CVE-2025-38562

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-38562
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix null pointer dereference error in generate_encryptionkey If client send two session setups with krb5 authenticate to ksmbd, null pointer dereference error in generate_encryptionkey could happen. sess->Preauth_HashValue is set to NULL if session is valid. So this patch skip generate encryption key if session is valid.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/015ef163d65496ae3ba6192c96140a22743f0353 Patch
https://git.kernel.org/stable/c/2a30ed6428ce83afedca1a6c5c5c4247bcf12d0e Patch
https://git.kernel.org/stable/c/96a82e19434a2522525baab59c33332658bc7653 Patch
https://git.kernel.org/stable/c/9b493ab6f35178afd8d619800df9071992f715de Patch
https://git.kernel.org/stable/c/9c2dbbc959e1fcc6f603a1a843e9cf743ba383bb Patch
https://git.kernel.org/stable/c/d79c8bebaa622ee223128be7c66d8aaeeb634a57 Patch
https://www.zerodayinitiative.com/advisories/ZDI-25-917/ Third Party Advisory Mailing List
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html Third Party Advisory Mailing List
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:*:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
History

08 Jan 2026, 20:51

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CPE cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
References () https://git.kernel.org/stable/c/015ef163d65496ae3ba6192c96140a22743f0353 - () https://git.kernel.org/stable/c/015ef163d65496ae3ba6192c96140a22743f0353 - Patch
References () https://git.kernel.org/stable/c/2a30ed6428ce83afedca1a6c5c5c4247bcf12d0e - () https://git.kernel.org/stable/c/2a30ed6428ce83afedca1a6c5c5c4247bcf12d0e - Patch
References () https://git.kernel.org/stable/c/96a82e19434a2522525baab59c33332658bc7653 - () https://git.kernel.org/stable/c/96a82e19434a2522525baab59c33332658bc7653 - Patch
References () https://git.kernel.org/stable/c/9b493ab6f35178afd8d619800df9071992f715de - () https://git.kernel.org/stable/c/9b493ab6f35178afd8d619800df9071992f715de - Patch
References () https://git.kernel.org/stable/c/9c2dbbc959e1fcc6f603a1a843e9cf743ba383bb - () https://git.kernel.org/stable/c/9c2dbbc959e1fcc6f603a1a843e9cf743ba383bb - Patch
References () https://git.kernel.org/stable/c/d79c8bebaa622ee223128be7c66d8aaeeb634a57 - () https://git.kernel.org/stable/c/d79c8bebaa622ee223128be7c66d8aaeeb634a57 - Patch
References () https://www.zerodayinitiative.com/advisories/ZDI-25-917/ - () https://www.zerodayinitiative.com/advisories/ZDI-25-917/ - Third Party Advisory, Mailing List
References () https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html - () https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html - Third Party Advisory, Mailing List
CWE CWE-476
First Time Linux
Debian
Debian debian Linux
Linux linux Kernel

03 Nov 2025, 18:16

Type Values Removed Values Added
References
  • () https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html -

10 Oct 2025, 16:15

Type Values Removed Values Added
References
  • () https://www.zerodayinitiative.com/advisories/ZDI-25-917/ -

20 Aug 2025, 14:40

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ksmbd: se corrige el error de desreferencia de puntero nulo en generate_encryptionkey. Si el cliente envía dos configuraciones de sesión con autenticación krb5 a ksmbd, podría producirse un error de desreferencia de puntero nulo en generate_encryptionkey. "sess->Preauth_HashValue" se establece en NULL si la sesión es válida. Por lo tanto, este parche omite la generación de la clave de cifrado si la sesión es válida.

19 Aug 2025, 17:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-08-19 17:15

Updated : 2026-01-08 20:51

NVD link : CVE-2025-38562

Mitre link : CVE-2025-38562

CVE.ORG link : CVE-2025-38562

JSON object : View

Products Affected

debian

  • debian_linux

linux

  • linux_kernel
CWE
CWE-476

NULL Pointer Dereference