{"id":"CVE-2026-31633","title":"rxrpc: Fix integer overflow in rxgk_verify_response()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: Fix integer overflow in rxgk_verify_response()\n\nIn rxgk_verify_response(), there's a potential integer overflow due to\nrounding up token_len before checking it, …","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a < 1f864d9daaf622aeaa774404fd51e7d6a435b046","Linux >= 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a < c1e242beb6b1efc3c286f617e8d940c8fbf2ed41","Linux >= 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a < 699e52180f4231c257821c037ed5c99d5eb0edb8","Linux 6.16"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-10-16T15:11:22.560304Z"},"published":"2026-04-24","updated":"2026-10-16","sourceUpdated":"2026-10-16T15:20:17.544Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-31633","references":[{"url":"https://git.kernel.org/stable/c/1f864d9daaf622aeaa774404fd51e7d6a435b046"},{"url":"https://git.kernel.org/stable/c/c1e242beb6b1efc3c286f617e8d940c8fbf2ed41"},{"url":"https://git.kernel.org/stable/c/699e52180f4231c257821c037ed5c99d5eb0edb8"}],"tags":["cve.org"],"epss":0.00469,"epssPercentile":0.39178,"ingestedAt":"2026-10-16T17:24:46.665Z","slug":"CVE-2026-31633","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: Fix integer overflow in rxgk_verify_response()\n\nIn rxgk_verify_response(), there's a potential integer overflow due to\nrounding up token_len before checking it, thereby allowing the length check to\nbe bypassed.\n\nFix this by checking the unrounded value against len too (len is limited as\nthe response must fit in a single UDP packet).\n\n## Affected\n\n- `Linux >= 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a < 1f864d9daaf622aeaa774404fd51e7d6a435b046`\n- `Linux >= 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a < c1e242beb6b1efc3c286f617e8d940c8fbf2ed41`\n- `Linux >= 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a < 699e52180f4231c257821c037ed5c99d5eb0edb8`\n- `Linux 6.16`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}