CVE-2026-97523

Name	CVE-2026-97523
Description	In the Linux kernel, the following vulnerability has been resolved: mptcp: close race between scheduler and state change The mptcp scheduler may race with subflow sockets state change: data transmission on the selected socket may fail and a later release could try to use mss_now reset to 0 for a divide operation. Address the issue by explicitly checking for the critical scenario.
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-4817-1, DSA-6528-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
linux (PTS)	bookworm	6.1.176-1	vulnerable
	bookworm (security)	6.1.187-1	vulnerable
	trixie	6.12.107-1	vulnerable
	trixie (security)	6.12.111-1	fixed
	forky	7.2.9-1	fixed
	sid	7.2.10-1	fixed
linux-6.12 (PTS)	bookworm (security)	6.12.111-1~deb12u1	fixed

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

Package	Type	Release	Fixed Version	Origin
linux	source	trixie	6.12.111-1	DSA-6528-1
linux	source	(unstable)	7.2.7-1
linux-6.12	source	bookworm	6.12.111-1~deb12u1	DLA-4817-1

https://git.kernel.org/linus/42064de57fb83231fcc89663a94885f228a1ee53 (7.3-rc4)