What’s Vulnerable › Vulnerabilities

CVE-2023-52755: ksmbd: fix slab out of bounds write in smb_inherit_dacl()

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 28.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-05-21 · updated 2026-08-04
• Weakness: CWE-787

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix slab out of bounds write in smb_inherit_dacl() slab out-of-bounds write is caused by that offsets is bigger than pntsd allocation size. This patch add the check to validate 3 offsets using allocation size.

Affected products

• Linux kernel: from 5.15 before 5.15.140; from 5.16 before 6.1.64; from 6.2 before 6.5.13; from 6.6 before 6.6.3 — fixed in 5.15.140, 6.1.64, 6.5.13, 6.6.3

How to fix

Upgrade to a fixed version: Linux kernel 5.15.140, 6.1.64, 6.5.13, 6.6.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/09d9d8b40a3338193619c14ed4dc040f4f119e70
• https://git.kernel.org/stable/c/712e01f32e577e7e48ab0adb5fe550646a3d93cb
• https://git.kernel.org/stable/c/8387c94d73ec66eb597c7a23a8d9eadf64bfbafa
• https://git.kernel.org/stable/c/aaf0a07d60887d6c36fc46a24de0083744f07819
• https://git.kernel.org/stable/c/eebff19acaa35820cb09ce2ccb3d21bee2156ffb
• https://git.kernel.org/stable/c/09d9d8b40a3338193619c14ed4dc040f4f119e70
• https://git.kernel.org/stable/c/712e01f32e577e7e48ab0adb5fe550646a3d93cb
• https://git.kernel.org/stable/c/8387c94d73ec66eb597c7a23a8d9eadf64bfbafa
• https://git.kernel.org/stable/c/aaf0a07d60887d6c36fc46a24de0083744f07819
• https://git.kernel.org/stable/c/eebff19acaa35820cb09ce2ccb3d21bee2156ffb

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