CVE-2026-11793

Name	CVE-2026-11793
Description	A stack buffer overflow flaw was found in 389 Directory Server. The checkPrefix() function in pw.c copies an attacker-controlled algorithm ID into a 256-byte stack buffer without bounds checking when parsing reversible-encrypted attribute values. An attacker with Directory Manager privileges can crash the LDAP server by storing a crafted credential with an oversized algorithm ID. FORTIFY_SOURCE mitigates this to denial of service only.
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=2484914
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