CVE-2024-27397

HIGH
Published May 14, 2024 Modified May 12, 2026 CWE-416

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.

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CVSS v3.1 Score

7.0
HIGH
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-416 Use After Free

Affected Products

Vendor Product
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel

References

Advisories & Patches

https://git.kernel.org/stable/c/0d40e8cb1d1f56a994cdd2e015af622fdca9ed4d https://git.kernel.org/stable/c/383182db8d58c4237772ba0764cded4938a235c3 https://git.kernel.org/stable/c/7395dfacfff65e9938ac0889dafa1ab01e987d15 https://git.kernel.org/stable/c/7b17de2a71e56c10335b565cc7ad238e6d984379 https://git.kernel.org/stable/c/7fa2e2960fff8322ce2ded57b5f8e9cbc450b967 https://git.kernel.org/stable/c/b45176b869673417ace338b87cf9cdb66e2eeb01 https://git.kernel.org/stable/c/eaf1a29ea5d7dba8e84e9e9f3b3f47d0cd540bfe https://git.kernel.org/stable/c/f8dfda798650241c1692058713ca4fef8e429061 https://git.kernel.org/stable/c/383182db8d58c4237772ba0764cded4938a235c3 https://git.kernel.org/stable/c/7395dfacfff65e9938ac0889dafa1ab01e987d15 https://git.kernel.org/stable/c/b45176b869673417ace338b87cf9cdb66e2eeb01

Frequently Asked Questions

What is CVE-2024-27397? +
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. It has a CVSS v3.1 base score of 7.0 (HIGH).
How severe is CVE-2024-27397? +
CVE-2024-27397 has a CVSS v3.1 score of 7.0 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.
What products are affected by CVE-2024-27397? +
CVE-2024-27397 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2024-27397? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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