CVE-2024-41077 null_blk: fix validation of block size

What is CVE-2024-41077?

CVE-2024-41077 is a medium-severity vulnerability in Linux kernel, published on 29 Jul 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:

null_blk: fix validation of block size

Block size should be between 512 and PAGE_SIZE and be a power of 2. The current check does not validate this, so update the check.

Without this patch, null_blk would Oops due to a null pointer deref when loaded with bs=1536 [1].

[axboe: remove unnecessary braces and != 0 check]

Weakness: CWE-476

Which versions are affected by CVE-2024-41077?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-41077?

Apply the vendor's patch.

Is CVE-2024-41077 being exploited?

There is no known exploitation of CVE-2024-41077 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-2024-41077, DEBIAN-CVE-2024-41077, GHSA-fxx9-q7vv-g6p2, UBUNTU-CVE-2024-41077.