MGASA-2021-0224

Advisory lineage Upstream: 2 Downstream: 0
Published: 31 May 2021, 20:31
Last modified:16 Apr 2026, 04:25

Vulnerability Summary

Overall Risk (default)
minimal
0/100
CVSS Score
No data
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

31 May 2021, 20:31
Published
Vulnerability first disclosed
16 Apr 2026, 04:25
Last Modified
Vulnerability information updated

Description

Updated kernel packages fix security vulnerabilities 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.

Affected Systems

  • mageia•kernel

    < 5.10.41-1.mga7

  • mageia•kmod-virtualbox

    < 6.1.22-1.5.mga7

  • mageia•kmod-xtables-addons

    < 3.13-27.mga7

  • mageia•kernel

    < 5.10.41-1.mga8

  • mageia•kmod-virtualbox

    < 6.1.22-1.5.mga8

  • mageia•kmod-xtables-addons

    < 3.18-1.5.mga8

References (6)