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CVE-2024-53206

9.8 · CRITICAL

In the Linux kernel, the following vulnerability has been resolved: tcp: Fix use-after-free of nreq in reqsk_timer_handler().

Published Dec 27, 2024CWE-416EPSS 0.63%

Overview

CVE-2024-53206 is a critical-severity vulnerability. It was published on December 27, 2024 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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

tcp: Fix use-after-free of nreq in reqsk_timer_handler().

The cited commit replaced inet_csk_reqsk_queue_drop_and_put() with

__inet_csk_reqsk_queue_drop() and reqsk_put() in reqsk_timer_handler().

Then, oreq should be passed to reqsk_put() instead of req; otherwise

use-after-free of nreq could happen when reqsk is migrated but the

retry attempt failed (e.g. due to timeout).

Let's pass oreq to reqsk_put().

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/2dcc86fefe09ac853158afd96b60d544af115dc5Refgit.kernel.org/stable/c/65ed89cad1f57034c256b016e89e8c0a4ec7c65bRefgit.kernel.org/stable/c/6d845028609a4af0ad66f499ee0bd5789122b067Refgit.kernel.org/stable/c/9a3c1ad93e6fba67b3a637cfa95a57a6685e4908Refgit.kernel.org/stable/c/c31e72d021db2714df03df6c42855a1db592716cRefgit.kernel.org/stable/c/d0eb14cb8c08b00c36a3d5dc57a6f428b301f721Reflists.debian.org/debian-lts-announce/2025/03/msg00001.html

How CyberStrike helps

Frequently asked questions

What is CVE-2024-53206?

CVE-2024-53206 is a critical-severity vulnerability. It was published on December 27, 2024 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2024-53206?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2024-53206?

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-2024-53206?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-53206 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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