CVE-2023-4569: Debian Linux

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

A memory leak flaw was found in nft_set_catchall_flush in net/netfilter/nf_tables_api.c in the Linux Kernel. This issue may allow a local attacker to cause double-deactivations of catchall elements, which can result in a memory leak.

Affected products

• Debian Debian Linux: version 12.0 only
• Linux Linux Kernel: before 6.5 (fixed in 6.5); version 6.5 only
• Red Hat Enterprise Linux: version 8.0 only; version 9.0 only

Published 2023-08-28. Last modified 2026-06-17.