A flaw in the Linux kernel on powerpc-systems can allow a local user to cause a denial of service and panic the system when issuing the 'perf record' command.
Any of the following conditions must be met to be capable to abuse this flaw:
- The root user is issuing the command
- The process issuing the 'perf record' has CAP_PERFMON, CAP_SYS_PTRACE or CAP_SYS_ADMIN
- The kernel sysctl kernel.perf_event_paranoid = -1 is set.
Reference and upstream patch:
Created kernel tracking bugs for this issue:
Affects: fedora-all [bug 1992277]
This was fixed for Fedora with the 5.12.13 stable kernel updates.
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):