CVE - CVE-2021-47321

CVE-ID
CVE-2021-47321	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: watchdog: Fix possible use-after-free by calling del_timer_sync() This driver'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 del_timer_sync(), which makes sure the timer handler has finished, and unable to re-schedule itself.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/1a053c4d716898a53c2e31c574a70ea0c37044a3 URL:https://git.kernel.org/stable/c/1a053c4d716898a53c2e31c574a70ea0c37044a3 MISC:https://git.kernel.org/stable/c/4c05dac488a660fe2925c047ecb119e7afaaeb1e URL:https://git.kernel.org/stable/c/4c05dac488a660fe2925c047ecb119e7afaaeb1e MISC:https://git.kernel.org/stable/c/58606882ad8ec6c39e0f40344b922921ef94ab4d URL:https://git.kernel.org/stable/c/58606882ad8ec6c39e0f40344b922921ef94ab4d MISC:https://git.kernel.org/stable/c/66ba9cf929b1c4fabf545bd4c18f6f64e23e46e4 URL:https://git.kernel.org/stable/c/66ba9cf929b1c4fabf545bd4c18f6f64e23e46e4 MISC:https://git.kernel.org/stable/c/8bec568d7518b1504a602ed5376bb322e4dbb270 URL:https://git.kernel.org/stable/c/8bec568d7518b1504a602ed5376bb322e4dbb270 MISC:https://git.kernel.org/stable/c/ca96b8ea5e74956071154bdb456778cc3027e79f URL:https://git.kernel.org/stable/c/ca96b8ea5e74956071154bdb456778cc3027e79f MISC:https://git.kernel.org/stable/c/d0212f095ab56672f6f36aabc605bda205e1e0bf URL:https://git.kernel.org/stable/c/d0212f095ab56672f6f36aabc605bda205e1e0bf MISC:https://git.kernel.org/stable/c/db222f1477ad5692cd454709b714949807e5d111 URL:https://git.kernel.org/stable/c/db222f1477ad5692cd454709b714949807e5d111 MISC:https://git.kernel.org/stable/c/ecd620e0fb1ff7f78fdb593379b2e6938c99707a URL:https://git.kernel.org/stable/c/ecd620e0fb1ff7f78fdb593379b2e6938c99707a
Assigning CNA
kernel.org
Date Record Created
20240521	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240521)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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