CVE-2024-42253
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2024-42253
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-42253.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2024-42253
- Downstream
- Related
- Published
- 2024-08-08T09:15:08Z
- Modified
- 2025-08-09T19:01:28Z
- Severity
-
- 4.7 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
gpio: pca953x: fix pca953xirqbussyncunlock race
Ensure that `i2clock' is held when setting interrupt latch and mask in pca953xirqbussync_unlock() in order to avoid races.
The other (non-probe) call site pca953xgpiosetmultiple() ensures the lock is held before calling pca953xwrite_regs().
The problem occurred when a request raced against irqbussync_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
- References