Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: ptp: ocp: fix use-after-free bugs causing by ptp_ocp_watchdog The ptp_ocp_detach() only shuts down the watchdog timer if it is pending. However, if the timer handler is already running, the timer_delete_sync() is not called. This leads to race conditions where the devlink that contains the ptp_ocp is deallocated while the timer handler is still accessing it, resulting in use-after-free bugs. The following details one of the race scenarios. (thread 1) | (thread 2) ptp_ocp_remove() | ptp_ocp_detach() | ptp_ocp_watchdog() if (timer_pending(&bp->watchdog))| bp = timer_container_of() timer_delete_sync() | | devlink_free(devlink) //free | | bp-> //use Resolve this by unconditionally calling timer_delete_sync() to ensure the timer is reliably deactivated, preventing any access after free.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 773bda96492153e11d21eb63ac814669b51fc701 before e2a6eabe5304a789b7d40ce2576cd80154255e51; affected 773bda96492153e11d21eb63ac814669b51fc701 before aad70bdfc8244616e48c434310cab241a3f17781; affected 773bda96492153e11d21eb63ac814669b51fc701 before f10d3c7267ac7387a5129d5506c3c5f2460cfd9b; affected 773bda96492153e11d21eb63ac814669b51fc701 before 8bf935cf789872350b04c1a6468b0a509f67afb2 |
| Linux / Linux | affected 5.15; unaffected 0 before 5.15; unaffected 6.6.160 through 6.6.*; unaffected 6.12.114 through 6.12.*; unaffected 6.16.6 through 6.16.*; unaffected 6.17 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/e2a6eabe5304a789b7d40ce2576cd80154255e51
- https://git.kernel.org/stable/c/aad70bdfc8244616e48c434310cab241a3f17781
- https://git.kernel.org/stable/c/f10d3c7267ac7387a5129d5506c3c5f2460cfd9b
- https://git.kernel.org/stable/c/8bf935cf789872350b04c1a6468b0a509f67afb2
ADP enrichment
No English description supplied.
No references supplied.