What is the severity of CVE-2025-22039?

The severity of CVE-2025-22039 is considered moderate due to potential overflow issues.

How do I fix CVE-2025-22039?

To fix CVE-2025-22039, users should update their Linux kernel to the latest patched version.

Which Linux versions are affected by CVE-2025-22039?

CVE-2025-22039 affects several versions of the Linux kernel that utilize the ksmbd module.

What are the implications of CVE-2025-22039?

CVE-2025-22039 could allow an attacker to exploit an overflow to bypass permission checks.

Is CVE-2025-22039 publicly known?

Yes, CVE-2025-22039 has been publicly disclosed and documented.

Vulnerability/
CVE-2025-22039

16/4/2025

30/4/2025

CVE-2025-22039: ksmbd: fix overflow in dacloffset bounds check

First published: Wed Apr 16 2025(Updated: )

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.

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Affected Software	Affected Version	How to fix
Linux Kernel

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Reference Links

Frequently Asked Questions

What is the severity of CVE-2025-22039?
The severity of CVE-2025-22039 is considered moderate due to potential overflow issues.
How do I fix CVE-2025-22039?
To fix CVE-2025-22039, users should update their Linux kernel to the latest patched version.
Which Linux versions are affected by CVE-2025-22039?
CVE-2025-22039 affects several versions of the Linux kernel that utilize the ksmbd module.
What are the implications of CVE-2025-22039?
CVE-2025-22039 could allow an attacker to exploit an overflow to bypass permission checks.
Is CVE-2025-22039 publicly known?
Yes, CVE-2025-22039 has been publicly disclosed and documented.

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Frequently Asked Questions

What is the severity of CVE-2025-22039?
The severity of CVE-2025-22039 is considered moderate due to potential overflow issues.
How do I fix CVE-2025-22039?
To fix CVE-2025-22039, users should update their Linux kernel to the latest patched version.
Which Linux versions are affected by CVE-2025-22039?
CVE-2025-22039 affects several versions of the Linux kernel that utilize the ksmbd module.
What are the implications of CVE-2025-22039?
CVE-2025-22039 could allow an attacker to exploit an overflow to bypass permission checks.
Is CVE-2025-22039 publicly known?
Yes, CVE-2025-22039 has been publicly disclosed and documented.