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CVE-2026-74733

Unknown

Last modified

CVE-2026-74733 is a vulnerability of currently unknown severity. In 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.

Description

In 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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= bfc6444b57dc7186b6acc964705d7516cbaf3904, < e6a2f5f845f50b0c4299bace5111f56d3390a090; >= bfc6444b57dc7186b6acc964705d7516cbaf3904, < 9dc325327babe7f159e84cbe9380a45342da0585; 58a5c93bd1a6e949267400080f07e57ffe05ec34; e2ecdddca80dd845df42376e4b0197fe97018ba2; de7cffa53149c7b48bd1bb29b02390c9f05b7f41; >= 6.1.101, < 6.2; >= 6.6.42, < 6.7; >= 6.9.11, < 6.10
LinuxLinux6.10

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-74733?
In 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.
How severe is CVE-2026-74733?
Severity scoring for CVE-2026-74733 is pending analysis.
How do I fix CVE-2026-74733?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST