CVE-2024-26772 ext4: avoid allocating blocks from corrupted group in ext4_mb_find_by_goal()

What is CVE-2024-26772?

CVE-2024-26772 is a high-severity denial of service vulnerability in Debian Debian Linux, published on 3 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:

ext4: avoid allocating blocks from corrupted group in ext4_mb_find_by_goal()

Places the logic for checking if the group's block bitmap is corrupt under the protection of the group lock to avoid allocating blocks from the group with a corrupted block bitmap.

Which versions are affected by CVE-2024-26772?

It affects 2 products.

Products include Debian Debian Linux, Linux kernel.

How do I fix CVE-2024-26772?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2024-26772 being exploited?

There is no known exploitation of CVE-2024-26772 in the wild and no public exploit code.

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All Debian Debian Linux vulnerabilities

Sources

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

Also known as BELL-CVE-2024-26772, DEBIAN-CVE-2024-26772, GHSA-qcgh-63vj-9xp8, UBUNTU-CVE-2024-26772.