CVE-2026-31637

CRITICAL EPSS 39.9%
Published Apr 24, 20262mo ago · Modified Jun 17, 20261w ago
9.8 CVSS 3.1
Critical
Find Similar
Published Apr 24, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
9.8
Exploitability
3.9
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
39.9% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 12

VendorProductVersionRange
linuxlinux_kernel*≥2.6.22.1  –  <6.6.135
linuxlinux_kernel*≥6.7  –  <6.12.82
linuxlinux_kernel*≥6.13  –  <6.18.23
linuxlinux_kernel*≥6.19  –  <6.19.13
linuxlinux_kernel2.6.22any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any

References 8

  • git.kernel.org https://git.kernel.org/stable/c/22f6258e7b31dba9bf88dce4e3ee7f0f20072e60
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/252157d939d179b5d767cb860ff8fa7f8723b67a
  • git.kernel.org https://git.kernel.org/stable/c/47073aab8a3a5a7b41c9bd37d2a3dcbeeccd6c8a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/58fcd1b156152613ba00a064a129fb69507ddd7d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a149dcae23309df9de1c3b6b5d468610ef5ab7de
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a75b3b361dd481d942c5f259a82d59718a41092c
  • git.kernel.org https://git.kernel.org/stable/c/b3a808cd0790b5075aaa2bc3588edf02cd71d352
  • git.kernel.org https://git.kernel.org/stable/c/fe4447cd95623b1cfacc15f280aab73a6d7340b2
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/22f6258e7b31dba9bf88dce4e3ee7f0f20072e60
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/47073aab8a3a5a7b41c9bd37d2a3dcbeeccd6c8a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/58fcd1b156152613ba00a064a129fb69507ddd7d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a149dcae23309df9de1c3b6b5d468610ef5ab7de
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fe4447cd95623b1cfacc15f280aab73a6d7340b2
    Patch