{"id":"CVE-2026-72253","title":"netfilter: nf_conntrack_sip: validate skb_dst() before accessing it","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conntrack_sip: validate skb_dst() before accessing it\n\ntc ingress and openvswitch do not guarantee routing information to be\navailable. These subsystems u…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= cae3a2627520c3795b54533c5328b77af3405dbe < 7866116a040b3a23fb094e7d8f7ea3d61b3ac70b","Linux >= cae3a2627520c3795b54533c5328b77af3405dbe < c5ef7228be04518d95591fc5369a9c554b19756d","Linux >= cae3a2627520c3795b54533c5328b77af3405dbe < 0aec339694a56e263d4b22475ff7211d40900830","Linux >= cae3a2627520c3795b54533c5328b77af3405dbe < e64a48c50a1ff565a98c6a98d82b5b942868e76e","Linux >= cae3a2627520c3795b54533c5328b77af3405dbe < c199ed687c00841daf60e9d131976958583a8c09","Linux >= cae3a2627520c3795b54533c5328b77af3405dbe < 09755dc62b026076b1d47f83489eb0547c8135e0","Linux >= cae3a2627520c3795b54533c5328b77af3405dbe < b843a96252f672332837ea2ecb7c8db0acf68e20","Linux >= cae3a2627520c3795b54533c5328b77af3405dbe < e5e24a365a5e024efef63cc49abb345fbd4852c5","Linux 4.3"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-16T18:45:17.838636Z"},"published":"2026-08-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T18:55:13.536Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-72253","references":[{"url":"https://git.kernel.org/stable/c/7866116a040b3a23fb094e7d8f7ea3d61b3ac70b"},{"url":"https://git.kernel.org/stable/c/c5ef7228be04518d95591fc5369a9c554b19756d"},{"url":"https://git.kernel.org/stable/c/0aec339694a56e263d4b22475ff7211d40900830"},{"url":"https://git.kernel.org/stable/c/e64a48c50a1ff565a98c6a98d82b5b942868e76e"},{"url":"https://git.kernel.org/stable/c/c199ed687c00841daf60e9d131976958583a8c09"},{"url":"https://git.kernel.org/stable/c/09755dc62b026076b1d47f83489eb0547c8135e0"},{"url":"https://git.kernel.org/stable/c/b843a96252f672332837ea2ecb7c8db0acf68e20"},{"url":"https://git.kernel.org/stable/c/e5e24a365a5e024efef63cc49abb345fbd4852c5"}],"tags":["cve.org"],"epss":0.00696,"epssPercentile":0.5205,"ingestedAt":"2026-10-16T19:46:24.416Z","slug":"CVE-2026-72253","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conntrack_sip: validate skb_dst() before accessing it\n\ntc ingress and openvswitch do not guarantee routing information to be\navailable. These subsystems use the conntrack helper infrastructure, and\nthe SIP helper relies on the skb_dst() to be present if\nsip_external_media is set to 1 (which is disabled by default as a module\nparameter).\n\nThis effectively disables the sip_external_media toggle for these\nsubsystems without resulting in a crash.\n\n## Affected\n\n- `Linux >= cae3a2627520c3795b54533c5328b77af3405dbe < 7866116a040b3a23fb094e7d8f7ea3d61b3ac70b`\n- `Linux >= cae3a2627520c3795b54533c5328b77af3405dbe < c5ef7228be04518d95591fc5369a9c554b19756d`\n- `Linux >= cae3a2627520c3795b54533c5328b77af3405dbe < 0aec339694a56e263d4b22475ff7211d40900830`\n- `Linux >= cae3a2627520c3795b54533c5328b77af3405dbe < e64a48c50a1ff565a98c6a98d82b5b942868e76e`\n- `Linux >= cae3a2627520c3795b54533c5328b77af3405dbe < c199ed687c00841daf60e9d131976958583a8c09`\n- `Linux >= cae3a2627520c3795b54533c5328b77af3405dbe < 09755dc62b026076b1d47f83489eb0547c8135e0`\n- `Linux >= cae3a2627520c3795b54533c5328b77af3405dbe < b843a96252f672332837ea2ecb7c8db0acf68e20`\n- `Linux >= cae3a2627520c3795b54533c5328b77af3405dbe < e5e24a365a5e024efef63cc49abb345fbd4852c5`\n- `Linux 4.3`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}