CVE-2023-3777

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A use-after-free vulnerability in the Linux kernel's netfilter: nf tables component can be exploited to achieve local privilege escalation. When nf tables delrule() is flushing table rules, it is not checked whether the chain is bound and the chain's owner rule can also release the objects in certain circumstances.

Recommendations Upgrade past commit 6eaf41e87a223ae6f8e7a28d6e78384ad7e407f8 to resolve the issue. As a temporary workaround, consider restricting access to the nf tables delrule() function until a patch is available.