Use-after-free in Ubuntu and linux-image-generic-6.8 (Ubuntu package) - #VU115967

Vulnerability identifier: #VU115967

CSH Severity: Low

CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: N/A

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the AF_UNIX socket garbage collection implementation on Ubuntu Noble's 6.8 kernel. A local user can trigger a use-after-free error and crash the OS kernel or execute arbitrary code with elevated privileges. 

Ubuntu
linux-image-generic-6.8 (Ubuntu package)
linux (Ubuntu package)
linux-oracle-6.8 (Ubuntu package)
linux-ibm (Ubuntu package)
linux-realtime (Ubuntu package)

Install updates from vendor's website.

linux-image-generic-6.8 (Ubuntu package) - update to 6.8.0-83.83~22.04.1
linux (Ubuntu package) - addressed in versions 6.8.0-83.83, 6.8.0-83.83.1, 6.8.0-83.83.1~22.04.1, 6.8.0-83.83~22.04.1, 6.8.0-1022.24, 6.8.0-1035.36, 6.8.0-1035.39, 6.8.0-1038.40, 6.8.0-1039.41
linux-oracle-6.8 (Ubuntu package) - update to 6.8.0-1035.36~22.04.1
linux-ibm (Ubuntu package) - addressed in versions 6.8.0-1036.36, 6.8.0-1036.36~22.04.1, 6.8.0-1038.41, 6.8.0-1038.41.1, 6.8.0-1038.41~22.04.1, 6.8.0-1038.42
linux-realtime (Ubuntu package) - update to 6.8.1-1033.34

• https://ubuntu.com/security/notices/USN-7758-1

• Ubuntu update for linux-realtime
• Ubuntu update for linux-ibm
• Ubuntu update for linux
• Ubuntu update for linux-oracle-6.8