CVE-2022-48805: net: usb: ax88179_178a: Fix out-of-bounds accesses in RX fixup

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-07-16 · updated 2026-06-17
Weakness: CWE-125

Description

In the Linux kernel, the following vulnerability has been resolved: net: usb: ax88179_178a: Fix out-of-bounds accesses in RX fixup ax88179_rx_fixup() contains several out-of-bounds accesses that can be triggered by a malicious (or defective) USB device, in particular: - The metadata array (hdr_off..hdr_off+2*pkt_cnt) 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. I have tested that this can be used by a malicious USB device to send a bogus ICMPv6 Echo Request and receive an ICMPv6 Echo Reply in response that contains random kernel heap data. It's probably also possible to get OOB writes from this on a little-endian system somehow - maybe by triggering skb_cow() via IP options processing -, but I haven't tested that.

Affected products

Linux kernel: from 3.9 before 4.9.303; from 4.10 before 4.14.268; from 4.15 before 4.19.231; from 4.20 before 5.4.180; from 5.5 before 5.10.101; from 5.11 before 5.15.24 — fixed in 4.14.268, 4.19.231, 4.9.303, 5.10.101, 5.15.24, 5.16.10

How to fix

Upgrade to a fixed version: Linux kernel 4.14.268, 4.19.231, 4.9.303, 5.10.101. Check the vendor advisory for mitigations.

References

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