CVE-2026-31637
critical · 9.8In 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.
9.8
CVSS
0.5%
EPSS (exploit prob.)
43rd
EPSS percentile
2026-04-24
Published
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| linux | linux_kernel | >= 2.6.22.1, < 6.6.135 |
| linux | linux_kernel | >= 6.7, < 6.12.82 |
| linux | linux_kernel | >= 6.13, < 6.18.23 |
| linux | linux_kernel | >= 6.19, < 6.19.13 |
| linux | linux_kernel | 2.6.22 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
Check a specific version with /api/v1/cve/match.
References
- https://git.kernel.org/stable/c/22f6258e7b31dba9bf88dce4e3ee7f0f20072e60
- https://git.kernel.org/stable/c/252157d939d179b5d767cb860ff8fa7f8723b67a
- https://git.kernel.org/stable/c/47073aab8a3a5a7b41c9bd37d2a3dcbeeccd6c8a
- https://git.kernel.org/stable/c/58fcd1b156152613ba00a064a129fb69507ddd7d
- https://git.kernel.org/stable/c/a149dcae23309df9de1c3b6b5d468610ef5ab7de
- https://git.kernel.org/stable/c/a75b3b361dd481d942c5f259a82d59718a41092c
- https://git.kernel.org/stable/c/b3a808cd0790b5075aaa2bc3588edf02cd71d352
- https://git.kernel.org/stable/c/fe4447cd95623b1cfacc15f280aab73a6d7340b2
Query this programmatically:
curl https://evil-db.io/api/v1/cve/CVE-2026-31637