Description
In the Linux kernel, the following vulnerability has been resolved: rxrpc: reject undecryptable rxkad response tickets rxkad_decrypt_ticket() decrypts the RXKAD response ticket and then parses the buffer as plaintext without checking whether crypto_skcipher_decrypt() succeeded. A malformed RESPONSE can therefore use a non-block-aligned ticket length, make the decrypt operation fail, and still drive the ticket parser with attacker-controlled bytes. Check the decrypt result and abort the connection with RXKADBADTICKET when ticket decryption fails.
References
- www.cve.org/CVERecord ↗
- nvd.nist.gov/vuln/detail/CVE-2026-31637 ↗
- git.kernel.org/stable/c/22f6258e7b31dba9bf88dce4e3ee7f0f20072e60 ↗
- git.kernel.org/stable/c/252157d939d179b5d767cb860ff8fa7f8723b67a ↗
- git.kernel.org/stable/c/47073aab8a3a5a7b41c9bd37d2a3dcbeeccd6c8a ↗
- git.kernel.org/stable/c/58fcd1b156152613ba00a064a129fb69507ddd7d ↗
- git.kernel.org/stable/c/a149dcae23309df9de1c3b6b5d468610ef5ab7de ↗
- git.kernel.org/stable/c/a75b3b361dd481d942c5f259a82d59718a41092c ↗
- git.kernel.org/stable/c/b3a808cd0790b5075aaa2bc3588edf02cd71d352 ↗
- git.kernel.org/stable/c/fe4447cd95623b1cfacc15f280aab73a6d7340b2 ↗
- cert-portal.siemens.com/productcert/html/ssa-784472.html ↗
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This product uses the NVD API but is not endorsed or certified by the NVD. CVSS scores do not establish exploitation.