<p>Upgrade <code>RHEL:8</code> <code>perf</code> to version 0:4.18.0-348.el8 or higher.<br>This issue was patched in <code>RHSA-2021:4356</code>.</p>

NULL Pointer Dereference Affecting perf package, versions <0:4.18.0-348.el8

Threat Intelligence

0.05% (16^th percentile)

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Snyk ID SNYK-RHEL8-PERF-4154185
published 26 Jul 2021
disclosed 22 Mar 2021

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Introduced: 22 Mar 2021

CVE-2021-28971 Open this link in a new tab CWE-476 Open this link in a new tab

How to fix?

Upgrade RHEL:8 perf to version 0:4.18.0-348.el8 or higher.
This issue was patched in RHSA-2021:4356.

NVD Description

Note: Versions mentioned in the description apply only to the upstream perf package and not the perf package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

In intel_pmu_drain_pebs_nhm in arch/x86/events/intel/ds.c in the Linux kernel through 5.11.8 on some Haswell CPUs, userspace applications (such as perf-fuzzer) can cause a system crash because the PEBS status in a PEBS record is mishandled, aka CID-d88d05a9e0b6.

References

CVSS Scores

version 3.1

Attack Vector (AV)

Local
Attack Complexity (AC)

Low
Privileges Required (PR)

Low
User Interaction (UI)

None

Scope (S)

Unchanged

Confidentiality (C)

None
Integrity (I)

None
Availability (A)

High

NULL Pointer Dereference Affecting perf package, versions <0:4.18.0-348.el8

Severity

Based on Red Hat Enterprise Linux security rating