CVE-2024-42253

gpio: pca953x: fix pca953x_irq_bus_sync_unlock race

Description

In the Linux kernel, the following vulnerability has been resolved: gpio: pca953x: fix pca953x_irq_bus_sync_unlock race Ensure that `i2c_lock' is held when setting interrupt latch and mask in pca953x_irq_bus_sync_unlock() in order to avoid races. The other (non-probe) call site pca953x_gpio_set_multiple() ensures the lock is held before calling pca953x_write_regs(). The problem occurred when a request raced against irq_bus_sync_unlock() approximately once per thousand reboots on an i.MX8MP based system. * Normal case 0-0022: write register AI|3a {03,02,00,00,01} Input latch P0 0-0022: write register AI|49 {fc,fd,ff,ff,fe} Interrupt mask P0 0-0022: write register AI|08 {ff,00,00,00,00} Output P3 0-0022: write register AI|12 {fc,00,00,00,00} Config P3 * Race case 0-0022: write register AI|08 {ff,00,00,00,00} Output P3 0-0022: write register AI|08 {03,02,00,00,01} *** Wrong register *** 0-0022: write register AI|12 {fc,00,00,00,00} Config P3 0-0022: write register AI|49 {fc,fd,ff,ff,fe} Interrupt mask P0

Category

4.7
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.03%
Affected: Linux Linux
Affected: Linux Linux
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/stable/c/58a5c93bd1a6e949267400080f07e57ffe05ec34 patch
https://git.kernel.org/stable/c/e2ecdddca80dd845df42376e4b0197fe97018ba2 patch
https://git.kernel.org/stable/c/de7cffa53149c7b48bd1bb29b02390c9f05b7f41 patch
https://git.kernel.org/stable/c/bfc6444b57dc7186b6acc964705d7516cbaf3904 patch

Frequently Asked Questions

What is the severity of CVE-2024-42253?
CVE-2024-42253 has been scored as a medium severity vulnerability.
How to fix CVE-2024-42253?
To fix CVE-2024-42253, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-42253 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2024-42253 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-42253?
CVE-2024-42253 affects Linux Linux, Linux Linux.
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