CVE-2025-21946

ksmbd: fix out-of-bounds in parse_sec_desc()

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix out-of-bounds in parse_sec_desc() If osidoffset, gsidoffset and dacloffset could be greater than smb_ntsd struct size. If it is smaller, It could cause slab-out-of-bounds. And when validating sid, It need to check it included subauth array size.

N/A

CVSS

Severity:

EPSS 0.03%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/c1569dbbe2d43041be9f3fef7ca08bec3b66ad1b
https://git.kernel.org/stable/c/159d059cbcb0e6d0e7a7b34af3862ba09a6b22d1
https://git.kernel.org/stable/c/6a9831180d0b23b5c97e2bd841aefc8f82900172
https://git.kernel.org/stable/c/d6e13e19063db24f94b690159d0633aaf72a0f03

Frequently Asked Questions

What is the severity of CVE-2025-21946?: CVE-2025-21946 has not yet been assigned a CVSS score.
How to fix CVE-2025-21946?: To fix CVE-2025-21946, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-21946 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2025-21946 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-21946?: CVE-2025-21946 affects Linux Linux, Linux Linux.

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