Vulnerabilities > CVE-2022-49549 - Memory Leak vulnerability in Linux Kernel
Attack vector
LOCAL Attack complexity
LOW Privileges required
LOW Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH Summary
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. ]
Vulnerable Configurations
Common Weakness Enumeration (CWE)
References
- https://git.kernel.org/stable/c/396b8e7ab2a99ddac57d3522b3da5e58cb608d37
- https://git.kernel.org/stable/c/9708f1956eeb70c86943e0bc62fa3b0101b59616
- https://git.kernel.org/stable/c/b4acb8e7f1594607bc9017ef0aacb40b24a003d6
- https://git.kernel.org/stable/c/cc0dd4456f9573bf8af9b4d8754433918e809e1e
- https://git.kernel.org/stable/c/e5f28623ceb103e13fc3d7bd45edf9818b227fd0