CVE-2026-46184

Summary

In the Linux kernel, the following vulnerability has been resolved:

sound: ua101: fix division by zero at probe

Add a missing sanity check for bNrChannels in detect_usb_format() to prevent a division by zero in playback_urb_complete() and capture_urb_complete().

USB core does not validate class-specific descriptor fields such as bNrChannels, so drivers must verify them before use. If a device provides bNrChannels = 0, frame_bytes becomes zero and is later used as a divisor in the URB completion handlers, leading to a kernel crash.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux63978ab3e3e963db28093b53bb4598f2702e1ad7 < e02897c5b041c9b980055fa9a6167023d6dc5cafaffected
LinuxLinux63978ab3e3e963db28093b53bb4598f2702e1ad7 < aae1498c59f48d03ee358df84f07a5af9885f827affected
LinuxLinux63978ab3e3e963db28093b53bb4598f2702e1ad7 < 66d9c2ed081f299cfb201d9e9c4faf920e56e0bfaffected
LinuxLinux63978ab3e3e963db28093b53bb4598f2702e1ad7 < 6162e8212e88c39492d981b248b5e37002486c66affected
LinuxLinux63978ab3e3e963db28093b53bb4598f2702e1ad7 < 593dd7e6c890d8e4ca21b3e2f796b7cb8e8da983affected
LinuxLinux63978ab3e3e963db28093b53bb4598f2702e1ad7 < 0ff2b713f406e9ecadb406014d74e7a020ac12b1affected
LinuxLinux63978ab3e3e963db28093b53bb4598f2702e1ad7 < f1862dbf09080254c52175a448290c784dd7d3deaffected
LinuxLinux63978ab3e3e963db28093b53bb4598f2702e1ad7 < d1f73f169c1014463b5060e3f60813e13ddc7b87affected
LinuxLinux2.6.34affected
LinuxLinux0 < 2.6.34unaffected
LinuxLinux5.10.258 <= 5.10.*unaffected
LinuxLinux5.15.209 <= 5.15.*unaffected
LinuxLinux6.1.175 <= 6.1.*unaffected
LinuxLinux6.6.140 <= 6.6.*unaffected
LinuxLinux6.12.88 <= 6.12.*unaffected
LinuxLinux6.18.30 <= 6.18.*unaffected
LinuxLinux7.0.7 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References