CVE-2025-22037

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix null pointer dereference in alloc_preauth_hash() The Client send malformed smb2 negotiate request. ksmbd return error response. Subsequently, the client can send smb2 session setup even thought conn->preauth_info is not allocated. This patch add KSMBD_SESS_NEED_SETUP status of connection to ignore session setup request if smb2 negotiate phase is not complete.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/2d3461d6ae74ebdcd4d65128c855198649bcadcd
https://git.kernel.org/stable/c/8f216b33a5e1b3489c073b1ea1b3d7cb63c8dc4d	Patch
https://git.kernel.org/stable/c/b8eb243e670ecf30e91524dd12f7260dac07d335	Patch
https://git.kernel.org/stable/c/c8b5b7c5da7d0c31c9b7190b4a7bba5281fc4780	Patch
https://git.kernel.org/stable/c/ca8bed31edf728a662ef9d6f39f50e7a7dc2b5ad	Patch
https://git.kernel.org/stable/c/cce57cd8c5dead24127cf2308fdd60fcad2d6ba6	Patch
https://www.zerodayinitiative.com/advisories/ZDI-25-310/	Third Party Advisory

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::::::::

History

30 Oct 2026, 13:17

Type	Values Removed	Values Added
References		() https://git.kernel.org/stable/c/2d3461d6ae74ebdcd4d65128c855198649bcadcd -

08 Oct 2026, 00:46

Type	Values Removed	Values Added
References	~~() https://git.kernel.org/stable/c/cce57cd8c5dead24127cf2308fdd60fcad2d6ba6 -~~	() https://git.kernel.org/stable/c/cce57cd8c5dead24127cf2308fdd60fcad2d6ba6 - Patch
References	~~() https://www.zerodayinitiative.com/advisories/ZDI-25-310/ -~~	() https://www.zerodayinitiative.com/advisories/ZDI-25-310/ - Third Party Advisory

Information

Published : 2025-04-16 15:15

Updated : 2026-10-30 13:17

NVD link : CVE-2025-22037

Mitre link : CVE-2025-22037

CVE.ORG link : CVE-2025-22037

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-476

NULL Pointer Dereference

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Subsequently, the client can send smb2 session setup even\nthought conn->preauth_info is not allocated.\nThis patch add KSMBD_SESS_NEED_SETUP status of connection to ignore\nsession setup request if smb2 negotiate phase is not complete."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ksmbd: se corrige la desreferencia de puntero nulo en alloc_preauth_hash(). El cliente env\u00eda una solicitud de negociaci\u00f3n de SMB2 mal formada. ksmbd devuelve una respuesta de error. Posteriormente, el cliente puede enviar la configuraci\u00f3n de sesi\u00f3n de SMB2 incluso si conn->preauth_info no est\u00e1 asignado. Este parche a\u00f1ade el estado de conexi\u00f3n KSMBD_SESS_NEED_SETUP para ignorar la solicitud de configuraci\u00f3n de sesi\u00f3n si la fase de negociaci\u00f3n de SMB2 no se completa."}], "lastModified": "2026-10-30T13:17:55.693", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6785DAE4-776C-459F-8C86-F8ECD99CCB10", "versionEndExcluding": "6.6.107", "versionStartIncluding": "6.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "442B00D1-26AD-4DD9-B74A-E818807D3E2B", "versionEndExcluding": "6.12.23", "versionStartIncluding": "6.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E7E864B0-8C00-4679-BA55-659B4C9C3AD3", "versionEndExcluding": "6.13.11", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FADAE5D8-4808-442C-B218-77B2CE8780A0", "versionEndExcluding": "6.14.2", "versionStartIncluding": "6.14"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}