High · published May 17, 2024
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.
| Product | Versions | Fixed in |
|---|---|---|
| linux/linux_kernel | ≥ 5.9, < 5.10.213 | 5.10.213 |
| linux/linux_kernel | ≥ 5.11, < 5.15.152 | 5.15.152 |
| linux/linux_kernel | ≥ 5.16, < 6.1.82 | 6.1.82 |
| linux/linux_kernel | ≥ 6.2, < 6.6.22 | 6.6.22 |
| linux/linux_kernel | ≥ 6.7, < 6.7.10 | 6.7.10 |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| debian/debian_linux | all versions | — |