Vulnerability Report

CVE-2026-15722

Title: Stack buffer overflow in 389 Directory Server

Memory Corruption

Proof Of Concept

No public PoC currently indexed for CVE-2026-15722.

CWE Category CWE-121

Published Date Jul 31, 2026

Modified Date Oct 08, 2026

Exploit Status Not Found

Score 7.5 CVSS v3.1

Exploit Probability (EPSS)

0.83%

Vulnerability Summary

CVE-2026-15722: 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.

Impacted Vendors

redhat 1

fedora 1

Reference Links

https://access.redhat.com/security/cve/CVE-2026-15722 https://bugzilla.redhat.com/show_bug.cgi?id=2499961

CVSS v3.1

Source Entity [email protected]

Severity HIGH

7.5

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

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

Associated Attack Patterns (CAPEC)

Total: Patterns