{"id":"CVE-2026-31637","revision":"6d1872a409f6470b88487075e26c6407","records":[{"revision":"6d1872a409f6470b88487075e26c6407","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-31637","aliases":[],"title":"rxrpc: reject undecryptable rxkad response tickets","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: reject undecryptable rxkad response tickets\n\nrxkad_decrypt_ticket() decrypts the RXKAD response ticket and then\nparses the buffer as plaintext without checking whether\ncrypto_skcipher_decrypt() succeeded.\n\nA malformed RESPONSE can therefore use a non-block-aligned ticket\nlength, make the decrypt operation fail, and still drive the ticket\nparser with attacker-controlled bytes.\n\nCheck the decrypt result and abort the connection with RXKADBADTICKET\nwhen ticket decryption fails.","state":0,"publishedAt":"2026-04-24T14:44:51.364+00:00","modifiedAt":"2026-10-19T18:56:01.051+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/rxrpc/rxkad.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"17926a79320afa9b95df6b977b40cca6d8713cea\",\n                            \"lessThan\": \"252157d939d179b5d767cb860ff8fa7f8723b67a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"17926a79320afa9b95df6b977b40cca6d8713cea\",\n                            \"lessThan\": \"a75b3b361dd481d942c5f259a82d59718a41092c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"17926a79320afa9b95df6b977b40cca6d8713cea\",\n                            \"lessThan\": \"b3a808cd0790b5075aaa2bc3588edf02cd71d352\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"17926a79320afa9b95df6b977b40cca6d8713cea\",\n                            \"lessThan\": \"47073aab8a3a5a7b41c9bd37d2a3dcbeeccd6c8a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"17926a79320afa9b95df6b977b40cca6d8713cea\",\n                            \"lessThan\": \"a149dcae23309df9de1c3b6b5d468610ef5ab7de\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"17926a79320afa9b95df6b977b40cca6d8713cea\",\n                            \"lessThan\": \"22f6258e7b31dba9bf88dce4e3ee7f0f20072e60\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"17926a79320afa9b95df6b977b40cca6d8713cea\",\n                            \"lessThan\": \"58fcd1b156152613ba00a064a129fb69507ddd7d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"17926a79320afa9b95df6b977b40cca6d8713cea\",\n                            \"lessThan\": \"fe4447cd95623b1cfacc15f280aab73a6d7340b2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/rxrpc/rxkad.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2.6.22\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.6.22\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.258\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.209\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.175\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.135\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.82\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.23\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.19.13\",\n                            \"lessThanOrEqual\": \"6.19.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8,"severity":"CRITICAL"}],"references":["https://git.kernel.org/stable/c/252157d939d179b5d767cb860ff8fa7f8723b67a","https://git.kernel.org/stable/c/a75b3b361dd481d942c5f259a82d59718a41092c","https://git.kernel.org/stable/c/b3a808cd0790b5075aaa2bc3588edf02cd71d352","https://git.kernel.org/stable/c/47073aab8a3a5a7b41c9bd37d2a3dcbeeccd6c8a","https://git.kernel.org/stable/c/a149dcae23309df9de1c3b6b5d468610ef5ab7de","https://git.kernel.org/stable/c/22f6258e7b31dba9bf88dce4e3ee7f0f20072e60","https://git.kernel.org/stable/c/58fcd1b156152613ba00a064a129fb69507ddd7d","https://git.kernel.org/stable/c/fe4447cd95623b1cfacc15f280aab73a6d7340b2"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-31637","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-31637","identifiers":["CVE-2026-31637"]},"retained":false,"historicalAffected":[]}],"coverage":[]}