CyberRota Analysis
This is a critical severity vulnerability with a CVSS score of 9.8. It affects Linux.
CVE
CVE-2026-31637
Severity
CRITICAL
CVSS
9.8
EPSS
0.51%
Linux
Original NVD 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.
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