CVE-2024-26954 ksmbd: fix slab-out-of-bounds in smb_strndup_from_utf16()

What is CVE-2024-26954?

CVE-2024-26954 is a high-severity memory corruption vulnerability in Linux kernel, published on 1 May 2024. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

In the Linux kernel, the following vulnerability has been resolved:

ksmbd: fix slab-out-of-bounds in smb_strndup_from_utf16()

If ->NameOffset of smb2_create_req is smaller than Buffer offset of smb2_create_req, slab-out-of-bounds read can happen from smb2_open. This patch set the minimum value of the name offset to the buffer offset to validate name length of smb2_create_req().

Weakness: CWE-125

Which versions are affected by CVE-2024-26954?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-26954?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2024-26954 being exploited?

There is no known exploitation of CVE-2024-26954 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-57714, BELL-CVE-2024-26954, DEBIAN-CVE-2024-26954, GHSA-9r3r-9pph-j34p, ROOT-OS-UBUNTU-2204-CVE-2024-26954, UBUNTU-CVE-2024-26954.