Riskcovery

CVE-2024-50005

mac802154: Fix potential RCU dereference issue in mac802154_scan_worker

State
Published
Severity
Not scored
Published
Oct 21, 2024
Updated
May 11, 2026
Reserved
Oct 21, 2024

Read the record on cve.org

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • e2c3e6f53a7a8a00ffeed127cfd1b397c3b016f8 to before e676e4ea76bbe7f1156d8c326b9b6753849481c2Affected
  • e2c3e6f53a7a8a00ffeed127cfd1b397c3b016f8 to before 540138377b22f601f06f55ebfa3ca171dcab471aAffected
  • e2c3e6f53a7a8a00ffeed127cfd1b397c3b016f8 to before d18f669461811dfe2915d5554ab2a9834f810013Affected
  • e2c3e6f53a7a8a00ffeed127cfd1b397c3b016f8 to before bff1709b3980bd7f80be6786f64cc9a9ee9e56daAffected
LinuxLinux
  • 6.5Affected
  • before 6.5Not affected
  • 6.6.55 through 6.6.*Not affected
  • 6.10.14 through 6.10.*Not affected
  • 6.11.3 through 6.11.*Not affected
  • 6.12 and laterNot affected

References

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