In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: cancel pmsr_free_wk in cfg80211_pmsr_wdev_down When the nl80211 socket that originated a PMSR request is closed, cfg80211_release_pmsr() sets the request's nl_portid to zero and schedules pmsr_free_wk to process the abort asynchronously. If the interface is concurrently torn down before that work runs, cfg80211_pmsr_wdev_down() calls cfg80211_pmsr_process_abort() directly. However, the already- scheduled pmsr_free_wk work item remains pending and may run after the interface has been removed from the driver. This could cause the driver's abort_pmsr callback to operate on a torn-down interface, leading to undefined behavior and potential crashes. Cancel pmsr_free_wk synchronously in cfg80211_pmsr_wdev_down() before calling cfg80211_pmsr_process_abort(). This ensures any pending or in-progress work is drained before interface teardown proceeds, preventing the work from invoking the driver abort callback after the interface is gone.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | 9bb7e0f24e7e7d00daa1219b14539e2e602649b2, 9bb7e0f24e7e7d00daa1219b14539e2e602649b2, 9bb7e0f24e7e7d00daa1219b14539e2e602649b2, 9bb7e0f24e7e7d00daa1219b14539e2e602649b2, 9bb7e0f24e7e7d00daa1219b14539e2e602649b2, 9bb7e0f24e7e7d00daa1219b14539e2e602649b2, 5.0 |
Downstream vendors/products affected by this vulnerability
| Vendor | Product | Source | Confidence |
|---|---|---|---|
| linux | linux | mitre_affected | 90% |
Updated severity to CRITICAL, added new affected versions, and noted that no exploit is available.
Initial creation
