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SUSE: CVE-2021-3444: SUSE Linux Security Advisory

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SUSE: CVE-2021-3444: SUSE Linux Security Advisory

Severity
5
CVSS
(AV:L/AC:L/Au:N/C:P/I:P/A:P)
Published
03/23/2021
Created
04/13/2021
Added
04/10/2021
Modified
07/31/2021

Description

The bpf verifier in the Linux kernel did not properly handle mod32 destination register truncation when the source register was known to be 0. A local attacker with the ability to load bpf programs could use this gain out-of-bounds reads in kernel memory leading to information disclosure (kernel memory), and possibly out-of-bounds writes that could potentially lead to code execution. This issue was addressed in the upstream kernel in commit 9b00f1b78809 ("bpf: Fix truncation handling for mod32 dst reg wrt zero") and in Linux stable kernels 5.11.2, 5.10.19, and 5.4.101.

Solution(s)

  • suse-upgrade-kernel-default
  • suse-upgrade-kernel-docs
  • suse-upgrade-kernel-obs-build

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