SB20240531164 - Use-after-free in Linux kernel drm bridge driver
Published: May 31, 2024 Updated: May 14, 2025
Security Bulletin ID
SB20240531164
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2021-47063)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the panel_bridge_attach() function in drivers/gpu/drm/bridge/panel.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/ce450934a00cf896e648fde08d0bd1426653d7a2
- https://git.kernel.org/stable/c/18149b420c9bd93c443e8d1f48a063d71d9f6aa1
- https://git.kernel.org/stable/c/98d7d76a74e48ec3ddf2e23950adff7edcab9327
- https://git.kernel.org/stable/c/4d906839d321c2efbf3fed4bc31ffd9ff55b75c0
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.37
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.21
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13