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.
Affected products
linux: linux kernel
References9
- git.kernel.org/stable/c/22f6258e7b31dba9bf88dce4e3ee7f0f20072e60 Patch
- git.kernel.org/stable/c/47073aab8a3a5a7b41c9bd37d2a3dcbeeccd6c8a Patch
- git.kernel.org/stable/c/58fcd1b156152613ba00a064a129fb69507ddd7d Patch
- git.kernel.org/stable/c/a149dcae23309df9de1c3b6b5d468610ef5ab7de Patch
- git.kernel.org/stable/c/fe4447cd95623b1cfacc15f280aab73a6d7340b2 Patch
- git.kernel.org/stable/c/252157d939d179b5d767cb860ff8fa7f8723b67a
- git.kernel.org/stable/c/a75b3b361dd481d942c5f259a82d59718a41092c
- git.kernel.org/stable/c/b3a808cd0790b5075aaa2bc3588edf02cd71d352
- cert-portal.siemens.com/productcert/html/ssa-784472.html
Metrics
- CVSS 3.1
-
9.8
CRITICAL
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 1% percentile: 49 · as of 13 November 2026
- CWE
- CWE-754
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.