CVE-2024-26791 btrfs: dev-replace: properly validate device names

What is CVE-2024-26791?

CVE-2024-26791 is a high-severity vulnerability in Linux kernel, published on 4 Apr 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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

btrfs: dev-replace: properly validate device names

There's a syzbot report that device name buffers passed to device replace are not properly checked for string termination which could lead to a read out of bounds in getname_kernel().

Add a helper that validates both source and target device name buffers. For devid as the source initialize the buffer to empty string in case something tries to read it later.

This was originally analyzed and fixed in a different way by Edward Adam Davis (see links).

Weakness: CWE-125

Which versions are affected by CVE-2024-26791?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-26791?

Apply the vendor's patch.

Is CVE-2024-26791 being exploited?

There is no known exploitation of CVE-2024-26791 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-2024-26791, DEBIAN-CVE-2024-26791, GHSA-7vqv-4gqw-665q, UBUNTU-CVE-2024-26791.