SB2022092660 - Privilege escalation in Linux kernel dvb-core
Published: September 26, 2022 Updated: October 2, 2022
Security Bulletin ID
SB2022092660
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-2022-41218)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the dvb_demux_open() and dvb_dmxdev_release() function in drivers/media/dvb-core/dmxdev.c in Linux kernel. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/drivers/media/dvb-core/dmxdev.c
- https://lore.kernel.org/all/20220908132754.30532-1-tiwai@suse.de/
- http://www.openwall.com/lists/oss-security/2022/09/23/4
- http://www.openwall.com/lists/oss-security/2022/09/24/1
- http://www.openwall.com/lists/oss-security/2022/09/24/2