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CVE-2026-74687

HIGHCVSS 7.8/10EPSS 0.18%

Last modified

CVE-2026-74687 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. EPSS estimates a 0.18% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.18%

7.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 5161b31dc39a6d6dadc95f298de48a725b73ada8, < f96c18a766477e5f33d51697963a5c8aed260dae; >= 5161b31dc39a6d6dadc95f298de48a725b73ada8, < a9e0efcb1125e6b452c648671f15920c4955b681; >= 5161b31dc39a6d6dadc95f298de48a725b73ada8, < 1beb4dd6a30dea699e98990dd61f892ed1c0985e; >= 5161b31dc39a6d6dadc95f298de48a725b73ada8, < 29fe74c9aa69d78c1c6a3930f1d9fc5db71a6eed; >= 5161b31dc39a6d6dadc95f298de48a725b73ada8, < b7949b0a7d998013b7ec8617a0ef5b07cca80be4; >= 5161b31dc39a6d6dadc95f298de48a725b73ada8, < 8444d66aa6b6e7fe0a26fa1a00a11cb4d0523783
LinuxLinux3.14

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-74687?
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.
How severe is CVE-2026-74687?
CVE-2026-74687 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.
How do I fix CVE-2026-74687?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST