Information Exposure Affecting perf package, versions <0:3.10.0-1160.31.1.el7


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.15% (36th percentile)

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  • Snyk IDSNYK-RHEL7-PERF-7975916
  • published14 Sept 2024
  • disclosed19 Mar 2021

Introduced: 19 Mar 2021

CVE-2020-27170  (opens in a new tab)
CWE-200  (opens in a new tab)

How to fix?

Upgrade RHEL:7 perf to version 0:3.10.0-1160.31.1.el7 or higher.
This issue was patched in RHSA-2021:2314.

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:7 relevant fixed versions and status.

An issue was discovered in the Linux kernel before 5.11.8. kernel/bpf/verifier.c performs undesirable out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory, aka CID-f232326f6966. This affects pointer types that do not define a ptr_limit.

CVSS Base Scores

version 3.1