{"id":"CVE-2026-72450","title":"xfrm: validate selector family and prefixlen during match","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: validate selector family and prefixlen during match\n\nsyzbot reported a shift-out-of-bounds in xfrm_selector_match()\ndue to AF_UNSPEC selector with large prefixlen…","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 >= 8df5cd51fd70c33aa1776e5cbcd82b0a86649d73 < 87a5bbccc7ff4edb3f42fea387124237d2ba91ee","Linux >= 2d08a6c31c65f23db71a5385ee9cf9d8f9a67a71 < bd7f202cf77556cff59f68dc30e4cdf40cb6e33b","Linux >= bce1afaa212ec380bf971614f70909a27882b862 < a3968ad4195d72c8fddcc6c0ef39da95ac98711a","Linux >= 7d9868180bd1e4cf37e7c5067362658971162366 < efa9e3b9f3dea2e1ea4c7edf4edc863faef85986","Linux >= 3f0ab59e6537c6a8f9e1b355b48f9c05a76e8563 < 78783fefdc8f36879b1a17efa0d3195ea5f2dc5f","Linux >= 3f0ab59e6537c6a8f9e1b355b48f9c05a76e8563 < 6d99379c58f7f1c6ab2cc7aba01a4f52d71adcfe","Linux >= 3f0ab59e6537c6a8f9e1b355b48f9c05a76e8563 < 5a03a2ee17e8259dde631ed84fd8322db06cb2ae","Linux >= 3f0ab59e6537c6a8f9e1b355b48f9c05a76e8563 < 40f0b1047918539f0b0f795ac65e35336b4c2c78","Linux f31398570acf0f0804c644006f7bfa9067106b0a","Linux 401ad99a5ae7180dd9449eac104cb755f442e7f3","Linux e68dd80ba498265d2266b12dc3459164f4ff0c4a","Linux >= 5.10.229 < 5.10.261","Linux >= 5.15.170 < 5.15.212","Linux >= 6.1.115 < 6.1.178","Linux >= 6.6.59 < 6.6.145","Linux >= 4.19.323 < 4.20","Linux >= 5.4.285 < 5.5","Linux >= 6.11.6 < 6.12","Linux 6.12"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T18:50:15.343640Z"},"published":"2026-08-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T18:55:24.828Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-72450","references":[{"url":"https://git.kernel.org/stable/c/87a5bbccc7ff4edb3f42fea387124237d2ba91ee"},{"url":"https://git.kernel.org/stable/c/bd7f202cf77556cff59f68dc30e4cdf40cb6e33b"},{"url":"https://git.kernel.org/stable/c/a3968ad4195d72c8fddcc6c0ef39da95ac98711a"},{"url":"https://git.kernel.org/stable/c/efa9e3b9f3dea2e1ea4c7edf4edc863faef85986"},{"url":"https://git.kernel.org/stable/c/78783fefdc8f36879b1a17efa0d3195ea5f2dc5f"},{"url":"https://git.kernel.org/stable/c/6d99379c58f7f1c6ab2cc7aba01a4f52d71adcfe"},{"url":"https://git.kernel.org/stable/c/5a03a2ee17e8259dde631ed84fd8322db06cb2ae"},{"url":"https://git.kernel.org/stable/c/40f0b1047918539f0b0f795ac65e35336b4c2c78"}],"tags":["cve.org"],"epss":0.00176,"epssPercentile":0.06644,"ingestedAt":"2026-10-16T19:46:24.394Z","slug":"CVE-2026-72450","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: validate selector family and prefixlen during match\n\nsyzbot reported a shift-out-of-bounds in xfrm_selector_match()\ndue to AF_UNSPEC selector with large prefixlen (e.g. 128) matched\nagainst IPv4 flow (when XFRM_STATE_AF_UNSPEC is set).\n\nFix this by:\n\n- Rejecting mismatched families in xfrm_selector_match.\n- Returning false in addr4_match if prefixlen > 32.\n- Returning false in addr_match if prefixlen > 128 (prevents overflow).\n\n## Affected\n\n- `Linux >= 8df5cd51fd70c33aa1776e5cbcd82b0a86649d73 < 87a5bbccc7ff4edb3f42fea387124237d2ba91ee`\n- `Linux >= 2d08a6c31c65f23db71a5385ee9cf9d8f9a67a71 < bd7f202cf77556cff59f68dc30e4cdf40cb6e33b`\n- `Linux >= bce1afaa212ec380bf971614f70909a27882b862 < a3968ad4195d72c8fddcc6c0ef39da95ac98711a`\n- `Linux >= 7d9868180bd1e4cf37e7c5067362658971162366 < efa9e3b9f3dea2e1ea4c7edf4edc863faef85986`\n- `Linux >= 3f0ab59e6537c6a8f9e1b355b48f9c05a76e8563 < 78783fefdc8f36879b1a17efa0d3195ea5f2dc5f`\n- `Linux >= 3f0ab59e6537c6a8f9e1b355b48f9c05a76e8563 < 6d99379c58f7f1c6ab2cc7aba01a4f52d71adcfe`\n- `Linux >= 3f0ab59e6537c6a8f9e1b355b48f9c05a76e8563 < 5a03a2ee17e8259dde631ed84fd8322db06cb2ae`\n- `Linux >= 3f0ab59e6537c6a8f9e1b355b48f9c05a76e8563 < 40f0b1047918539f0b0f795ac65e35336b4c2c78`\n- `Linux f31398570acf0f0804c644006f7bfa9067106b0a`\n- `Linux 401ad99a5ae7180dd9449eac104cb755f442e7f3`\n- `Linux e68dd80ba498265d2266b12dc3459164f4ff0c4a`\n- `Linux >= 5.10.229 < 5.10.261`\n- `Linux >= 5.15.170 < 5.15.212`\n- `Linux >= 6.1.115 < 6.1.178`\n- `Linux >= 6.6.59 < 6.6.145`\n- `Linux >= 4.19.323 < 4.20`\n- `Linux >= 5.4.285 < 5.5`\n- `Linux >= 6.11.6 < 6.12`\n- `Linux 6.12`\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":[]}