CVE-2022-49051

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux17364b805f5b9016bb528241ba91481e3497e5e1 < 404998a137bcb8a926f7c949030afbe285472593affected
LinuxLinux17364b805f5b9016bb528241ba91481e3497e5e1 < d90df6da50c56ad8b1a132e3cf86b6cdf8f507b7affected
LinuxLinux17364b805f5b9016bb528241ba91481e3497e5e1 < b416898442f2b6aa9f1b2f2968ce07e3abaa05f7affected
LinuxLinux17364b805f5b9016bb528241ba91481e3497e5e1 < 36311fe98f55dea9200c69e2dd6d6ddb8fc94080affected
LinuxLinux17364b805f5b9016bb528241ba91481e3497e5e1 < afb8e246527536848b9b4025b40e613edf776a9daffected
LinuxLinux5.0affected
LinuxLinux0 < 5.0unaffected
LinuxLinux5.4.190 <= 5.4.*unaffected
LinuxLinux5.10.112 <= 5.10.*unaffected
LinuxLinux5.15.35 <= 5.15.*unaffected
LinuxLinux5.17.4 <= 5.17.*unaffected
LinuxLinux5.18 <= *unaffected

Weaknesses

References