vulnerability
Ubuntu: (CVE-2022-49549): linux vulnerability
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:L/AC:L/Au:S/C:N/I:N/A:C) | Feb 26, 2025 | Mar 19, 2025 | Sep 1, 2025 |
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. ]
Solutions
References
- CVE-2022-49549
- https://attackerkb.com/topics/CVE-2022-49549
- CWE-401
- URL-https://git.kernel.org/linus/e5f28623ceb103e13fc3d7bd45edf9818b227fd0
- URL-https://git.kernel.org/stable/c/396b8e7ab2a99ddac57d3522b3da5e58cb608d37
- URL-https://git.kernel.org/stable/c/9708f1956eeb70c86943e0bc62fa3b0101b59616
- URL-https://git.kernel.org/stable/c/b4acb8e7f1594607bc9017ef0aacb40b24a003d6
- URL-https://git.kernel.org/stable/c/cc0dd4456f9573bf8af9b4d8754433918e809e1e
- URL-https://git.kernel.org/stable/c/e5f28623ceb103e13fc3d7bd45edf9818b227fd0
- URL-https://www.cve.org/CVERecord?id=CVE-2022-49549
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