CVE-2026-31637

{"id": "CVE-2026-31637", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-31637", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T15:11:24.761157Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "17926a79320afa9b95df6b977b40cca6d8713cea", "lessThan": "252157d939d179b5d767cb860ff8fa7f8723b67a", "versionType": "git"}, {"status": "affected", "version": "17926a79320afa9b95df6b977b40cca6d8713cea", "lessThan": "a75b3b361dd481d942c5f259a82d59718a41092c", "versionType": "git"}, {"status": "affected", "version": "17926a79320afa9b95df6b977b40cca6d8713cea", "lessThan": "b3a808cd0790b5075aaa2bc3588edf02cd71d352", "versionType": "git"}, {"status": "affected", "version": "17926a79320afa9b95df6b977b40cca6d8713cea", "lessThan": "47073aab8a3a5a7b41c9bd37d2a3dcbeeccd6c8a", "versionType": "git"}, {"status": "affected", "version": "17926a79320afa9b95df6b977b40cca6d8713cea", "lessThan": "a149dcae23309df9de1c3b6b5d468610ef5ab7de", "versionType": "git"}, {"status": "affected", "version": "17926a79320afa9b95df6b977b40cca6d8713cea", "lessThan": "22f6258e7b31dba9bf88dce4e3ee7f0f20072e60", "versionType": "git"}, {"status": "affected", "version": "17926a79320afa9b95df6b977b40cca6d8713cea", "lessThan": "58fcd1b156152613ba00a064a129fb69507ddd7d", "versionType": "git"}, {"status": "affected", "version": "17926a79320afa9b95df6b977b40cca6d8713cea", "lessThan": "fe4447cd95623b1cfacc15f280aab73a6d7340b2", "versionType": "git"}], "programFiles": ["net/rxrpc/rxkad.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "2.6.22"}, {"status": "unaffected", "version": "0", "lessThan": "2.6.22", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.258", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.209", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.175", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.135", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.82", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.23", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "6.19.13", "versionType": "semver", "lessThanOrEqual": "6.19.*"}, {"status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/rxrpc/rxkad.c"], "defaultStatus": "affected"}]}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "affectedData": [{"vendor": "Siemens", "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem", "versions": [{"status": "affected", "version": "0", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}]}], "published": "2026-04-24T15:16:43.020", "references": [{"url": "https://git.kernel.org/stable/c/22f6258e7b31dba9bf88dce4e3ee7f0f20072e60", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/252157d939d179b5d767cb860ff8fa7f8723b67a", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/47073aab8a3a5a7b41c9bd37d2a3dcbeeccd6c8a", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/58fcd1b156152613ba00a064a129fb69507ddd7d", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a149dcae23309df9de1c3b6b5d468610ef5ab7de", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a75b3b361dd481d942c5f259a82d59718a41092c", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b3a808cd0790b5075aaa2bc3588edf02cd71d352", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/fe4447cd95623b1cfacc15f280aab73a6d7340b2", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html", "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}, {"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-754"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad:\n\nrxrpc: rechazar tickets de respuesta rxkad indescifrables\n\nrxkad_decrypt_ticket() descifra el ticket de respuesta RXKAD y luego analiza el b\u00fafer como texto plano sin comprobar si crypto_skcipher_decrypt() tuvo \u00e9xito.\n\nUna RESPUESTA malformada puede, por lo tanto, usar una longitud de ticket no alineada con el bloque, hacer que la operaci\u00f3n de descifrado falle y a\u00fan as\u00ed dirigir el analizador de tickets con bytes controlados por el atacante.\n\nComprobar el resultado del descifrado y abortar la conexi\u00f3n con RXKADBADTICKET cuando el descifrado del ticket falla."}], "lastModified": "2026-11-11T23:10:00.263", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CF3437DE-9B4D-4F70-8EDD-552E0695376B", "versionEndExcluding": "6.6.135", "versionStartIncluding": "2.6.22.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "02904CAE-71D2-45B3-9EC3-F6A9D18B6307", "versionEndExcluding": "6.12.82", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E9E09FDD-9EE3-4A56-92E2-2B30AFD0072F", "versionEndExcluding": "6.18.23", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1490EF9B-9080-481C-8D22-1306AAE664E4", "versionEndExcluding": "6.19.13", "versionStartIncluding": "6.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:2.6.22:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7F7D6C66-3384-4ACC-9D08-C5A26B4FD004"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F666C8D8-6538-46D4-B318-87610DE64C34"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "02259FDA-961B-47BC-AE7F-93D7EC6E90C2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "58A9FEFF-C040-420D-8F0A-BFDAAA1DF258"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1D2315C0-D46F-4F85-9754-F9E5E11374A6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "512EE3A8-A590-4501-9A94-5D4B268D6138"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}