CVE-2026-63824

Name	CVE-2026-63824
Description	In the Linux kernel, the following vulnerability has been resolved: KEYS: fix overflow in keyctl_pkey_params_get_2() The length for the internal output buffer is calculated incorrectly, which can result overflow when a too small buffer is provided. Fix the bug by allocating internal output with the size of the maximum length of the cryptographic primitive instead of caller provided size.
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)

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	vulnerable
	bookworm	6.1.176-1	vulnerable
	bookworm (security)	6.1.177-1	fixed
	trixie	6.12.94-1	vulnerable
	trixie (security)	6.12.95-1	fixed
	forky	7.1.3-1	fixed
	sid	7.1.4-1	fixed

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

Package	Type	Release	Fixed Version
linux	source	bookworm	6.1.177-1
linux	source	trixie	6.12.95-1
linux	source	(unstable)	7.1.3-1

https://git.kernel.org/linus/cb481e59ea6cae3b7796ac1d7a22b6b24c3f3c0b (7.2-rc1)