cbcvebase.
CVE-2026-31637
published 2026-04-24

CVE-2026-31637: In the Linux kernel, the following vulnerability has been resolved: rxrpc: reject undecryptable rxkad response tickets rxkad_decrypt_ticket() decrypts the…

PriorityP350critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
0.51%
40.4th percentile
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

64 ranges· showing 25
VendorProductVersion rangeFixed in
linuxlinux
linuxlinux>= 17926a79320afa9b95df6b977b40cca6d8713cea < 252157d939d179b5d767cb860ff8fa7f8723b67a252157d939d179b5d767cb860ff8fa7f8723b67a
linuxlinux>= 17926a79320afa9b95df6b977b40cca6d8713cea < a75b3b361dd481d942c5f259a82d59718a41092ca75b3b361dd481d942c5f259a82d59718a41092c
linuxlinux>= 17926a79320afa9b95df6b977b40cca6d8713cea < b3a808cd0790b5075aaa2bc3588edf02cd71d352b3a808cd0790b5075aaa2bc3588edf02cd71d352
linuxlinux>= 17926a79320afa9b95df6b977b40cca6d8713cea < 47073aab8a3a5a7b41c9bd37d2a3dcbeeccd6c8a47073aab8a3a5a7b41c9bd37d2a3dcbeeccd6c8a
linuxlinux>= 17926a79320afa9b95df6b977b40cca6d8713cea < a149dcae23309df9de1c3b6b5d468610ef5ab7dea149dcae23309df9de1c3b6b5d468610ef5ab7de
linuxlinux>= 17926a79320afa9b95df6b977b40cca6d8713cea < 22f6258e7b31dba9bf88dce4e3ee7f0f20072e6022f6258e7b31dba9bf88dce4e3ee7f0f20072e60
linuxlinux>= 17926a79320afa9b95df6b977b40cca6d8713cea < 58fcd1b156152613ba00a064a129fb69507ddd7d58fcd1b156152613ba00a064a129fb69507ddd7d
linuxlinux>= 17926a79320afa9b95df6b977b40cca6d8713cea < fe4447cd95623b1cfacc15f280aab73a6d7340b2fe4447cd95623b1cfacc15f280aab73a6d7340b2
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel>= 2.6.22.1 < 6.6.1356.6.135
linuxlinux_kernel>= 6.13 < 6.18.236.18.23
linuxlinux_kernel>= 6.19 < 6.19.136.19.13
linuxlinux_kernel>= 6.7 < 6.12.826.12.82
ubuntulinux
ubuntulinux-aws
ubuntulinux-aws-5.15
ubuntulinux-aws-6.8
ubuntulinux-aws-fips
ubuntulinux-azure
ubuntulinux-azure-4.15
ubuntulinux-azure-5.15
ubuntulinux-azure-fde-5.15

CVSS provenance

nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vendor_ubuntu8.8HIGH
vendor_redhat7.0MEDIUM
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