VulnerabilityPublished 15 Aug 2026Updated 21 Oct 2026

CVE-2026-74273: Linux kernel · cxl/region: Block region delete during region creation

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in ecc86a28dc27509da511bb3f8c309750233e3177 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 17:30 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 ecc86a28dc27509da511bb3f8c309750233e3177, d91feb88692e81b00cd22f0125cfcd04970b4a0b, b0b6a9c65cb72c901fdcc6ae83d7afd70cdca1b8 +2

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 to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ a32320b71f085f8d82afedcf285f1682c8c00aed, < ecc86a28dc27509da511bb3f8c309750233e3177	Fixed in ecc86a28dc27509da511bb3f8c309750233e3177
LinuxLinux	Affected ≥ a32320b71f085f8d82afedcf285f1682c8c00aed, < d91feb88692e81b00cd22f0125cfcd04970b4a0b	Fixed in d91feb88692e81b00cd22f0125cfcd04970b4a0b
LinuxLinux	Affected ≥ a32320b71f085f8d82afedcf285f1682c8c00aed, < b0b6a9c65cb72c901fdcc6ae83d7afd70cdca1b8	Fixed in b0b6a9c65cb72c901fdcc6ae83d7afd70cdca1b8
LinuxLinux	Affected ≥ a32320b71f085f8d82afedcf285f1682c8c00aed, < 98c7e206af48b4433b2192cc1a538db2acc49876	Fixed in 98c7e206af48b4433b2192cc1a538db2acc49876
LinuxLinux	Affected ≥ a32320b71f085f8d82afedcf285f1682c8c00aed, < 8efa9fcc1d31b29b31e0ac4efe48624a729796bc	Fixed in 8efa9fcc1d31b29b31e0ac4efe48624a729796bc
LinuxLinux	Affected =6.3	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: cxl/region: Block region delete during region creation Expand the range lock, rename it "regions_lock", to disable region deletion in the critical period between construct_region() and attach_target(), as well as the period between device_add() and registering the remove actions. Otherwise, userspace can confuse the kernel. It can violate the assumption the region stays registered through the completion of cxl_add_to_region(). It can violate the assumption that devm_add_action_or_reset() is working with a live 'struct cxl_region'. It is ok for the region to disappear outside of those windows as that mirrors device hotplug flows where the proper locks are held.

References

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