Integer Underflow Affecting kernel-zfcpdump-modules-internal package, versions *


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.05% (18th percentile)

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  • Snyk IDSNYK-RHEL8-KERNELZFCPDUMPMODULESINTERNAL-1345771
  • published26 Jul 2021
  • disclosed19 Mar 2021

Introduced: 19 Mar 2021

CVE-2020-27171  (opens in a new tab)
CWE-191  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:8 kernel-zfcpdump-modules-internal.

NVD Description

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

An issue was discovered in the Linux kernel before 5.11.8. kernel/bpf/verifier.c has an off-by-one error (with a resultant integer underflow) affecting 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-10d2bb2e6b1d.

CVSS Scores

version 3.1