{"id":"CVE-2026-23391","title":"netfilter: xt_CT: drop pending enqueued packets on template removal","summary":"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- helpe…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 24de58f465165298aaa8f286b2592f0163706cfe < 55445134d42b84cb0a272e42c98d233ca65eca83","Linux >= 24de58f465165298aaa8f286b2592f0163706cfe < cc57506dd66555899560b9c0f24e813f034e12ec","Linux >= 24de58f465165298aaa8f286b2592f0163706cfe < d2d0bae0c9a2a17b6990a2966f5cdce0813d6256","Linux >= 24de58f465165298aaa8f286b2592f0163706cfe < 63b8097cea1923fe82cd598068d0796da8c015ec","Linux >= 24de58f465165298aaa8f286b2592f0163706cfe < 19a230dec6bb8928e3f96387f9085cf2c79bcef9","Linux >= 24de58f465165298aaa8f286b2592f0163706cfe < cb549925875fa06dd155e49db4ac2c5044c30f9c","Linux >= 24de58f465165298aaa8f286b2592f0163706cfe < 777d02efe3d630cca4c1b63962cec17c57711325","Linux >= 24de58f465165298aaa8f286b2592f0163706cfe < f62a218a946b19bb59abdd5361da85fa4606b96b","Linux 3.4"],"published":"2026-03-25","updated":"2026-09-08","sourceUpdated":"2026-09-08T08:45:54.799Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-23391","references":[{"url":"https://git.kernel.org/stable/c/55445134d42b84cb0a272e42c98d233ca65eca83"},{"url":"https://git.kernel.org/stable/c/cc57506dd66555899560b9c0f24e813f034e12ec"},{"url":"https://git.kernel.org/stable/c/d2d0bae0c9a2a17b6990a2966f5cdce0813d6256"},{"url":"https://git.kernel.org/stable/c/63b8097cea1923fe82cd598068d0796da8c015ec"},{"url":"https://git.kernel.org/stable/c/19a230dec6bb8928e3f96387f9085cf2c79bcef9"},{"url":"https://git.kernel.org/stable/c/cb549925875fa06dd155e49db4ac2c5044c30f9c"},{"url":"https://git.kernel.org/stable/c/777d02efe3d630cca4c1b63962cec17c57711325"},{"url":"https://git.kernel.org/stable/c/f62a218a946b19bb59abdd5361da85fa4606b96b"}],"tags":["cve.org"],"epss":0.00128,"epssPercentile":0.02844,"ingestedAt":"2026-09-08T15:33:26.992Z","slug":"CVE-2026-23391","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= 24de58f465165298aaa8f286b2592f0163706cfe < 55445134d42b84cb0a272e42c98d233ca65eca83`\n- `Linux >= 24de58f465165298aaa8f286b2592f0163706cfe < cc57506dd66555899560b9c0f24e813f034e12ec`\n- `Linux >= 24de58f465165298aaa8f286b2592f0163706cfe < d2d0bae0c9a2a17b6990a2966f5cdce0813d6256`\n- `Linux >= 24de58f465165298aaa8f286b2592f0163706cfe < 63b8097cea1923fe82cd598068d0796da8c015ec`\n- `Linux >= 24de58f465165298aaa8f286b2592f0163706cfe < 19a230dec6bb8928e3f96387f9085cf2c79bcef9`\n- `Linux >= 24de58f465165298aaa8f286b2592f0163706cfe < cb549925875fa06dd155e49db4ac2c5044c30f9c`\n- `Linux >= 24de58f465165298aaa8f286b2592f0163706cfe < 777d02efe3d630cca4c1b63962cec17c57711325`\n- `Linux >= 24de58f465165298aaa8f286b2592f0163706cfe < f62a218a946b19bb59abdd5361da85fa4606b96b`\n- `Linux 3.4`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}