CVE & CISA-KEV Catalog

CVE-2021-38200

MEDIUM
5.5
CVSS v3
NVD

Description

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.

CWE-476NULL Pointer Dereference

How to fix

Remediation Available
linux-aws-5.11Ubuntu
Fixed in:5.11.0-1017.18~20.04.1USN-5070-1
linux-azure-5.11Ubuntu
Fixed in:5.11.0-1015.16~20.04.1USN-5070-1
linux-hwe-5.11Ubuntu
Fixed in:5.11.0-34.36~20.04.1USN-5070-1
linux-image-5.11.0-1015-azureUbuntu
Fixed in:5.11.0-1015.16~20.04.1USN-5070-1
linux-image-5.11.0-1017-awsUbuntu
Fixed in:5.11.0-1017.18~20.04.1USN-5070-1
linux-image-5.11.0-1017-oracleUbuntu
Fixed in:5.11.0-1017.18~20.04.1USN-5070-1
linux-image-5.11.0-34-genericUbuntu
Fixed in:5.11.0-34.36~20.04.1USN-5070-1
linux-image-5.11.0-34-generic-64kUbuntu
Fixed in:5.11.0-34.36~20.04.1USN-5070-1
linux-image-5.11.0-34-generic-lpaeUbuntu
Fixed in:5.11.0-34.36~20.04.1USN-5070-1
linux-image-5.11.0-34-lowlatencyUbuntu
Fixed in:5.11.0-34.36~20.04.1USN-5070-1
linux-image-awsUbuntu
Fixed in:5.11.0.1017.18~20.04.16USN-5070-1
linux-image-generic-64k-hwe-20.04Ubuntu
Fixed in:5.11.0.34.36~20.04.13USN-5070-1
linux-image-generic-hwe-20.04Ubuntu
Fixed in:5.11.0.34.36~20.04.13USN-5070-1
linux-image-generic-lpae-hwe-20.04Ubuntu
Fixed in:5.11.0.34.36~20.04.13USN-5070-1
linux-image-lowlatency-hwe-20.04Ubuntu
Fixed in:5.11.0.34.36~20.04.13USN-5070-1
linux-image-oracleUbuntu
Fixed in:5.11.0.1017.18~20.04.10USN-5070-1
linux-image-virtual-hwe-20.04Ubuntu
Fixed in:5.11.0.34.36~20.04.13USN-5070-1
linux-oracle-5.11Ubuntu
Fixed in:5.11.0-1017.18~20.04.1USN-5070-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityNone
IntegrityNone
AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

0.26%probability of exploitation in 30 days
17thpercentile

Low risk: more likely to be exploited than 17% of all known CVEs.

References

Related Vulnerabilities

Other CWE-476 (NULL Pointer Dereference) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2023-21758High7.592%-Fix
CVE-2023-21547High7.588%-Fix
CVE-2014-3470Medium4.386%-Fix
CVE-2021-44224High8.282%-Fix
CVE-2016-0742High7.582%-Fix
CVE-2009-1386Medium5.080%-Fix
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CVE-2021-38200 severity badge

Markdown

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HTML

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.