Medium · published February 26, 2025
In the Linux kernel, the following vulnerability has been resolved:
net: usb: aqc111: Fix out-of-bounds accesses in RX fixup
aqc111_rx_fixup() contains several out-of-bounds accesses that can be
triggered by a malicious (or defective) USB device, in particular:
- The metadata array (desc_offset..desc_offset+2*pkt_count) can be out of bounds,
causing OOB reads and (on big-endian systems) OOB endianness flips.
- A packet can overlap the metadata array, causing a later OOB
endianness flip to corrupt data used by a cloned SKB that has already
been handed off into the network stack.
- A packet SKB can be constructed whose tail is far beyond its end,
causing out-of-bounds heap data to be considered part of the SKB's
data.
Found doing variant analysis. Tested it with another driver (ax88179_178a), since
I don't have a aqc111 device to test it, but the code looks very similar.
| Product | Versions | Fixed in |
|---|---|---|
| linux/linux_kernel | ≥ 5.0, < 5.4.190 | 5.4.190 |
| linux/linux_kernel | ≥ 5.5, < 5.10.112 | 5.10.112 |
| linux/linux_kernel | ≥ 5.11, < 5.15.35 | 5.15.35 |
| linux/linux_kernel | ≥ 5.16, < 5.17.4 | 5.17.4 |
| linux/linux_kernel | all versions | — |