Off-by-one Error Affecting kernel-livepatch-5_3_18-24_61-default package, versions <1-5.3.4


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.58% (43rd percentile)

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  • Snyk IDSNYK-SLES152-KERNELLIVEPATCH53182461DEFAULT-2684997
  • published14 Apr 2022
  • disclosed16 Apr 2021

Introduced: 16 Apr 2021

CVE-2020-27171  (opens in a new tab)
CWE-193  (opens in a new tab)

How to fix?

Upgrade SLES:15.2 kernel-livepatch-5_3_18-24_61-default to version 1-5.3.4 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-livepatch-5_3_18-24_61-default package and not the kernel-livepatch-5_3_18-24_61-default package as distributed by SLES. See How to fix? for SLES:15.2 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 Base Scores

version 3.1