VulnerabilityPublished 17 Sep 2026Updated 21 Oct 2026

CVE-2026-90421: Linux kernel · PCI: Fix UAF when probe runs concurrent to dyn ID removal

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in d867db0a2602919510f346bc555f7b3093f6b6cc : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:47 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.2% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in d867db0a2602919510f346bc555f7b3093f6b6cc, c36816feff47f676dcc51919777d483f4146c1ee, 42a5661ff7e4c7d3c5025d0f8e5079fb5479ea49 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 17 Sep 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 ≥ 0994375e9614f78657031e04e30019b9cdb62795, < d867db0a2602919510f346bc555f7b3093f6b6cc	Fixed in d867db0a2602919510f346bc555f7b3093f6b6cc
LinuxLinux	Affected ≥ 0994375e9614f78657031e04e30019b9cdb62795, < c36816feff47f676dcc51919777d483f4146c1ee	Fixed in c36816feff47f676dcc51919777d483f4146c1ee
LinuxLinux	Affected ≥ 0994375e9614f78657031e04e30019b9cdb62795, < 42a5661ff7e4c7d3c5025d0f8e5079fb5479ea49	Fixed in 42a5661ff7e4c7d3c5025d0f8e5079fb5479ea49
LinuxLinux	Affected ≥ 0994375e9614f78657031e04e30019b9cdb62795, < 3ffc4c9690c33ee28cdb3d0182b12f9c623e3acc	Fixed in 3ffc4c9690c33ee28cdb3d0182b12f9c623e3acc
LinuxLinux	Affected ≥ 0994375e9614f78657031e04e30019b9cdb62795, < 2cbcb0819c6367e1d5b0792a960594cc19576e23	Fixed in 2cbcb0819c6367e1d5b0792a960594cc19576e23
LinuxLinux	Affected =2.6.30	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: PCI: Fix UAF when probe runs concurrent to dyn ID removal Dynamic IDs are only guaranteed to be valid when dynids.lock is held, as remove_id_store() can free the node. Thus, make a copy in pci_match_device(). Also, clarify that the id parameter is only valid during probe.

References

Community reviews

Loading reviews…