CVE-2023-53179: Linux Kernel

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: netfilter: ipset: add the missing IP_SET_HASH_WITH_NET0 macro for ip_set_hash_netportnet.c The missing IP_SET_HASH_WITH_NET0 macro in ip_set_hash_netportnet can lead to the use of wrong `CIDR_POS(c)` for calculating array offsets, which can lead to integer underflow. As a result, it leads to slab out-of-bound access. This patch adds back the IP_SET_HASH_WITH_NET0 macro to ip_set_hash_netportnet to address the issue.

Affected products

• Linux Linux Kernel: from 4.4.165, before 4.5 (fixed in 4.5); from 4.9.141, before 4.10 (fixed in 4.10); from 4.14.84, before 4.14.326 (fixed in 4.14.326); from 4.19.5, before 4.19.295 (fixed in 4.19.295); from 4.20.1, before 5.4.257 (fixed in 5.4.257); from 5.5, before 5.10.195 (fixed in 5.10.195); …

Published 2025-09-15. Last modified 2026-08-04.