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Alma Linux: CVE-2021-29155: Moderate: kernel security, bug fix, and enhancement update (ALSA-2021-4356)

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Alma Linux: CVE-2021-29155: Moderate: kernel security, bug fix, and enhancement update (ALSA-2021-4356)

Severity
2
CVSS
(AV:L/AC:L/Au:N/C:P/I:N/A:N)
Published
04/20/2021
Created
05/05/2022
Added
05/04/2022
Modified
09/15/2022

Description

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.

Solution(s)

  • alma-upgrade-kernel-tools-libs-devel

References

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