CVE-2026-31637

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 v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

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

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	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::::::

History

No history.

Information

Published : 2026-04-24 15:16

Updated : 2026-06-17 10:34

NVD link : CVE-2026-31637

Mitre link : CVE-2026-31637

CVE.ORG link : CVE-2026-31637

JSON object : View

Products Affected

linux

linux_kernel

CWE

NVD-CWE-noinfo

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checking whether\ncrypto_skcipher_decrypt() succeeded.\n\nA malformed RESPONSE can therefore use a non-block-aligned ticket\nlength, make the decrypt operation fail, and still drive the ticket\nparser with attacker-controlled bytes.\n\nCheck the decrypt result and abort the connection with RXKADBADTICKET\nwhen ticket decryption fails."}], "lastModified": "2026-06-17T10:34:08.387", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CF3437DE-9B4D-4F70-8EDD-552E0695376B", "versionEndExcluding": "6.6.135", "versionStartIncluding": "2.6.22.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "02904CAE-71D2-45B3-9EC3-F6A9D18B6307", "versionEndExcluding": "6.12.82", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": 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