gpio: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74733
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-22 16:16:48 UTC
Updated2026-08-22 16:16:48 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: gpio: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock Locking is disabled in the regmap config as this driver uses its own lock. This means that all calls to regmap functions (read or write) must hold the i2c_lock. The function pca953x_irq_bus_sync_unlock() did not do this, and it was therefore possible that multiple threads could cause an incorrect register to be read/written. A previous patch partly fixed this, but only protected the write to the interrupt mask register, and not the read from the direction register.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected bfc6444b57dc7186b6acc964705d7516cbaf3904 e6a2f5f845f50b0c4299bace5111f56d3390a090 git Not specified
CNA Linux Linux affected bfc6444b57dc7186b6acc964705d7516cbaf3904 9dc325327babe7f159e84cbe9380a45342da0585 git Not specified
CNA Linux Linux affected 58a5c93bd1a6e949267400080f07e57ffe05ec34 git Not specified
CNA Linux Linux affected e2ecdddca80dd845df42376e4b0197fe97018ba2 git Not specified
CNA Linux Linux affected de7cffa53149c7b48bd1bb29b02390c9f05b7f41 git Not specified
CNA Linux Linux affected 6.1.101 6.2 semver Not specified
CNA Linux Linux affected 6.6.42 6.7 semver Not specified
CNA Linux Linux affected 6.9.11 6.10 semver Not specified
CNA Linux Linux affected 6.10 Not specified
CNA Linux Linux unaffected 6.10 semver Not specified
CNA Linux Linux unaffected 7.1.9 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/9dc325327babe7f159e84cbe9380a45342da0585 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e6a2f5f845f50b0c4299bace5111f56d3390a090 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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