CVE-2026-14940

Name	CVE-2026-14940
Description	A heap-buffer-overflow flaw was found in 389 Directory Server (389-ds-base). When normalizing a Distinguished Name (DN) that contains a legacy-quoted value encoding a multivalued nested Relative Distinguished Name (RDN), the server can write past the end of a heap allocation while sorting RDN attribute-value pairs. An unauthenticated remote attacker can trigger this condition by sending an LDAP operation whose DN reaches the DN normalization routine, such as a search with a crafted base DN. This can corrupt heap memory and may cause denial of service.
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
389-ds-base (PTS)	bullseye	1.4.4.11-2	vulnerable
	bullseye (security)	1.4.4.11-2+deb11u1	vulnerable
	bookworm	2.3.1+dfsg1-1+deb12u1	vulnerable
	trixie	3.1.2+dfsg1-1+deb13u1	vulnerable
	sid	3.1.2+vendor1-2	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
389-ds-base	source	(unstable)	(unfixed)

https://bugzilla.redhat.com/show_bug.cgi?id=2497697