CVE-2022-49051
MediumCVSS 6.8Exploitation Probability (EPSS)
Low risk36th percentile - higher than 36% of all known CVEs
Summary
In the Linux kernel, the aqc111 USB driver has out-of-bounds access vulnerabilities in the aqc111_rx_fixup() function. A malicious or defective USB device can trigger out-of-bounds reads of the metadata array, corruption of data in cloned SKBs, and construction of a packet with a tail beyond the buffer end. The fix is not described in this description.
Risk Assessment
The vulnerability could be exploited by a connected USB device to cause system crashes or potential kernel code execution. An attacker with physical access to a USB port could exploit this.
Recommendation
It is recommended to update the Linux kernel to a patched version. Also avoid connecting untrusted USB devices.
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Original NVD description (English source)
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.