CVE-2026-11793 | THREATINT

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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.

PUBLISHED Reserved 2026-06-09 | Published 2026-06-09 | Updated 2026-06-09 | Assigner redhat

MEDIUM: 4.9CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Problem types

Stack-based Buffer Overflow

Product status

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Timeline

2026-04-16:	Reported to Red Hat.
2026-04-16:	Made public.

References

access.redhat.com/security/cve/CVE-2026-11793 vdb-entry

bugzilla.redhat.com/show_bug.cgi?id=2484914 (RHBZ#2484914) issue-tracking

redhat.atlassian.net/browse/PSIRTSUPT-7600

cve.org (CVE-2026-11793)

nvd.nist.gov (CVE-2026-11793)

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