CVE-2024-40966

Name	CVE-2024-40966
Description	In the Linux kernel, the following vulnerability has been resolved: tty: add the option to have a tty reject a new ldisc ... and use it to limit the virtual terminals to just N_TTY. They are kind of special, and in particular, the "con_write()" routine violates the "writes cannot sleep" rule that some ldiscs rely on. This avoids the BUG: sleeping function called from invalid context at kernel/printk/printk.c:2659 when N_GSM has been attached to a virtual console, and gsmld_write() calls con_write() while holding a spinlock, and con_write() then tries to get the console lock.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-4008-1, DSA-5731-1

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)	5.10.226-1	vulnerable
	bookworm	6.1.123-1	fixed
	bookworm (security)	6.1.119-1	fixed
	trixie	6.12.10-1	fixed
	sid	6.12.11-1	fixed
linux-6.1 (PTS)	bullseye (security)	6.1.119-1~deb11u1	fixed

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

Package	Type	Release	Fixed Version	Origin
linux	source	bookworm	6.1.99-1	DSA-5731-1
linux	source	(unstable)	6.9.7-1
linux-6.1	source	bullseye	6.1.119-1~deb11u1	DLA-4008-1

https://git.kernel.org/linus/6bd23e0c2bb6c65d4f5754d1456bc9a4427fc59b (6.10-rc1)