CVE-2026-15041 Details
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.
A timing vulnerability has been identified in 389 Directory Server's PBKDF2-SHA256 password verification function. This function compares password hashes using the standard memcmp() method, which can introduce timing discrepancies. A remote attacker might exploit these timing variations during LDAP bind operations to infer partial hash information. However, practical exploitation is challenging due to the computational overhead of PBKDF2, which applies over 8192 iterations, masking any timing differences at the nanosecond level.
Users are advised to configure 389 Directory Server to use a different password storage scheme, such as SSHA512 or GOST-Yescrypt, which employs constant-time comparison. Red Hat Directory Server versions 11, 12, 13, and Red Hat Enterprise Linux 7, 8, and 9 are affected by this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jul 8, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2026-15041 | [email protected] | Vendor Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=2498022 | [email protected] | Issue TrackingVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-208 | Observable Timing Discrepancy | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| redhat directory server | 11.0 12.0 13.0 |
CPE
Remediation
| |
| redhat 389 directory server | All versions |
CPE
Remediation
| |
| redhat enterprise linux | 7.0 8.0 9.0 10.0 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 9, 2026 | Initial Analysis | [email protected] |
| Jul 8, 2026 | CVE Modified | CISA-ADP |
| Jul 8, 2026 | CVE Modified | [email protected] |
| Jul 8, 2026 | New CVE Received | [email protected] |