CVE-2021-47323

Source
https://nvd.nist.gov/vuln/detail/CVE-2021-47323
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-47323.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2021-47323
Downstream
Related
Published
2024-05-21T15:15:19Z
Modified
2025-08-09T20:01:26Z
Summary
[none]
Details

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

watchdog: sc520wdt: Fix possible use-after-free in wdtturnoff()

This module's remove path calls del_timer(). However, that function does not wait until the timer handler finishes. This means that the timer handler may still be running after the driver's remove function has finished, which would result in a use-after-free.

Fix by calling deltimersync(), which makes sure the timer handler has finished, and unable to re-schedule itself.

References

Affected packages