VYPR
← All advisories
Unrated severityNVD Advisory· Published Mar 2, 2024· Updated May 4, 2025

netfilter: nf_tables: fix memleak when more than 255 elements expired

CVE-2023-52581

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

228

Patches

Vulnerability mechanics

References

7

News mentions

0

No linked articles in our index yet.