CVE-2026-9064
High · 7.5CVSS
7.5
EPSS
0.8%
Published
May 20, 2026
CISA due date
—
The record
A flaw was found in 389-ds-base. The get_ldapmessage_controls_ext() function in the LDAP server does not enforce an upper bound on the number of controls per LDAP message. A remote, unauthenticated attacker can send a specially crafted LDAP request containing hundreds of thousands of minimal controls within the default maximum BER message size (2 MB), causing excessive CPU consumption and heap allocation on the server. Under concurrent exploitation, this leads to significant latency degradation, worker thread starvation, or out-of-memory termination, resulting in a denial of service.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| openSUSE:Leap 16.0 | 389-ds | 0 | 3.0.6~git337.647f49042-160000.1.1 |
| openSUSE:Tumbleweed | 389-ds | 0 | 3.1.4+e9d94d45a-1.1 |
Related vulnerabilities
- CVE-2025-14905 A flaw was found in the 389-ds-base server. Also affects 389-ds
- CVE-2024-43806 Rustix is a set of safe Rust bindings to POSIX-ish APIs. Also affects 389-ds
- CVE-2024-6237 A flaw was found in the 389 Directory Server. Also affects 389-ds
- CVE-2024-5953 A denial of service vulnerability was found in the 389-ds-base LDAP server. Also affects 389-ds
- CVE-2024-3657 A flaw was found in 389-ds-base. Also affects 389-ds
- CVE-2024-2199 A denial of service vulnerability was found in 389-ds-base ldap server. Also affects 389-ds
- CVE-2022-0996 A vulnerability was found in the 389 Directory Server that allows expired passwords to… Also affects 389-ds
- CVE-2026-114731 Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by an uncontrolled… CWE-770