{"id":"CVE-2026-23391","summary":"netfilter: xt_CT: drop pending enqueued packets on template removal","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: xt_CT: drop pending enqueued packets on template removal\n\nTemplates refer to objects that can go away while packets are sitting in\nnfqueue refer to:\n\n- helper, this can be an issue on module removal.\n- timeout policy, nfnetlink_cttimeout might remove it.\n\nThe use of templates with zone and event cache filter are safe, since\nthis just copies values.\n\nFlush these enqueued packets in case the template rule gets removed.","modified":"2026-04-19T04:18:03.588746Z","published":"2026-03-25T10:33:15.677Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23391.json"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/19a230dec6bb8928e3f96387f9085cf2c79bcef9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/55445134d42b84cb0a272e42c98d233ca65eca83"},{"type":"WEB","url":"https://git.kernel.org/stable/c/63b8097cea1923fe82cd598068d0796da8c015ec"},{"type":"WEB","url":"https://git.kernel.org/stable/c/777d02efe3d630cca4c1b63962cec17c57711325"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cb549925875fa06dd155e49db4ac2c5044c30f9c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cc57506dd66555899560b9c0f24e813f034e12ec"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d2d0bae0c9a2a17b6990a2966f5cdce0813d6256"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f62a218a946b19bb59abdd5361da85fa4606b96b"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23391.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23391"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"24de58f465165298aaa8f286b2592f0163706cfe"},{"fixed":"55445134d42b84cb0a272e42c98d233ca65eca83"},{"fixed":"cc57506dd66555899560b9c0f24e813f034e12ec"},{"fixed":"d2d0bae0c9a2a17b6990a2966f5cdce0813d6256"},{"fixed":"63b8097cea1923fe82cd598068d0796da8c015ec"},{"fixed":"19a230dec6bb8928e3f96387f9085cf2c79bcef9"},{"fixed":"cb549925875fa06dd155e49db4ac2c5044c30f9c"},{"fixed":"777d02efe3d630cca4c1b63962cec17c57711325"},{"fixed":"f62a218a946b19bb59abdd5361da85fa4606b96b"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-23391.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.4.0"},{"fixed":"5.10.253"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.203"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.167"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.130"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.78"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.20"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.10"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-23391.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}