Vulnerability · Published Jul 8, 2026 · Assigned by redhat
CVE-2026-15041389-ds-base: 389-ds-base: non-constant-time comparison in pbkdf2-sha256 password verification
Low 3.7
In plain English
A low-severity security flaw in Red Hat Directory Server 11 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities).
Official description
A flaw was found in 389 Directory Server. The PBKDF2-SHA256 password verification function uses standard memcmp() for comparing password hashes instead of a constant-time comparison function. A remote attacker could potentially use timing measurements of LDAP bind attempts to infer partial hash information, though practical exploitation is extremely difficult due to PBKDF2 computational overhead.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | 389-ds-base | no fix listed | DEBIAN-CVE-2026-15041 |
| Debian:13 | 389-ds-base | no fix listed | DEBIAN-CVE-2026-15041 |
| Ubuntu:22.04:LTS | 389-ds-base | no fix listed | UBUNTU-CVE-2026-15041 |
| Ubuntu:24.04:LTS | 389-ds-base | no fix listed | UBUNTU-CVE-2026-15041 |
| Ubuntu:25.10 | 389-ds-base | no fix listed | UBUNTU-CVE-2026-15041 |
| Ubuntu:26.04:LTS | 389-ds-base | no fix listed | UBUNTU-CVE-2026-15041 |
| Ubuntu:26.10 | 389-ds-base | no fix listed | UBUNTU-CVE-2026-15041 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Directory Server 11 | see references |
| Red Hat | Red Hat Directory Server 12 | see references |
| Red Hat | Red Hat Directory Server 13 | see references |
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 6 | see references |
| Red Hat | Red Hat Enterprise Linux 7 | see references |
| Red Hat | Red Hat Enterprise Linux 8 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
Weakness: CWE-208 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
References
- https://access.redhat.com/security/cve/CVE-2026-15041 vdb-entry, x_refsource_REDHAT
- RHBZ#2498022 issue-tracking, x_refsource_REDHAT