CVE - CVE-2022-49080

CVE-ID
CVE-2022-49080	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/mempolicy: fix mpol_new leak in shared_policy_replace If mpol_new is allocated but not used in restart loop, mpol_new will be freed via mpol_put before returning to the caller. But refcnt is not initialized yet, so mpol_put could not do the right things and might leak the unused mpol_new. This would happen if mempolicy was updated on the shared shmem file while the sp->lock has been dropped during the memory allocation. This issue could be triggered easily with the below code snippet if there are many processes doing the below work at the same time: shmid = shmget((key_t)5566, 1024 * PAGE_SIZE, 0666\|IPC_CREAT); shm = shmat(shmid, 0, 0); loop many times { mbind(shm, 1024 * PAGE_SIZE, MPOL_LOCAL, mask, maxnode, 0); mbind(shm + 128 * PAGE_SIZE, 128 * PAGE_SIZE, MPOL_DEFAULT, mask, maxnode, 0); }
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/198932a14aeb19a15cf19e51e151d023bc4cd648 URL:https://git.kernel.org/stable/c/198932a14aeb19a15cf19e51e151d023bc4cd648 MISC:https://git.kernel.org/stable/c/25f506273b6ae806fd46bfcb6fdaa5b9ec81a05b URL:https://git.kernel.org/stable/c/25f506273b6ae806fd46bfcb6fdaa5b9ec81a05b MISC:https://git.kernel.org/stable/c/39a32f3c06f6d68a530bf9612afa19f50f12e93d URL:https://git.kernel.org/stable/c/39a32f3c06f6d68a530bf9612afa19f50f12e93d MISC:https://git.kernel.org/stable/c/4ad099559b00ac01c3726e5c95dc3108ef47d03e URL:https://git.kernel.org/stable/c/4ad099559b00ac01c3726e5c95dc3108ef47d03e MISC:https://git.kernel.org/stable/c/5e16dc5378abd749a836daa9ee4ab2c8d2668999 URL:https://git.kernel.org/stable/c/5e16dc5378abd749a836daa9ee4ab2c8d2668999 MISC:https://git.kernel.org/stable/c/6e00309ac716fa8225f0cbde2cd9c24f0e74ee21 URL:https://git.kernel.org/stable/c/6e00309ac716fa8225f0cbde2cd9c24f0e74ee21 MISC:https://git.kernel.org/stable/c/8510c2346d9e47a72b7f018a36ef0c39483e53d6 URL:https://git.kernel.org/stable/c/8510c2346d9e47a72b7f018a36ef0c39483e53d6 MISC:https://git.kernel.org/stable/c/f7e183b0a7136b6dc9c7b9b2a85a608a8feba894 URL:https://git.kernel.org/stable/c/f7e183b0a7136b6dc9c7b9b2a85a608a8feba894 MISC:https://git.kernel.org/stable/c/fe39ac59dbbf893b73b24e3184161d0bd06d6651 URL:https://git.kernel.org/stable/c/fe39ac59dbbf893b73b24e3184161d0bd06d6651
Assigning CNA
kernel.org
Date Record Created
20250226	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 (20250226)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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