CVE-2022-49549
x86/MCE/AMD: Fix memory leak when threshold_create_bank() fails
- Published
- Updated
- Reserved
- Assigned by
- Linux
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. ]
Timeline
ID reserved
By Linux
Published
- 15 months later
· 15 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.27% · top 81% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
- affected 6458de97fc15530b54477c4e2b70af653e8ac3d9 – < b4acb8e7f1594607bc9017ef0aacb40b24a003d6
- affected 6458de97fc15530b54477c4e2b70af653e8ac3d9 – < cc0dd4456f9573bf8af9b4d8754433918e809e1e
- affected 6458de97fc15530b54477c4e2b70af653e8ac3d9 – < 9708f1956eeb70c86943e0bc62fa3b0101b59616
- affected 6458de97fc15530b54477c4e2b70af653e8ac3d9 – < 396b8e7ab2a99ddac57d3522b3da5e58cb608d37
- affected 6458de97fc15530b54477c4e2b70af653e8ac3d9 – < e5f28623ceb103e13fc3d7bd45edf9818b227fd0
- affected 5.8
- unaffected < 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.*
- unaffected 5.19 – ≤ *
References (5)
- https://git.kernel.org/stable/c/b4acb8e7f1594607bc9017ef0aacb40b24a003d6 (opens in a new tab)
- https://git.kernel.org/stable/c/cc0dd4456f9573bf8af9b4d8754433918e809e1e (opens in a new tab)
- https://git.kernel.org/stable/c/9708f1956eeb70c86943e0bc62fa3b0101b59616 (opens in a new tab)
- https://git.kernel.org/stable/c/396b8e7ab2a99ddac57d3522b3da5e58cb608d37 (opens in a new tab)
- https://git.kernel.org/stable/c/e5f28623ceb103e13fc3d7bd45edf9818b227fd0 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-49549)Record last updated .