CVE-2024-36932

Summary

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

thermal/debugfs: Prevent use-after-free from occurring after cdev removal

Since thermal_debug_cdev_remove() does not run under cdev->lock, it can run in parallel with thermal_debug_cdev_state_update() and it may free the struct thermal_debugfs object used by the latter after it has been checked against NULL.

If that happens, thermal_debug_cdev_state_update() will access memory that has been freed already causing the kernel to crash.

Address this by using cdev->lock in thermal_debug_cdev_remove() around the cdev->debugfs value check (in case the same cdev is removed at the same time in two different threads) and its reset to NULL.

Cc :6.8+ <stable@vger.kernel.org> # 6.8+

Affected Software

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

• https://git.kernel.org/stable/c/c1279dee33369e2525f532364bb87207d23b9481
• https://git.kernel.org/stable/c/d351eb0ab04c3e8109895fc33250cebbce9c11da

References

• https://git.kernel.org/stable/c/c1279dee33369e2525f532364bb87207d23b9481
• https://git.kernel.org/stable/c/d351eb0ab04c3e8109895fc33250cebbce9c11da

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