CVE-2026-15722 — HIGH (7.5)

Vulnerability 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.

CVSS Score

7.5

HIGH

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Redhat	Directory Server	11.0
Redhat	389 Directory Server	-
Redhat	Enterprise Linux	7.0

Related Weaknesses (CWE)

CWE-121

References

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

FAQ

What is CVE-2026-15722?

CVE-2026-15722 is a vulnerability with a CVSS score of 7.5 (HIGH). 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...

How severe is CVE-2026-15722?

CVE-2026-15722 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-15722?

Check the references section above for vendor advisories and patch information. Affected products include: Redhat Directory Server, Redhat 389 Directory Server, Redhat Enterprise Linux.