CVE-2025-22039

ksmbd: fix overflow in dacloffset bounds check

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix overflow in dacloffset bounds check The dacloffset field was originally typed as int and used in an unchecked addition, which could overflow and bypass the existing bounds check in both smb_check_perm_dacl() and smb_inherit_dacl(). This could result in out-of-bounds memory access and a kernel crash when dereferencing the DACL pointer. This patch converts dacloffset to unsigned int and uses check_add_overflow() to validate access to the DACL.

N/A

CVSS

Severity:

EPSS 0.03%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/6a9cd9ff0fa2bcc30b2bfb8bdb161eb20e44b9dc
https://git.kernel.org/stable/c/6b8d379048b168a0dff5ab1acb975b933f368514
https://git.kernel.org/stable/c/443b373a4df5a2cb9f7b8c4658b2afedeb16397f
https://git.kernel.org/stable/c/beff0bc9d69bc8e733f9bca28e2d3df5b3e10e42

Frequently Asked Questions

What is the severity of CVE-2025-22039?: CVE-2025-22039 has not yet been assigned a CVSS score.
How to fix CVE-2025-22039?: To fix CVE-2025-22039, 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-2025-22039 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2025-22039 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-2025-22039?: CVE-2025-22039 affects Linux Linux, Linux Linux.

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