https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Tue, 29 Sep 2026 02:49:39 +0000 https://vulnerability.circl.lu/vuln/cve-2025-39859 <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>ptp: ocp: fix use-after-free bugs causing by ptp_ocp_watchdog</p> <p>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.</p> <p>(thread 1) | (thread 2) ptp_ocp_remove() | ptp_ocp_detach() | ptp_ocp_watchdog() if (timer_pending(&amp;bp-&gt;watchdog))| bp = timer_container_of() timer_delete_sync() | | devlink_free(devlink) //free | | bp-&gt; //use</p> <p>Resolve this by unconditionally calling timer_delete_sync() to ensure the timer is reliably deactivated, preventing any access after free.</p> <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>ptp: ocp: fix use-after-free bugs causing by ptp_ocp_watchdog</p> <p>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.</p> <p>(thread 1) | (thread 2) ptp_ocp_remove() | ptp_ocp_detach() | ptp_ocp_watchdog() if (timer_pending(&amp;bp-&gt;watchdog))| bp = timer_container_of() timer_delete_sync() | | devlink_free(devlink) //free | | bp-&gt; //use</p> <p>Resolve this by unconditionally calling timer_delete_sync() to ensure the timer is reliably deactivated, preventing any access after free.</p> https://vulnerability.circl.lu/vuln/cve-2025-39859