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CVE-2024-26616

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: btrfs: scrub: avoid use-after-free when chunk length is not 64K aligned [BUG] There is a bug report that, on a ext4-converted b…

Published Mar 11, 2024CWE-416EPSS 0.29%

Overview

CVE-2024-26616 is a high-severity vulnerability. It was published on March 11, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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

btrfs: scrub: avoid use-after-free when chunk length is not 64K aligned

[BUG]

There is a bug report that, on a ext4-converted btrfs, scrub leads to

various problems, including:

- "unable to find chunk map" errors

BTRFS info (device vdb): scrub: started on devid 1

BTRFS critical (device vdb): unable to find chunk map for logical 2214744064 length 4096

BTRFS critical (device vdb): unable to find chunk map for logical 2214744064 length 45056

This would lead to unrepariable errors.

- Use-after-free KASAN reports:

==================================================================

BUG: KASAN: slab-use-after-free in __blk_rq_map_sg+0x18f/0x7c0

Read of size 8 at addr ffff8881013c9040 by task btrfs/909

CPU: 0 PID: 909 Comm: btrfs Not tainted 6.7.0-x64v3-dbg #11 c50636e9419a8354555555245df535e380563b2b

Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 2023.11-2 12/24/2023

Call Trace:

<TASK>

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/34de0f04684ec00c093a0455648be055f0e8e24fRefgit.kernel.org/stable/c/642b9c520ef2f104277ad1f902f8526edbe087fbRefgit.kernel.org/stable/c/f546c4282673497a06ecb6190b50ae7f6c85b02fRefgit.kernel.org/stable/c/34de0f04684ec00c093a0455648be055f0e8e24fRefgit.kernel.org/stable/c/642b9c520ef2f104277ad1f902f8526edbe087fbRefgit.kernel.org/stable/c/f546c4282673497a06ecb6190b50ae7f6c85b02f

How CyberStrike helps

Frequently asked questions

What is CVE-2024-26616?

CVE-2024-26616 is a high-severity vulnerability. It was published on March 11, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2024-26616?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2024-26616?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2024-26616?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-26616 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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