Critical severity9.8NVD Advisory· Published Apr 24, 2026· Updated Jun 1, 2026
CVE-2026-31637
CVE-2026-31637
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
10cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 9 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=2.6.22.1,<6.6.135
- cpe:2.3:o:linux:linux_kernel:2.6.22:-:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*
- (no CPE)
Patches
Vulnerability mechanics
References
8- git.kernel.org/stable/c/22f6258e7b31dba9bf88dce4e3ee7f0f20072e60nvdPatch
- git.kernel.org/stable/c/47073aab8a3a5a7b41c9bd37d2a3dcbeeccd6c8anvdPatch
- git.kernel.org/stable/c/58fcd1b156152613ba00a064a129fb69507ddd7dnvdPatch
- git.kernel.org/stable/c/a149dcae23309df9de1c3b6b5d468610ef5ab7denvdPatch
- git.kernel.org/stable/c/fe4447cd95623b1cfacc15f280aab73a6d7340b2nvdPatch
- git.kernel.org/stable/c/252157d939d179b5d767cb860ff8fa7f8723b67anvd
- git.kernel.org/stable/c/a75b3b361dd481d942c5f259a82d59718a41092cnvd
- git.kernel.org/stable/c/b3a808cd0790b5075aaa2bc3588edf02cd71d352nvd
News mentions
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