CVE-2022-49549
x86/MCE/AMD: Fix memory leak when threshold_create_bank() fails
At a glance
- Source
- NVD
- EPSS
- EPSS 0.27 % · percentile 19 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Modified
Description
In the Linux kernel, the following vulnerability has been resolved: x86/MCE/AMD: Fix memory leak when threshold_create_bank() fails In mce_threshold_create_device(), if threshold_create_bank() fails, the previously allocated threshold banks array @bp will be leaked because the call to mce_threshold_remove_device() will not free it. This happens because mce_threshold_remove_device() fetches the pointer through the threshold_banks per-CPU variable but bp is written there only after the bank creation is successful, and not before, when threshold_create_bank() fails. Add a helper which unwinds all the bank creation work previously done and pass into it the previously allocated threshold banks array for freeing. [ bp: Massage. ]
Weaknesses (CWE)
- CWE-401 — Missing Release of Memory after Effective Lifetime
References
- https://git.kernel.org/stable/c/b4acb8e7f1594607bc9017ef0aacb40b24a003d6
- https://git.kernel.org/stable/c/cc0dd4456f9573bf8af9b4d8754433918e809e1e
- https://git.kernel.org/stable/c/9708f1956eeb70c86943e0bc62fa3b0101b59616
- https://git.kernel.org/stable/c/396b8e7ab2a99ddac57d3522b3da5e58cb608d37
- https://git.kernel.org/stable/c/e5f28623ceb103e13fc3d7bd45edf9818b227fd0
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 | CISA-ADP |
| 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) |
| 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 · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) |
European references
- ENISA EUVD · EUVD-2022-54683
- GCVE · GCVE-0-2022-49549
CERT-FR advisories
- CERTFR-2025-AVI-0336 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0307 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0252 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.8 < 5.10.121cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.11 < 5.15.46cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.16 < 5.17.14cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.18 < 5.18.3
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 6458de97fc15530b54477c4e2b70af653e8ac3d9 < b4acb8e7f1594607bc9017ef0aacb40b24a003d6 ; affected 6458de97fc15530b54477c4e2b70af653e8ac3d9 < cc0dd4456f9573bf8af9b4d8754433918e809e1e ; affected 6458de97fc15530b54477c4e2b70af653e8ac3d9 < 9708f1956eeb70c86943e0bc62fa3b0101b59616 ; affected 6458de97fc15530b54477c4e2b70af653e8ac3d9 < 396b8e7ab2a99ddac57d3522b3da5e58cb608d37 ; affected 6458de97fc15530b54477c4e2b70af653e8ac3d9 < e5f28623ceb103e13fc3d7bd45edf9818b227fd0 |
| Linux · Linux | affected 5.8 ; unaffected 0 < 5.8 ; unaffected 5.10.121 ≤ 5.10.* ; unaffected 5.15.46 ≤ 5.15.* ; unaffected 5.17.14 ≤ 5.17.* ; unaffected 5.18.3 ≤ 5.18.* |
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 |