CVE-2023-52581: Linux Kernel

Medium severity, CVSS 6.3. EPSS: 0.3% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: fix memleak when more than 255 elements expired When more than 255 elements expired we're supposed to switch to a new gc container structure. This never happens: u8 type will wrap before reaching the boundary and nft_trans_gc_space() always returns true. This means we recycle the initial gc container structure and lose track of the elements that came before. While at it, don't deref 'gc' after we've passed it to call_rcu.

Affected products

• Linux Linux Kernel: from 6.5, before 6.5.6 (fixed in 6.5.6); version 6.6 only

Published 2024-03-02. Last modified 2026-06-17.