CVE - CVE-2021-46937

CVE-ID
CVE-2021-46937	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: mm/damon/dbgfs: fix 'struct pid' leaks in 'dbgfs_target_ids_write()' DAMON debugfs interface increases the reference counts of 'struct pid's for targets from the 'target_ids' file write callback ('dbgfs_target_ids_write()'), but decreases the counts only in DAMON monitoring termination callback ('dbgfs_before_terminate()'). Therefore, when 'target_ids' file is repeatedly written without DAMON monitoring start/termination, the reference count is not decreased and therefore memory for the 'struct pid' cannot be freed. This commit fixes this issue by decreasing the reference counts when 'target_ids' is written.
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/ebb3f994dd92f8fb4d70c7541091216c1e10cb71 URL:https://git.kernel.org/stable/c/ebb3f994dd92f8fb4d70c7541091216c1e10cb71 MISC:https://git.kernel.org/stable/c/ffe4a1ba1a82c416a6b3a09d46594f6a885ae141 URL:https://git.kernel.org/stable/c/ffe4a1ba1a82c416a6b3a09d46594f6a885ae141
Assigning CNA
kernel.org
Date Record Created
20240225	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 (20240225)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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