CVE-2022-49051: net: usb: aqc111: Fix out-of-bounds accesses in RX fixup

Severity: medium (CVSS 6.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-02-26 · updated 2026-08-13
Weakness: CWE-125

Description

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.

Affected products

Linux kernel: from 5.0 before 5.4.190; from 5.5 before 5.10.112; from 5.11 before 5.15.35; from 5.16 before 5.17.4; 5.18-rc1 — fixed in 5.10.112, 5.15.35, 5.17.4, 5.4.190

How to fix

Upgrade to a fixed version: Linux kernel 5.10.112, 5.15.35, 5.17.4, 5.4.190. Check the vendor advisory for mitigations.

References

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