CVE-2026-31637
rxrpc: reject undecryptable rxkad response tickets
CVSS Score
9.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Apr 24, 2026 |
| Last Updated | Jun 1, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Linux / Linux
17926a79320afa9b95df6b977b40cca6d8713cea < 252157d939d179b5d767cb860ff8fa7f8723b67a 17926a79320afa9b95df6b977b40cca6d8713cea < a75b3b361dd481d942c5f259a82d59718a41092c 17926a79320afa9b95df6b977b40cca6d8713cea < b3a808cd0790b5075aaa2bc3588edf02cd71d352 17926a79320afa9b95df6b977b40cca6d8713cea < 47073aab8a3a5a7b41c9bd37d2a3dcbeeccd6c8a 17926a79320afa9b95df6b977b40cca6d8713cea < a149dcae23309df9de1c3b6b5d468610ef5ab7de 17926a79320afa9b95df6b977b40cca6d8713cea < 22f6258e7b31dba9bf88dce4e3ee7f0f20072e60 17926a79320afa9b95df6b977b40cca6d8713cea < 58fcd1b156152613ba00a064a129fb69507ddd7d 17926a79320afa9b95df6b977b40cca6d8713cea < fe4447cd95623b1cfacc15f280aab73a6d7340b2
Linux / Linux
2.6.22
References
git.kernel.org: https://git.kernel.org/stable/c/252157d939d179b5d767cb860ff8fa7f8723b67a git.kernel.org: https://git.kernel.org/stable/c/a75b3b361dd481d942c5f259a82d59718a41092c git.kernel.org: https://git.kernel.org/stable/c/b3a808cd0790b5075aaa2bc3588edf02cd71d352 git.kernel.org: https://git.kernel.org/stable/c/47073aab8a3a5a7b41c9bd37d2a3dcbeeccd6c8a git.kernel.org: https://git.kernel.org/stable/c/a149dcae23309df9de1c3b6b5d468610ef5ab7de git.kernel.org: https://git.kernel.org/stable/c/22f6258e7b31dba9bf88dce4e3ee7f0f20072e60 git.kernel.org: https://git.kernel.org/stable/c/58fcd1b156152613ba00a064a129fb69507ddd7d git.kernel.org: https://git.kernel.org/stable/c/fe4447cd95623b1cfacc15f280aab73a6d7340b2