CVE-2025-38562
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-08-19

Last updated on: 2026-04-18

Assigner: kernel.org

Description
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.
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Meta Information
Published
2025-08-19
Last Modified
2026-04-18
Generated
2026-05-27
AI Q&A
2025-08-19
EPSS Evaluated
2026-05-25
NVD
CVE-2025-38562
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux kernel 6.1.153-1
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability is a null pointer dereference error in the Linux kernel's ksmbd component, specifically in the generate_encryptionkey function. It occurs when a client sends two session setups with krb5 authentication to ksmbd. If the session is valid, the Preauth_HashValue is set to NULL, which can cause the generate_encryptionkey function to dereference a null pointer, potentially leading to a crash or denial of service. The patch fixes this by skipping the encryption key generation if the session is valid.


How can this vulnerability impact me? :

This vulnerability can cause a null pointer dereference in the ksmbd service, which may lead to a denial of service by crashing the service or the kernel. This could disrupt normal operations on systems using ksmbd with krb5 authentication, potentially affecting availability.


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