Out-of-bounds Read Affecting kernel-devel package, versions <4.12.14-197.89.2


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.05% (22nd percentile)

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  • Snyk IDSNYK-SLES151-KERNELDEVEL-2688732
  • published14 Apr 2022
  • disclosed18 May 2021

Introduced: 18 May 2021

CVE-2021-29155  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade SLES:15.1 kernel-devel to version 4.12.14-197.89.2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-devel package and not the kernel-devel package as distributed by SLES. See How to fix? for SLES:15.1 relevant fixed versions and status.

An issue was discovered in the Linux kernel through 5.11.x. 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. Specifically, for sequences of pointer arithmetic operations, the pointer modification performed by the first operation is not correctly accounted for when restricting subsequent operations.

References

CVSS Scores

version 3.1