CVE-2022-49549
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…
Does this matter?
Lower severity and a low EPSS score (0.26%). Track it; it rarely justifies an emergency change on its own.
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. ]
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.26% probability · 18th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-401
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.