Bug 2536507 (CVE-2026-90421) - CVE-2026-90421 kernel: PCI: Fix UAF when probe runs concurrent to dyn ID removal
Summary: CVE-2026-90421 kernel: PCI: Fix UAF when probe runs concurrent to dyn ID removal
Keywords:
Status: NEW
Alias: CVE-2026-90421
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-17 18:14 UTC by OSIDB Bzimport
Modified: 2026-10-20 11:07 UTC (History)
17 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-09-17 18:14:46 UTC
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.


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