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CVE-2024-27397

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: use timestamp to check for set element timeout Add a timestamp field at the beginning of the transaction,…

Published May 14, 2024CWE-416EPSS 0.26%

Overview

CVE-2024-27397 is a high-severity vulnerability. It was published on May 14, 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:

netfilter: nf_tables: use timestamp to check for set element timeout

Add a timestamp field at the beginning of the transaction, store it

in the nftables per-netns area.

Update set backend .insert, .deactivate and sync gc path to use the

timestamp, this avoids that an element expires while control plane

transaction is still unfinished.

.lookup and .update, which are used from packet path, still use the

current time to check if the element has expired. And .get path and dump

also since this runs lockless under rcu read size lock. Then, there is

async gc which also needs to check the current time since it runs

asynchronously from a workqueue.

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/0d40e8cb1d1f56a994cdd2e015af622fdca9ed4dRefgit.kernel.org/stable/c/383182db8d58c4237772ba0764cded4938a235c3Refgit.kernel.org/stable/c/7395dfacfff65e9938ac0889dafa1ab01e987d15Refgit.kernel.org/stable/c/7b17de2a71e56c10335b565cc7ad238e6d984379Refgit.kernel.org/stable/c/7fa2e2960fff8322ce2ded57b5f8e9cbc450b967Refgit.kernel.org/stable/c/b45176b869673417ace338b87cf9cdb66e2eeb01Refgit.kernel.org/stable/c/eaf1a29ea5d7dba8e84e9e9f3b3f47d0cd540bfeRefgit.kernel.org/stable/c/f8dfda798650241c1692058713ca4fef8e429061Refgit.kernel.org/stable/c/383182db8d58c4237772ba0764cded4938a235c3Refgit.kernel.org/stable/c/7395dfacfff65e9938ac0889dafa1ab01e987d15

How CyberStrike helps

Frequently asked questions

What is CVE-2024-27397?

CVE-2024-27397 is a high-severity vulnerability. It was published on May 14, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2024-27397?

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-2024-27397?

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-2024-27397?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-27397 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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