PCI: dwc: Avoid dwc_pcie_rasdes_debugfs_deinit() NULL dereference when no RAS DES capability

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Summary

CVECVE-2026-80621
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-28 08:16:46 UTC
Updated2026-08-28 08:16:46 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: PCI: dwc: Avoid dwc_pcie_rasdes_debugfs_deinit() NULL dereference when no RAS DES capability dwc_pcie_rasdes_debugfs_init() returns success when the controller has no RAS DES capability, leaving pci->debugfs->rasdes_info unset. The common debugfs teardown path still calls dwc_pcie_rasdes_debugfs_deinit(), which dereferences rasdes_info unconditionally. Return early when no RAS DES state was allocated. In that case no RAS DES mutex was initialized, so there is nothing to destroy. [mani: reworded subject]

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 4fbfa17f9a075593281034f566ca79cbf4930c82 514b84b1bf30f75f32c2fa66734dc1a177abb73e git Not specified
CNA Linux Linux affected 4fbfa17f9a075593281034f566ca79cbf4930c82 855870e8c59b97fd424e8fa3543c9e289bb48fac git Not specified
CNA Linux Linux affected 4fbfa17f9a075593281034f566ca79cbf4930c82 26b67fa10ef84ea667942491b50e6261a45f098d git Not specified
CNA Linux Linux affected 6.15 Not specified
CNA Linux Linux unaffected 6.15 semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/26b67fa10ef84ea667942491b50e6261a45f098d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/514b84b1bf30f75f32c2fa66734dc1a177abb73e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/855870e8c59b97fd424e8fa3543c9e289bb48fac 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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