CVE-2022-49080

Advisory lineage Upstream: 0 Downstream: 31
Analyzed
Published: 26 Feb 2025, 01:54
Last modified:11 May 2026, 18:52

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
<0.01% LOW
0% probability -0.02%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

26 Feb 2025, 01:54
Published
Vulnerability first disclosed
11 May 2026, 18:52
Last Modified
Vulnerability information updated

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); }

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.01%• Percentile: 1%

Techniques & Countermeasures

  • CWE-401•Missing Release of Memory after Effective Lifetime

    The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

Affected Systems

  • linux•linux

    ≥ 42288fe366c4f1ce7522bc9f27d0bc2a81c55264, < 8510c2346d9e47a72b7f018a36ef0c39483e53d6 | ≥ 42288fe366c4f1ce7522bc9f27d0bc2a81c55264, < 5e16dc5378abd749a836daa9ee4ab2c8d2668999 | ≥ 42288fe366c4f1ce7522bc9f27d0bc2a81c55264, < 39a32f3c06f6d68a530bf9612afa19f50f12e93d | ≥ 42288fe366c4f1ce7522bc9f27d0bc2a81c55264, < 25f506273b6ae806fd46bfcb6fdaa5b9ec81a05b | ≥ 42288fe366c4f1ce7522bc9f27d0bc2a81c55264, < f7e183b0a7136b6dc9c7b9b2a85a608a8feba894 | ≥ 42288fe366c4f1ce7522bc9f27d0bc2a81c55264, < 198932a14aeb19a15cf19e51e151d023bc4cd648 | ≥ 42288fe366c4f1ce7522bc9f27d0bc2a81c55264, < 6e00309ac716fa8225f0cbde2cd9c24f0e74ee21 | ≥ 42288fe366c4f1ce7522bc9f27d0bc2a81c55264, < fe39ac59dbbf893b73b24e3184161d0bd06d6651 | ≥ 42288fe366c4f1ce7522bc9f27d0bc2a81c55264, < 4ad099559b00ac01c3726e5c95dc3108ef47d03e | 3.8

  • linux•linux_kernel

    ≥ 3.8.1, < 4.9.311 | ≥ 4.10, < 4.14.276 | ≥ 4.15, < 4.19.238 | ≥ 4.20, < 5.4.189 | ≥ 5.5, < 5.10.111 | ≥ 5.11, < 5.15.34 | ≥ 5.16, < 5.16.20 | ≥ 5.17, < 5.17.3 | 3.8 | 3.8:rc2 | 3.8:rc3 | 3.8:rc4 | 3.8:rc5 | 3.8:rc6 | 3.8:rc7 | 5.18:rc1

References (9)