CVE-2022-49080
mm/mempolicy: fix mpol_new leak in shared_policy_replace
At a glance
- Source
- NVD
- EPSS
- EPSS 0.31 % · percentile 24 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Analyzed
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); }
Weaknesses (CWE)
- CWE-401 — Missing Release of Memory after Effective Lifetime
References
- https://git.kernel.org/stable/c/8510c2346d9e47a72b7f018a36ef0c39483e53d6
- https://git.kernel.org/stable/c/5e16dc5378abd749a836daa9ee4ab2c8d2668999
- https://git.kernel.org/stable/c/39a32f3c06f6d68a530bf9612afa19f50f12e93d
- https://git.kernel.org/stable/c/25f506273b6ae806fd46bfcb6fdaa5b9ec81a05b
- https://git.kernel.org/stable/c/f7e183b0a7136b6dc9c7b9b2a85a608a8feba894
- https://git.kernel.org/stable/c/198932a14aeb19a15cf19e51e151d023bc4cd648
- https://git.kernel.org/stable/c/6e00309ac716fa8225f0cbde2cd9c24f0e74ee21
- https://git.kernel.org/stable/c/fe39ac59dbbf893b73b24e3184161d0bd06d6651
- https://git.kernel.org/stable/c/4ad099559b00ac01c3726e5c95dc3108ef47d03e
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2022-55124
- GCVE · GCVE-0-2022-49080
CERT-FR advisories
- CERTFR-2025-AVI-1057 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2025-AVI-1032 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0529 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0509 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0234 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0212 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 3.8.1 < 4.9.311cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.10 < 4.14.276cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.15 < 4.19.238cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.20 < 5.4.189cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.5 < 5.10.111cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.11 < 5.15.34cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.16 < 5.16.20cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.17 < 5.17.3cpe:2.3:o:linux:linux_kernel:3.8:-:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:3.8:rc2:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:3.8:rc3:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:3.8:rc4:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:3.8:rc5:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:3.8:rc6:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:3.8:rc7:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:5.18:rc1:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 42288fe366c4f1ce7522bc9f27d0bc2a81c55264 < 8510c2346d9e47a72b7f018a36ef0c39483e53d6 ; affected 42288fe366c4f1ce7522bc9f27d0bc2a81c55264 < 5e16dc5378abd749a836daa9ee4ab2c8d2668999 ; affected 42288fe366c4f1ce7522bc9f27d0bc2a81c55264 < 39a32f3c06f6d68a530bf9612afa19f50f12e93d ; affected 42288fe366c4f1ce7522bc9f27d0bc2a81c55264 < 25f506273b6ae806fd46bfcb6fdaa5b9ec81a05b ; affected 42288fe366c4f1ce7522bc9f27d0bc2a81c55264 < f7e183b0a7136b6dc9c7b9b2a85a608a8feba894 ; affected 42288fe366c4f1ce7522bc9f27d0bc2a81c55264 < 198932a14aeb19a15cf19e51e151d023bc4cd648 |
| Linux · Linux | affected 3.8 ; unaffected 0 < 3.8 ; unaffected 4.9.311 ≤ 4.9.* ; unaffected 4.14.276 ≤ 4.14.* ; unaffected 4.19.238 ≤ 4.19.* ; unaffected 5.4.189 ≤ 5.4.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |