7.8 High

CVE-2024-27431 In the Linux kernel, the following vulnerability has been resolved: cpumap: Zero-initialise xdp_rxq_info struct before…

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.

Affected products and versions

Product	Affected versions	Fixed in
Linux 6.8	earliest → < 6.8	6.8
Linux 6.7	earliest → < 6.7.10	6.7.10
Linux 6.6	earliest → < 6.6.22	6.6.22
Linux 6.1	earliest → < 6.1.82	6.1.82
Linux 5.15	earliest → < 5.15.152	5.15.152
Linux 5.10	earliest → < 5.10.213	5.10.213
Linux	5.9	No fix stated
linux_kernel 6.8	earliest → < 6.8	6.8
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem 1.1	earliest → < 1.1.1	1.1.1