CVE - CVE-2021-47294

CVE-ID
CVE-2021-47294	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: netrom: Decrease sock refcount when sock timers expire Commit 63346650c1a9 ("netrom: switch to sock timer API") switched to use sock timer API. It replaces mod_timer() by sk_reset_timer(), and del_timer() by sk_stop_timer(). Function sk_reset_timer() will increase the refcount of sock if it is called on an inactive timer, hence, in case the timer expires, we need to decrease the refcount ourselves in the handler, otherwise, the sock refcount will be unbalanced and the sock will never be freed.
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/25df44e90ff5959b5c24ad361b648504a7e39ef3 URL:https://git.kernel.org/stable/c/25df44e90ff5959b5c24ad361b648504a7e39ef3 MISC:https://git.kernel.org/stable/c/48866fd5c361ea417ed24b43fc2a7dc2f5b060ef URL:https://git.kernel.org/stable/c/48866fd5c361ea417ed24b43fc2a7dc2f5b060ef MISC:https://git.kernel.org/stable/c/517a16b1a88bdb6b530f48d5d153478b2552d9a8 URL:https://git.kernel.org/stable/c/517a16b1a88bdb6b530f48d5d153478b2552d9a8 MISC:https://git.kernel.org/stable/c/6811744bd0efb9e472cb15d066cdb460beb8cb8a URL:https://git.kernel.org/stable/c/6811744bd0efb9e472cb15d066cdb460beb8cb8a MISC:https://git.kernel.org/stable/c/853262355518cd1247515b74e83fabf038aa6c29 URL:https://git.kernel.org/stable/c/853262355518cd1247515b74e83fabf038aa6c29 MISC:https://git.kernel.org/stable/c/9619cc7d97c3aa8ed3cfd2b8678b74fb6d6c7950 URL:https://git.kernel.org/stable/c/9619cc7d97c3aa8ed3cfd2b8678b74fb6d6c7950 MISC:https://git.kernel.org/stable/c/a01634bf91f2b6c42583770eb6815fb6d1e251cf URL:https://git.kernel.org/stable/c/a01634bf91f2b6c42583770eb6815fb6d1e251cf MISC:https://git.kernel.org/stable/c/bc1660206c3723c37ed4d622ad81781f1e987250 URL:https://git.kernel.org/stable/c/bc1660206c3723c37ed4d622ad81781f1e987250
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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