Use-after-free in Linux kernel - CVE-2023-6111

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Main Vulnerability Database Vulnerabilities #VU83362

Use-after-free in Linux kernel - CVE-2023-6111

Published: November 21, 2023


Vulnerability identifier: #VU83362
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: CVE-2023-6111
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

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

The vulnerability exists due to a use-after-free error within the netfilter nf_tables component in Linux kernel. A local authenticated user can trigger a use-after-free error and escalate privileges on the system.


Affected software

Linux kernel
Amazon Linux AMI
Ubuntu
Fedora
linux-image-6.1.0-1028-oem (Ubuntu package)
linux-image-oem-22.04 (Ubuntu package)
linux-image-oem-22.04a (Ubuntu package)
linux-image-oem-22.04b (Ubuntu package)
linux-image-oem-22.04c (Ubuntu package)
kernel-livepatch
kernel
kernel-headers
kernel-tools

How to mitigate CVE-2023-6111

Install update from vendor's website.

linux-image-6.1.0-1028-oem (Ubuntu package) - update to 6.1.0-1028.28
linux-image-oem-22.04 (Ubuntu package) - update to 6.1.0.1028.29
linux-image-oem-22.04a (Ubuntu package) - update to 6.1.0.1028.29
linux-image-oem-22.04b (Ubuntu package) - update to 6.1.0.1028.29
linux-image-oem-22.04c (Ubuntu package) - update to 6.1.0.1028.29
kernel-livepatch - addressed in versions 6.1.56-82.125-1.0-1, 6.1.59-84.139-1.0-1, 6.1.61-85.141-1.0-1
kernel - addressed in versions 6.6.3-100.fc38, 6.6.3-200.fc39
kernel-headers - addressed in versions 6.6.3-100.fc38, 6.6.3-200.fc39
kernel-tools - addressed in versions 6.6.3-100.fc38, 6.6.3-200.fc39

External References

Related Security Bulletins