Advisories » MGASA-2021-0225

Updated kernel-linus packages fix security vulnerability

Publication date: 31 May 2021
Modification date: 17 Feb 2022
Type: security
Affected Mageia releases : 7 , 8
CVE: CVE-2021-33200

Description

This kernel-linus update is based on upstream 5.10.41 and fixes at least
the following security issue:

kernel/bpf/verifier.c in the Linux kernel through 5.12.7 enforces incorrect
limits for pointer arithmetic operations. This can be abused to perform
out-of-bounds reads and writes in kernel memory, leading to local privilege
escalation to root. In particular, there is a corner case where the off reg
causes a masking direction change, which then results in an incorrect final
aux->alu_limit (CVE-2021-33200).

For other upstream fixes, see the referenced changelogs.
                

References

• https://bugs.mageia.org/show_bug.cgi?id=28981
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.38
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.39
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.40
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.41
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33200

SRPMS

7/core

• kernel-linus-5.10.41-1.mga7

8/core

• kernel-linus-5.10.41-1.mga8