CVE-2024-27431: Debian Linux

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Debian Debian Linux: version 10.0 only
• Linux Linux Kernel: from 5.9, before 5.10.213 (fixed in 5.10.213); from 5.11, before 5.15.152 (fixed in 5.15.152); from 5.16, before 6.1.82 (fixed in 6.1.82); from 6.2, before 6.6.22 (fixed in 6.6.22); from 6.7, before 6.7.10 (fixed in 6.7.10); version 6.8 only

Published 2024-05-17. Last modified 2026-08-04.