#VU68314 Use-after-free in Linux kernel - CVE-2022-42720

Vulnerability identifier: #VU68314

Vulnerability risk: High

CVSSv4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

CVE-ID: CVE-2022-42720

CWE-ID: CWE-416

Exploitation vector: Adjecent network

Exploit availability: No public exploit available

Vulnerable software:
Linux kernel

Software vendor:
Linux Foundation

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in the mac80211 stack in Linux kernel when parsing a multi-BSS element. A remote attacker on the local network can send specially crafted WLAN frames to the affected system, trigger a use-after-free error and execute arbitrary code.

Install updates from vendor's website.

• https://bugzilla.suse.com/show_bug.cgi?id=1204059
• http://www.openwall.com/lists/oss-security/2022/10/13/5
• https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless.git/commit/?id=0b7808818cb9df6680f98996b8e9a439fa7bcc2f