CVE-2025-40129
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-11-12

Last updated on: 2025-11-12

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: sunrpc: fix null pointer dereference on zero-length checksum In xdr_stream_decode_opaque_auth(), zero-length checksum.len causes checksum.data to be set to NULL. This triggers a NPD when accessing checksum.data in gss_krb5_verify_mic_v2(). This patch ensures that the value of checksum.len is not less than XDR_UNIT.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2025-11-12
Last Modified
2025-11-12
Generated
2026-05-07
AI Q&A
2025-11-13
EPSS Evaluated
2026-05-05
NVD
CVE-2025-40129
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-UNKNOWN
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability is a null pointer dereference in the Linux kernel's sunrpc component. Specifically, in the function xdr_stream_decode_opaque_auth(), when a zero-length checksum is processed, the checksum.data pointer is set to NULL. Later, when gss_krb5_verify_mic_v2() tries to access this NULL pointer, it causes a null pointer dereference, which can lead to a crash or other unintended behavior. The fix ensures that the checksum length is never less than a defined minimum (XDR_UNIT), preventing checksum.data from being NULL.


How can this vulnerability impact me? :

This vulnerability can cause a null pointer dereference in the Linux kernel, potentially leading to a system crash or denial of service. This could disrupt normal operations on affected systems using the sunrpc component, impacting availability.


Ask Our AI Assistant
Need more information? Ask your question to get an AI reply (Powered by our expertise)
0/70
EPSS Chart