CVE-2026-31637
9.8 CRITICALIn the Linux kernel, the following vulnerability has been resolved: rxrpc: reject undecryptable rxkad response tickets rxkad_decrypt_ti...
Published: 2026-04-24 · Last updated: 2026-06-01
Severity and scoring
- CVSS
- 9.8 CRITICAL
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
| Vendor | Product |
|---|---|
| linux | linux_kernel |
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.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-31637
- [Patch]https://git.kernel.org/stable/c/22f6258e7b31dba9bf88dce4e3ee7f0f20072e60
- [Other]https://git.kernel.org/stable/c/252157d939d179b5d767cb860ff8fa7f8723b67a
- [Patch]https://git.kernel.org/stable/c/47073aab8a3a5a7b41c9bd37d2a3dcbeeccd6c8a
- [Patch]https://git.kernel.org/stable/c/58fcd1b156152613ba00a064a129fb69507ddd7d
- [Patch]https://git.kernel.org/stable/c/a149dcae23309df9de1c3b6b5d468610ef5ab7de
- [Other]https://git.kernel.org/stable/c/a75b3b361dd481d942c5f259a82d59718a41092c
- [Other]https://git.kernel.org/stable/c/b3a808cd0790b5075aaa2bc3588edf02cd71d352
- [Patch]https://git.kernel.org/stable/c/fe4447cd95623b1cfacc15f280aab73a6d7340b2
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