CVE-2024-42253: gpio: pca953x: fix pca953x_irq_bus_sync_unlock race
First published: Thu Aug 08 2024(Updated: )
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
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <6.1.101 | |
| Linux Linux kernel | >=6.2<6.6.42 | |
| Linux Linux kernel | >=6.7<6.9.11 | |
| Linux Linux kernel | =6.10-rc1 | |
| Linux Linux kernel | =6.10-rc2 | |
| Linux Linux kernel | =6.10-rc3 | |
| Linux Linux kernel | =6.10-rc4 | |
| Linux Linux kernel | =6.10-rc5 | |
| debian/linux | <=5.10.223-1<=5.10.226-1 | 6.1.115-1 6.1.112-1 6.11.7-1 6.11.9-1 |
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Reference Links
- https://git.kernel.org/stable/c/58a5c93bd1a6e949267400080f07e57ffe05ec34
- https://git.kernel.org/stable/c/bfc6444b57dc7186b6acc964705d7516cbaf3904
- https://git.kernel.org/stable/c/de7cffa53149c7b48bd1bb29b02390c9f05b7f41
- https://git.kernel.org/stable/c/e2ecdddca80dd845df42376e4b0197fe97018ba2
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-42253
- https://nvd.nist.gov/vuln/detail/CVE-2024-42253
- https://launchpad.net/bugs/cve/CVE-2024-42253
- https://security-tracker.debian.org/tracker/CVE-2024-42253
- https://ubuntu.com/security/CVE-2024-42253
- https://git.kernel.org/linus/bfc6444b57dc7186b6acc964705d7516cbaf3904
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