CVE-2026-46184

Name	CVE-2026-46184
Description	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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-4664-1, DLA-4665-1, DLA-4671-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
linux (PTS)	bullseye	5.10.223-1	vulnerable
	bullseye (security)	5.10.259-1	fixed
	bookworm	6.1.170-3	vulnerable
	bookworm (security)	6.1.176-1	fixed
	trixie	6.12.86-1	vulnerable
	trixie (security)	6.12.95-1	fixed
	forky	7.0.13-1	fixed
	sid	7.1.3-1	fixed
linux-6.1 (PTS)	bullseye (security)	6.1.176-1~deb11u1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin
linux	source	bullseye	5.10.259-1	DLA-4664-1
linux	source	bookworm	6.1.176-1	DLA-4665-1
linux	source	trixie	6.12.88-1
linux	source	(unstable)	7.0.7-1
linux-6.1	source	bullseye	6.1.176-1~deb11u1	DLA-4671-1

https://git.kernel.org/linus/d1f73f169c1014463b5060e3f60813e13ddc7b87 (7.1-rc2)