CVE-2023-4004: Debian Linux

High severity, CVSS 7.8. EPSS: 0.9% chance of exploitation in the next 30 days.

A use-after-free flaw was found in the Linux kernel's netfilter in the way a user triggers the nft_pipapo_remove function with the element, without a NFT_SET_EXT_KEY_END. This issue could allow a local user to crash the system or potentially escalate their privileges on the system.

Affected products

• Debian Debian Linux: version 10.0 only; version 11.0 only; version 12.0 only
• Fedoraproject Fedora: version 38 only
• Linux Linux Kernel: from 5.6, before 5.10.188 (fixed in 5.10.188); from 5.11, before 5.15.123 (fixed in 5.15.123); from 5.16, before 6.1.42 (fixed in 6.1.42); from 6.2, before 6.4.7 (fixed in 6.4.7)
• Netapp h300s: affected versions not specified
• Netapp h410s: affected versions not specified
• Netapp h500s: affected versions not specified
• Netapp h700s: affected versions not specified
• Red Hat Enterprise Linux: version 8.0 only; version 9.0 only

Published 2023-07-31. Last modified 2026-06-17.