VDB
CVE-2026-18663
CVE-2026-18663
PUBLISHED
CVSS 5.9 MEDIUM
Reported by redhat · Published August 12, 2026
A flaw was found in 389-ds-base. The get_ldapmessage_controls_ext() function frees the parsed controls array on the Session Tracking critical-control rejection path without clearing the SLAPI_REQCONTROLS pblock slot. Operation teardown then frees the same pointer again, causing a double-free. An unauthenticated remote attacker can trigger this with a single BIND request carrying a critical Session Tracking control, resulting in heap corruption and potential denial of service.
Risk Scores
CVSS 3.1
5.9
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Directory Server 11 | |
| Red Hat | Red Hat Directory Server 12 | |
| Red Hat | Red Hat Directory Server 13 | |
| Red Hat | Red Hat Enterprise Linux 10 | |
| Red Hat | Red Hat Enterprise Linux 6 | |
| Red Hat | Red Hat Enterprise Linux 7 | |
| Red Hat | Red Hat Enterprise Linux 8 | |
| Red Hat | Red Hat Enterprise Linux 9 | |
| Red Hat | Red Hat Enterprise Linux 10 | |
| Red Hat | Red Hat Directory Server 13 | |
| Red Hat | Red Hat Enterprise Linux 9 | |
| Red Hat | Red Hat Enterprise Linux 8 | |
| Red Hat | Red Hat Directory Server 12 | |
| Red Hat | Red Hat Enterprise Linux 6 | |
| Red Hat | Red Hat Enterprise Linux 7 | |
| Red Hat | Red Hat Directory Server 11 |
Timeline
- Aug 12, 2026 EPSS Score
- Aug 12, 2026 Coalition ESS Score
- Aug 12, 2026 CVE Published
- Aug 14, 2026 Security Advisory
- Aug 14, 2026 CVE Updated
- Aug 24, 2026 EPSS Score
- Aug 26, 2026 EPSS Score
- Aug 30, 2026 EPSS Score
- Sep 3, 2026 EPSS Score
- Sep 6, 2026 EPSS Score
- Sep 9, 2026 EPSS Score
- Sep 12, 2026 EPSS Score
References
- vdb-entryx_refsource_REDHAT
- RHBZ#2510631 issue-trackingx_refsource_REDHAT