CVE-2026-23019

Name	CVE-2026-23019
Description	In the Linux kernel, the following vulnerability has been resolved: net: marvell: prestera: fix NULL dereference on devlink_alloc() failure devlink_alloc() may return NULL on allocation failure, but prestera_devlink_alloc() unconditionally calls devlink_priv() on the returned pointer. This leads to a NULL pointer dereference if devlink allocation fails. Add a check for a NULL devlink pointer and return NULL early to avoid the 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-4476-1, DSA-6126-1, DSA-6127-1

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)	5.10.251-1	vulnerable
	bookworm	6.1.159-1	vulnerable
	bookworm (security)	6.1.164-1	fixed
	trixie	6.12.63-1	vulnerable
	trixie (security)	6.12.74-2	fixed
	forky	6.19.6-1	fixed
	sid	6.19.6-2	fixed
linux-6.1 (PTS)	bullseye (security)	6.1.164-1~deb11u1	fixed

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

Package	Type	Release	Fixed Version	Origin
linux	source	bookworm	6.1.162-1	DSA-6127-1
linux	source	trixie	6.12.69-1	DSA-6126-1
linux	source	(unstable)	6.18.8-1
linux-6.1	source	bullseye	6.1.162-1~deb11u1	DLA-4476-1

https://git.kernel.org/linus/a428e0da1248c353557970848994f35fd3f005e2 (6.19-rc5)