CVE-2024-50005

Summary

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

mac802154: Fix potential RCU dereference issue in mac802154_scan_worker

In the mac802154_scan_worker function, the scan_req->type field was accessed after the RCU read-side critical section was unlocked. According to RCU usage rules, this is illegal and can lead to unpredictable behavior, such as accessing memory that has been updated or causing use-after-free issues.

This possible bug was identified using a static analysis tool developed by myself, specifically designed to detect RCU-related issues.

To address this, the scan_req->type value is now stored in a local variable scan_req_type while still within the RCU read-side critical section. The scan_req_type is then used after the RCU lock is released, ensuring that the type value is safely accessed without violating RCU rules.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxe2c3e6f53a7a8a00ffeed127cfd1b397c3b016f8 < e676e4ea76bbe7f1156d8c326b9b6753849481c2affected
LinuxLinuxe2c3e6f53a7a8a00ffeed127cfd1b397c3b016f8 < 540138377b22f601f06f55ebfa3ca171dcab471aaffected
LinuxLinuxe2c3e6f53a7a8a00ffeed127cfd1b397c3b016f8 < d18f669461811dfe2915d5554ab2a9834f810013affected
LinuxLinuxe2c3e6f53a7a8a00ffeed127cfd1b397c3b016f8 < bff1709b3980bd7f80be6786f64cc9a9ee9e56daaffected
LinuxLinux6.5affected
LinuxLinux0 < 6.5unaffected
LinuxLinux6.6.55 <= 6.6.*unaffected
LinuxLinux6.10.14 <= 6.10.*unaffected
LinuxLinux6.11.3 <= 6.11.*unaffected
LinuxLinux6.12 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

References