Updated kernel packages fix security vulnerabilities
Publication date: 31 May 2021Modification date: 17 Feb 2022
Type: security
Affected Mageia releases : 7 , 8
CVE: CVE-2021-3564 , CVE-2021-33200
Description
This kernel update is based on upstream 5.10.41 and fixes at least the
following security issues:
A double-free memory corruption in the Linux kernel HCI device
initialization subsystem was found in the way user attach malicious HCI
TTY Bluetooth device. A local user could use this flaw to crash the system
(CVE-2021-3564).
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).
Other fixes in this update:
- proc: Check /proc/$pid/attr/ writes against file opener
For other upstream fixes, see the referenced changelogs.
References
- https://bugs.mageia.org/show_bug.cgi?id=28980
- 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-2021-3564
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33200
SRPMS
8/core
- kernel-5.10.41-1.mga8
- kmod-virtualbox-6.1.22-1.5.mga8
- kmod-xtables-addons-3.18-1.5.mga8
7/core
- kernel-5.10.41-1.mga7
- kmod-virtualbox-6.1.22-1.5.mga7
- kmod-xtables-addons-3.13-27.mga7