Medium severity4.9NVD Advisory· Published Jun 9, 2026· Updated Jun 15, 2026
CVE-2026-11793
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.
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Affected products
1Patches
Vulnerability mechanics
References
3- access.redhat.com/security/cve/CVE-2026-11793nvdVendor Advisory
- bugzilla.redhat.com/show_bug.cginvdIssue TrackingVendor Advisory
- redhat.atlassian.net/browse/PSIRTSUPT-7600nvdPermissions Required
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