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

Affected packages