A lack of CPU resource in the Linux kernel tracing module functionality in versions prior to 5.14-rc3 was found in the way user uses trace ring buffer in a specific way. Only privileged local users (with CAP_SYS_ADMIN capability) could use this flaw to starve the resources causing denial of service.
|https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=67f0d6d9883c13174669f88adac4f0ee656cc16a||Mailing List Patch Vendor Advisory|
|https://bugzilla.redhat.com/show_bug.cgi?id=1989165||Issue Tracking Patch Third Party Advisory|
|https://www.debian.org/security/2021/dsa-4978||Third Party Advisory|
|https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html||Third Party Advisory|
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