What’s Vulnerable › Vulnerabilities

CVE-2023-52441: ksmbd: fix out of bounds in init_smb2_rsp_hdr()

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-02-21 · updated 2026-08-15
• Weakness: CWE-119

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix out of bounds in init_smb2_rsp_hdr() If client send smb2 negotiate request and then send smb1 negotiate request, init_smb2_rsp_hdr is called for smb1 negotiate request since need_neg is set to false. This patch ignore smb1 packets after ->need_neg is set to false.

Affected products

• Linux kernel: from 5.15.0 before 5.15.145; from 5.16.0 before 6.1.53; from 6.2.0 before 6.4.16 — fixed in 5.15.145, 6.1.53, 6.4.16

How to fix

Upgrade to a fixed version: Linux kernel 5.15.145, 6.1.53, 6.4.16. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/330d900620dfc9893011d725b3620cd2ee0bc2bc
• https://git.kernel.org/stable/c/536bb492d39bb6c080c92f31e8a55fe9934f452b
• https://git.kernel.org/stable/c/5c0df9d30c289d6b9d7d44e2a450de2f8e3cf40b
• https://git.kernel.org/stable/c/aa669ef229ae8dd779da9caa24e254964545895f
• https://git.kernel.org/stable/c/330d900620dfc9893011d725b3620cd2ee0bc2bc
• https://git.kernel.org/stable/c/536bb492d39bb6c080c92f31e8a55fe9934f452b
• https://git.kernel.org/stable/c/5c0df9d30c289d6b9d7d44e2a450de2f8e3cf40b
• https://git.kernel.org/stable/c/aa669ef229ae8dd779da9caa24e254964545895f

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