{"id":"CVE-2023-42756","title":"Kernel: netfilter: race condition between ipset_cmd_add and ipset_cmd_swap","summary":"A flaw was found in the Netfilter subsystem of the Linux kernel. A race condition between IPSET_CMD_ADD and IPSET_CMD_SWAP can lead to a kernel panic due to the invocation of `__ip_set_put` on a wrong `set`. This issue may allow a local …","severity":"medium","cvss":4.4,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-362"],"vendor":"Red Hat","product":"kernel","affected":["kernel (all versions)","kernel (all versions)","kernel","kernel","kernel-rt","kernel","kernel-rt","kernel-rt (all versions)"],"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2025-02-27T20:32:17.539570Z"},"exploitAvailable":true,"published":"2023-09-28","updated":"2026-11-01","sourceUpdated":"2026-11-01T10:40:04.501Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-42756","references":[{"url":"https://access.redhat.com/errata/RHSA-2024:2394","label":"RHSA-2024:2394"},{"url":"https://access.redhat.com/security/cve/CVE-2023-42756"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2239848","label":"RHBZ#2239848"},{"url":"https://seclists.org/oss-sec/2023/q3/242"}],"tags":["cve.org","exploit-available"],"epss":0.00274,"epssPercentile":0.19862,"ingestedAt":"2026-11-05T18:28:50.714Z","slug":"CVE-2023-42756","body":"## Overview\n\nA flaw was found in the Netfilter subsystem of the Linux kernel. A race condition between IPSET_CMD_ADD and IPSET_CMD_SWAP can lead to a kernel panic due to the invocation of `__ip_set_put` on a wrong `set`. This issue may allow a local user to crash the system.\n\n## Affected\n\n- `kernel (all versions)`\n- `kernel (all versions)`\n- `kernel`\n- `kernel`\n- `kernel-rt`\n- `kernel`\n- `kernel-rt`\n- `kernel-rt (all versions)`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n### Workarounds\n\nMitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.","depth":"twilight","depthScore":36,"depthScoreParts":{"impact":24.2,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[]}