CVE-2026-74687

Summary

In the Linux kernel, the following vulnerability has been resolved:

watchdog: at91sam9_wdt: prevent timer rearm during teardown

at91_ping() rearms the watchdog timer from its callback. timer_delete() neither waits for a running callback nor prevents it from rearming the timer, so probe failure or driver removal can leave the timer accessing the devm-allocated at91wdt after it has been freed.

Use timer_shutdown_sync() on both teardown paths. It waits for a running callback and rejects any attempt by the callback to rearm the timer.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux5161b31dc39a6d6dadc95f298de48a725b73ada8 < 29fe74c9aa69d78c1c6a3930f1d9fc5db71a6eedaffected
LinuxLinux5161b31dc39a6d6dadc95f298de48a725b73ada8 < b7949b0a7d998013b7ec8617a0ef5b07cca80be4affected
LinuxLinux5161b31dc39a6d6dadc95f298de48a725b73ada8 < 8444d66aa6b6e7fe0a26fa1a00a11cb4d0523783affected
LinuxLinux3.14affected
LinuxLinux0 < 3.14unaffected
LinuxLinux6.18.45 <= 6.18.*unaffected
LinuxLinux7.1.9 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References