CVE-2021-38200

low-risk
Published 2021-08-08

arch/powerpc/perf/core-book3s.c in the Linux kernel before 5.12.13, on systems with perf_event_paranoid=-1 and no specific PMU driver support registered, allows local users to cause a denial of service (perf_instruction_pointer NULL pointer dereference and OOPS) via a "perf record" command.

Do I need to act?

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0.04% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10 Medium
LOCAL / LOW complexity

Affected Products (1)

Affected Vendors

Linux

References (4)

Mailing List https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.13
Patch https://github.com/torvalds/linux/commit/60b7ed54a41b550d50caf7f2418db4a7e75b5bd...
Mailing List https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.13
Patch https://github.com/torvalds/linux/commit/60b7ed54a41b550d50caf7f2418db4a7e75b5bd...
23
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal