CVE-2026-64371

Name	CVE-2026-64371
Description	In the Linux kernel, the following vulnerability has been resolved: proc: protect ptrace_may_access() with exec_update_lock (part 1) Fix the easy cases where procfs currently calls ptrace_may_access() without exec_update_lock protection, where the fix is to simply add the extra lock or use mm_access(): - do_task_stat(): grab exec_update_lock - proc_pid_wchan(): grab exec_update_lock - proc_map_files_lookup(): use mm_access() instead of get_task_mm() - proc_map_files_readdir(): use mm_access() instead of get_task_mm() - proc_ns_get_link(): grab exec_update_lock - proc_ns_readlink(): grab exec_update_lock
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-4717-1, DLA-4720-1, DLA-4723-1, DLA-4724-1, DSA-6405-1

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)	5.10.262-1	fixed
	bookworm	6.1.176-1	vulnerable
	bookworm (security)	6.1.180-1	fixed
	trixie	6.12.94-1	vulnerable
	trixie (security)	6.12.101-1	fixed
	forky	7.1.7-1	fixed
	sid	7.1.8-1	fixed
linux-6.1 (PTS)	bullseye (security)	6.1.180-1~deb11u1	fixed
linux-6.12 (PTS)	bookworm (security)	6.12.100-1~deb12u1	fixed

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

Package	Type	Release	Fixed Version	Origin
linux	source	bullseye	5.10.262-1	DLA-4717-1
linux	source	bookworm	6.1.180-1	DLA-4720-1
linux	source	trixie	6.12.100-1	DSA-6405-1
linux	source	(unstable)	7.1.4-1
linux-6.1	source	bullseye	6.1.180-1~deb11u1	DLA-4723-1
linux-6.12	source	bookworm	6.12.100-1~deb12u1	DLA-4724-1

https://git.kernel.org/linus/6650527444dadc63d84aa939d14ecba4fadb2f69 (7.2-rc1)