irqchip/renesas-irqc: Fix generic interrupt chip leak on remove

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-93072
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 17:18:01 UTC
Updated2026-09-17 17:18:01 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: irqchip/renesas-irqc: Fix generic interrupt chip leak on remove The driver allocates domain generic chips probe. However, on driver removal, the generic chips are not automatically freed when the interrupt domain is removed because the domain flags do not include IRQ_DOMAIN_FLAG_DESTROY_GC. This causes both the domain generic chips structure and the associated generic chips to be leaked. Additionally, the generic chips remain on the global list and may later be accessed by generic interrupt chip suspend, resume, or shutdown callbacks after the driver has been removed, potentially resulting in a use-after-free and kernel crash. Fix the resource leak by setting IRQ_DOMAIN_FLAG_DESTROY_GC on the interrupt domain; this lets the interrupt domain core automatically release all generic chips when irq_domain_remove() is invoked, removing the need for manual cleanup calls in error paths and remove callback.

Risk And Classification

EPSS: 0.002000000 probability, percentile 0.102110000 (date 2026-09-18)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 99c221df33fbfa1b30e15dee879eb0a9ae1be353 3d39757ef791f90028da9c8b7c1fbbb497237e58 git Not specified
CNA Linux Linux affected 99c221df33fbfa1b30e15dee879eb0a9ae1be353 4bf7614d048434326081eef0ebef33cb77fe2ffc git Not specified
CNA Linux Linux affected 99c221df33fbfa1b30e15dee879eb0a9ae1be353 9acc996cb2e8477ae81bd7c067fec15202d6bc89 git Not specified
CNA Linux Linux affected 99c221df33fbfa1b30e15dee879eb0a9ae1be353 7c614f83301d464e2fb498d63552490d137ea10d git Not specified
CNA Linux Linux affected 99c221df33fbfa1b30e15dee879eb0a9ae1be353 616dd89d81ad9a3cf1cfff4088a4c43e4e00d6ba git Not specified
CNA Linux Linux affected 4.4 Not specified
CNA Linux Linux unaffected 4.4 semver Not specified
CNA Linux Linux unaffected 6.6.157 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.110 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.52 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.6 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/9acc996cb2e8477ae81bd7c067fec15202d6bc89 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3d39757ef791f90028da9c8b7c1fbbb497237e58 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4bf7614d048434326081eef0ebef33cb77fe2ffc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7c614f83301d464e2fb498d63552490d137ea10d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/616dd89d81ad9a3cf1cfff4088a4c43e4e00d6ba 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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