VulnerabilityPublished 15 Aug 2026Updated 21 Oct 2026

CVE-2026-74272: Linux kernel · cxl/region: Resolve region deletion races

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in c478810c4ce7216261fc1b6ca5180adcda26b1a1 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 17:16 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in c478810c4ce7216261fc1b6ca5180adcda26b1a1, be44c1c04f85d7b7ac1c597a30b443bbd346acbd, 441250eea84608c6c2dbd7f00c61df32836ac97d +1

Exploitation evidence

Disclosed: evidence found.
CVE published 15 Aug 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.

What to do

Upgrade Linux kernel to c478810c4ce7216261fc1b6ca5180adcda26b1a1, be44c1c04f85d7b7ac1c597a30b443bbd346acbd, 441250eea84608c6c2dbd7f00c61df32836ac97d or 4dd86ca99ffcc413cbf79063fd9956ef54e0ca91.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 779dd20cfb56c510f89877cca45529fa9f8bc450, < c478810c4ce7216261fc1b6ca5180adcda26b1a1	Fixed in c478810c4ce7216261fc1b6ca5180adcda26b1a1
LinuxLinux	Affected ≥ 779dd20cfb56c510f89877cca45529fa9f8bc450, < be44c1c04f85d7b7ac1c597a30b443bbd346acbd	Fixed in be44c1c04f85d7b7ac1c597a30b443bbd346acbd
LinuxLinux	Affected ≥ 779dd20cfb56c510f89877cca45529fa9f8bc450, < 441250eea84608c6c2dbd7f00c61df32836ac97d	Fixed in 441250eea84608c6c2dbd7f00c61df32836ac97d
LinuxLinux	Affected ≥ 779dd20cfb56c510f89877cca45529fa9f8bc450, < 4dd86ca99ffcc413cbf79063fd9956ef54e0ca91	Fixed in 4dd86ca99ffcc413cbf79063fd9956ef54e0ca91
LinuxLinux	Affected =6.0	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: cxl/region: Resolve region deletion races Sungwoo noticed that the sysfs trigger to delete a region may try to delete a region multiple times. It also has no exclusion relative to the kernel releasing the region via CXL root device teardown. Instead of installing new cxl root devres actions per region, use the existing root decoder unregistration event to remove all remaining regions. An xarray of regions replaces a devres list of regions. This handles 3 separate issues with the old approach: 1/ sysfs users racing to delete the same region: no longer possible now that the regions_lock is held over the lookup and deletion. 2/ multiple actions triggering deletion of the same region: solved by erasing regions while holding @regions_lock, and only proceeding on successful erasure. 3/ userspace racing devres_release_all() to trigger the devres not found warning: solved by sysfs unregistration not requiring a release action

References

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