CVE-2026-15722

Name	CVE-2026-15722
Description	A stack buffer overflow flaw was found in 389 Directory Server (389-ds-base). The get_ruvelement_from_berval() function in repl5_ruv.c copies digit characters from a network-supplied RUV berval into a fixed 16-byte stack buffer without bounds checking. A remote unauthenticated attacker can crash the LDAP server by sending a crafted StartNSDS50ReplicationRequest extended operation containing a replica ID field with more than 16 digit characters. The overflow occurs during payload decoding, before any authorization check. Stack protectors limit impact to 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=2499961