CVE-2024-50187

Summary

In the Linux kernel, the following vulnerability has been resolved:

drm/vc4: Stop the active perfmon before being destroyed

Upon closing the file descriptor, the active performance monitor is not stopped. Although all perfmons are destroyed in vc4_perfmon_close_file(), the active performance monitor's pointer (vc4->active_perfmon) is still retained.

If we open a new file descriptor and submit a few jobs with performance monitors, the driver will attempt to stop the active performance monitor using the stale pointer in vc4->active_perfmon. However, this pointer is no longer valid because the previous process has already terminated, and all performance monitors associated with it have been destroyed and freed.

To fix this, when the active performance monitor belongs to a given process, explicitly stop it before destroying and freeing it.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux65101d8c9108201118efa7e08f4e2c57f438deb9 < 75452da51e2403e14be007df80d133e1443fc967affected
LinuxLinux65101d8c9108201118efa7e08f4e2c57f438deb9 < 937943c042503dc6087438bf3557f9057a588ba0affected
LinuxLinux65101d8c9108201118efa7e08f4e2c57f438deb9 < c9adba739d5f7cdc47a7754df4a17b47b1ecf513affected
LinuxLinux65101d8c9108201118efa7e08f4e2c57f438deb9 < 0b2ad4f6f2bec74a5287d96cb2325a5e11706f22affected
LinuxLinux4.17affected
LinuxLinux0 < 4.17unaffected
LinuxLinux6.1.113 <= 6.1.*unaffected
LinuxLinux6.6.57 <= 6.6.*unaffected
LinuxLinux6.11.4 <= 6.11.*unaffected
LinuxLinux6.12 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References