What’s Vulnerable › Vulnerabilities

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

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-17 · updated 2026-10-30

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.

Affected products

• Linux: 2.6.30 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2cbcb0819c6367e1d5b0792a960594cc19576e23
• https://git.kernel.org/stable/c/3ffc4c9690c33ee28cdb3d0182b12f9c623e3acc
• https://git.kernel.org/stable/c/42a5661ff7e4c7d3c5025d0f8e5079fb5479ea49
• https://git.kernel.org/stable/c/74133e74619d108eeaaa787d78906314d7a7b077
• https://git.kernel.org/stable/c/c36816feff47f676dcc51919777d483f4146c1ee
• https://git.kernel.org/stable/c/d867db0a2602919510f346bc555f7b3093f6b6cc

Get alerted when CVE-2026-90421 or the next vulnerability affects your stack