https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Thu, 01 Oct 2026 11:38:00 +0000 https://vulnerability.circl.lu/vuln/cve-2022-49305 <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>drivers: staging: rtl8192u: Fix deadlock in ieee80211_beacons_stop()</p> <p>There is a deadlock in ieee80211_beacons_stop(), which is shown below:</p> <p>(Thread 1) | (Thread 2) | ieee80211_send_beacon() ieee80211_beacons_stop() | mod_timer() spin_lock_irqsave() //(1) | (wait a time) ... | ieee80211_send_beacon_cb() del_timer_sync() | spin_lock_irqsave() //(2) (wait timer to stop) | ...</p> <p>We hold ieee-&gt;beacon_lock in position (1) of thread 1 and use del_timer_sync() to wait timer to stop, but timer handler also need ieee-&gt;beacon_lock in position (2) of thread 2. As a result, ieee80211_beacons_stop() will block forever.</p> <p>This patch extracts del_timer_sync() from the protection of spin_lock_irqsave(), which could let timer handler to obtain the needed lock.</p> <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>drivers: staging: rtl8192u: Fix deadlock in ieee80211_beacons_stop()</p> <p>There is a deadlock in ieee80211_beacons_stop(), which is shown below:</p> <p>(Thread 1) | (Thread 2) | ieee80211_send_beacon() ieee80211_beacons_stop() | mod_timer() spin_lock_irqsave() //(1) | (wait a time) ... | ieee80211_send_beacon_cb() del_timer_sync() | spin_lock_irqsave() //(2) (wait timer to stop) | ...</p> <p>We hold ieee-&gt;beacon_lock in position (1) of thread 1 and use del_timer_sync() to wait timer to stop, but timer handler also need ieee-&gt;beacon_lock in position (2) of thread 2. As a result, ieee80211_beacons_stop() will block forever.</p> <p>This patch extracts del_timer_sync() from the protection of spin_lock_irqsave(), which could let timer handler to obtain the needed lock.</p> https://vulnerability.circl.lu/vuln/cve-2022-49305