A flaw was found in the Linux kernel. A use-after-free memory flaw was found in the perf subsystem allowing a local attacker with permission to monitor perf events to corrupt memory and possibly escalate privileges. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
| Link | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1862849 | patch third party advisory issue tracking |
| https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html | third party advisory mailing list |
| https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html | third party advisory mailing list |