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.
| Software | From | Fixed in |
|---|---|---|
| linux / linux_kernel | 5.9 | 5.10.213 |
| linux / linux_kernel | 5.11 | 5.15.152 |
| linux / linux_kernel | 5.16 | 6.1.82 |
| linux / linux_kernel | 6.2 | 6.6.22 |
| linux / linux_kernel | 6.7 | 6.7.10 |
| linux / linux_kernel | 6.8-rc1 | 6.8-rc1.x |
| linux / linux_kernel | 6.8-rc2 | 6.8-rc2.x |
| linux / linux_kernel | 6.8-rc3 | 6.8-rc3.x |
| linux / linux_kernel | 6.8-rc4 | 6.8-rc4.x |
| linux / linux_kernel | 6.8-rc5 | 6.8-rc5.x |
| linux / linux_kernel | 6.8-rc6 | 6.8-rc6.x |
| linux / linux_kernel | 6.8-rc7 | 6.8-rc7.x |
| debian / debian_linux | 10.0 | 10.0.x |
- 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://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
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