severity

Low

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in a8ea92830b3e0e163d4e829bdcb17ca83c0f951c, 578ef517142420cf9d36b364ad4b3490b85469fb, 7a3addbdc5ad1fd80541a6a4ff4e06cd1331530a

Exploitation evidence

Disclosed: evidence found.
CVE published 23 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-g5c9-4h34-4hwf

What to do

Upgrade Linux kernel to a8ea92830b3e0e163d4e829bdcb17ca83c0f951c, 578ef517142420cf9d36b364ad4b3490b85469fb or 7a3addbdc5ad1fd80541a6a4ff4e06cd1331530a.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 34310c442e175f286b4c06ab5caa4e0b267ea31c, < a8ea92830b3e0e163d4e829bdcb17ca83c0f951c	Fixed in a8ea92830b3e0e163d4e829bdcb17ca83c0f951c
LinuxLinux	Affected ≥ 34310c442e175f286b4c06ab5caa4e0b267ea31c, < 578ef517142420cf9d36b364ad4b3490b85469fb	Fixed in 578ef517142420cf9d36b364ad4b3490b85469fb
LinuxLinux	Affected ≥ 34310c442e175f286b4c06ab5caa4e0b267ea31c, < 7a3addbdc5ad1fd80541a6a4ff4e06cd1331530a	Fixed in 7a3addbdc5ad1fd80541a6a4ff4e06cd1331530a
LinuxLinux	Affected =6.13	Fixed in–

AI-suggested

A fix for this vulnerability has been implemented in the Linux kernel. Users should update to the fixed kernel version once it is released. Since this is a kernel-level fix, applying the official kernel update from the Linux distribution vendor is the recommended remediation. No additional mitigation steps are indicated.

Description

A vulnerability in the Linux kernel's btrfs subsystem related to improper freeing of iov memory when the function btrfs_uring_read_extent() fails has been resolved. The issue was that on failure, the caller skipped freeing the iov memory except in a specific error case (-EIOCBQUEUED), potentially causing a memory leak. The fix ensures that on failure, the code correctly frees the iov memory by falling through to the appropriate cleanup path.

References

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