CVE-2024-56627 ksmbd: fix Out-of-Bounds Read in ksmbd_vfs_stream_read

What is CVE-2024-56627?

CVE-2024-56627 is a high-severity memory corruption vulnerability in Linux kernel, published on 27 Dec 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 Out-of-Bounds Read in ksmbd_vfs_stream_read

An offset from client could be a negative value, It could lead to an out-of-bounds read from the stream_buf. Note that this issue is coming when setting 'vfs objects = streams_xattr parameter' in ksmbd.conf.

Weakness: CWE-125

Which versions are affected by CVE-2024-56627?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-56627?

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-2024-56627 being exploited?

There is no known exploitation of CVE-2024-56627 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 BELL-CVE-2024-56627, DEBIAN-CVE-2024-56627, GHSA-7822-7h76-h235, UBUNTU-CVE-2024-56627.