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. ]
Metrics
CVSS 3.1 5.5/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 6458de97fc15530b54477c4e2b70af653e8ac3d9, < b4acb8e7f1594607bc9017ef0aacb40b24a003d6; >= 6458de97fc15530b54477c4e2b70af653e8ac3d9, < cc0dd4456f9573bf8af9b4d8754433918e809e1e; >= 6458de97fc15530b54477c4e2b70af653e8ac3d9, < 9708f1956eeb70c86943e0bc62fa3b0101b59616; >= 6458de97fc15530b54477c4e2b70af653e8ac3d9, < 396b8e7ab2a99ddac57d3522b3da5e58cb608d37; >= 6458de97fc15530b54477c4e2b70af653e8ac3d9, < e5f28623ceb103e13fc3d7bd45edf9818b227fd0 |
| Linux | Linux | 5.8 |
References
- https://git.kernel.org/stable/c/396b8e7ab2a99ddac57d3522b3da5e58cb608d37Patch
- https://git.kernel.org/stable/c/9708f1956eeb70c86943e0bc62fa3b0101b59616Patch
- https://git.kernel.org/stable/c/b4acb8e7f1594607bc9017ef0aacb40b24a003d6Patch
- https://git.kernel.org/stable/c/cc0dd4456f9573bf8af9b4d8754433918e809e1ePatch
- https://git.kernel.org/stable/c/e5f28623ceb103e13fc3d7bd45edf9818b227fd0Patch
Timeline
- Published
- Feb 26, 2025
- Last modified
- Jun 17, 2026
- NVD status
- Modified