Buffer overflow in Linux

CVE-2023-53179

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.

Vulnerability class: Buffer Overflow

EPSS: 0.002 (5.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

  • Linux — versions 886503f34d63e681662057448819edb5b1057a97, 5.15.132, 4.14.326
  • Linux Linux_kernel — versions 4.20

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2023-53179?
CVE-2023-53179 is a high-severity vulnerability in Linux, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2025-09-15.
How severe is CVE-2023-53179?
High severity. CVSS v3 base score is 7.8 out of 10.