CVE-2024-27431

MEDIUM
Published May 17, 2024 Modified May 12, 2026 CWE-908

Description

In the Linux kernel, the following vulnerability has been resolved: cpumap: Zero-initialise xdp_rxq_info struct before running XDP program When running an XDP program that is attached to a cpumap entry, we don't initialise the xdp_rxq_info data structure being used in the xdp_buff that backs the XDP program invocation. Tobias noticed that this leads to random values being returned as the xdp_md->rx_queue_index value for XDP programs running in a cpumap. This means we're basically returning the contents of the uninitialised memory, which is bad. Fix this by zero-initialising the rxq data structure before running the XDP program.

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CVSS v3.1 Score

5.5
MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-908 CWE-908

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
linux linux_kernel
linux linux_kernel
debian debian_linux

References

Advisories & Patches

https://git.kernel.org/stable/c/2487007aa3b9fafbd2cb14068f49791ce1d7ede5 https://git.kernel.org/stable/c/3420b3ff1ff489c177ea1cb7bd9fbbc4e9a0be95 https://git.kernel.org/stable/c/5f4e51abfbe6eb444fa91906a5cd083044278297 https://git.kernel.org/stable/c/eaa7cb836659ced2d9f814ac32aa3ec193803ed6 https://git.kernel.org/stable/c/f0363af9619c77730764f10360e36c6445c12f7b https://git.kernel.org/stable/c/f562e4c4aab00986dde3093c4be919c3f2b85a4a https://git.kernel.org/stable/c/2487007aa3b9fafbd2cb14068f49791ce1d7ede5 https://git.kernel.org/stable/c/3420b3ff1ff489c177ea1cb7bd9fbbc4e9a0be95 https://git.kernel.org/stable/c/5f4e51abfbe6eb444fa91906a5cd083044278297 https://git.kernel.org/stable/c/eaa7cb836659ced2d9f814ac32aa3ec193803ed6 https://git.kernel.org/stable/c/f0363af9619c77730764f10360e36c6445c12f7b https://git.kernel.org/stable/c/f562e4c4aab00986dde3093c4be919c3f2b85a4a

Frequently Asked Questions

What is CVE-2024-27431? +
In the Linux kernel, the following vulnerability has been resolved: cpumap: Zero-initialise xdp_rxq_info struct before running XDP program When running an XDP program that is attached to a cpumap entry, we don't initialise the xdp_rxq_info data structure being used in the xdp_buff that backs the XDP program invocation. Tobias noticed that this leads to random values being returned as the xdp_md->rx_queue_index value for XDP programs running in a cpumap. This means we're basically returning the contents of the uninitialised memory, which is bad. Fix this by zero-initialising the rxq data structure before running the XDP program. It has a CVSS v3.1 base score of 5.5 (MEDIUM).
How severe is CVE-2024-27431? +
CVE-2024-27431 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.
What products are affected by CVE-2024-27431? +
CVE-2024-27431 affects products from debian, linux, specifically: debian_linux, linux_kernel. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2024-27431? +
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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