CVE-2026-31637
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 17926a79320afa9b95df6b977b40cca6d8713cea < 252157d939d179b5d767cb860ff8fa7f8723b67a | affected |
| Linux | Linux | 17926a79320afa9b95df6b977b40cca6d8713cea < a75b3b361dd481d942c5f259a82d59718a41092c | affected |
| Linux | Linux | 17926a79320afa9b95df6b977b40cca6d8713cea < b3a808cd0790b5075aaa2bc3588edf02cd71d352 | affected |
| Linux | Linux | 17926a79320afa9b95df6b977b40cca6d8713cea < 47073aab8a3a5a7b41c9bd37d2a3dcbeeccd6c8a | affected |
| Linux | Linux | 17926a79320afa9b95df6b977b40cca6d8713cea < a149dcae23309df9de1c3b6b5d468610ef5ab7de | affected |
| Linux | Linux | 17926a79320afa9b95df6b977b40cca6d8713cea < 22f6258e7b31dba9bf88dce4e3ee7f0f20072e60 | affected |
| Linux | Linux | 17926a79320afa9b95df6b977b40cca6d8713cea < 58fcd1b156152613ba00a064a129fb69507ddd7d | affected |
| Linux | Linux | 17926a79320afa9b95df6b977b40cca6d8713cea < fe4447cd95623b1cfacc15f280aab73a6d7340b2 | affected |
| Linux | Linux | 2.6.22 | affected |
| Linux | Linux | 0 < 2.6.22 | unaffected |
| Linux | Linux | 5.10.258 <= 5.10.* | unaffected |
| Linux | Linux | 5.15.209 <= 5.15.* | unaffected |
| Linux | Linux | 6.1.175 <= 6.1.* | unaffected |
| Linux | Linux | 6.6.135 <= 6.6.* | unaffected |
| Linux | Linux | 6.12.82 <= 6.12.* | unaffected |
| Linux | Linux | 6.18.23 <= 6.18.* | unaffected |
| Linux | Linux | 6.19.13 <= 6.19.* | unaffected |
| Linux | Linux | 7.0 <= * | unaffected |
Weaknesses
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
Feedback
Was this page helpful?
Glad to hear it! Please tell us how we can improve.
Sorry to hear that. Please tell us how we can improve.