VulnerabilityPublished 17 Sep 2026Updated 30 Oct 2026

CVE-2026-90264: Linux kernel · btrfs: always wait for ordered extents to avoid OE races

Source GCVE Database

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Authoritative record:CVE-2026-90264· High

Not known to be exploited · fixed in fa9f6e1958bb05b8a660d9cf2b6f51dee0077290 : patch Linux kernel soon.

Data as of 30 Oct 2026, 18:33 UTC

Severity

High

Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD

Thin evidence

One scorer or none

Patch: Available – fixed in fa9f6e1958bb05b8a660d9cf2b6f51dee0077290, ec78575dde998c21be7e0cb2503b5620f34b6255, de8f5cb3cb611f96909797b4b017831f5141cbbe +9

Exploitation evidence

Disclosed: evidence found.
CVE published 17 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 30 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.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), 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-wxhm-52wr-87x4

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected >=6.1.178 <6.1.191 >=6.6.145 <6.6.160 >=6.12.97 <6.12.114 >=6.18.40 <6.18.52 >=5.15.212 <5.16 >=7.1.4 <7.2	Fixed in fa9f6e1958bb05b8a660d9cf2b6f51dee0077290 ec78575dde998c21be7e0cb2503b5620f34b6255 de8f5cb3cb611f96909797b4b017831f5141cbbe aaac9b352f7f53f5d2f7e58e612d67d2a2bf7094 58ce50b1802a446d3b26df1b9c58be1ab8913d0e 043b6fd9706e4335851f317352d2717ad40e6d83 7.2 6.18.52 6.12.114 6.6.160 6.1.191 5.16
LinuxLinux	Affected =7.2	Fixed in–

AI-suggested

A fix for this vulnerability has been implemented in the Linux kernel by making the wait for ordered extents unconditional during buffered writes. Users should apply the official kernel updates that include this fix. No additional mitigation steps are indicated.

Description

CVE-2026-90264 is a vulnerability in the Linux kernel's btrfs filesystem where a race condition involving ordered extents (OEs) can cause kernel panic due to overlapping extents. This occurs because the kernel does not always wait for existing ordered extents to complete before inserting new ones, particularly when direct IO operations finish short and revert the file size (isize). The issue has been fixed by making the wait for ordered extents unconditional during buffered writes.

References

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