CVE-2026-18663
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.
Scoring
- Severity
- MEDIUM
- CVSS base score
- 5.9
- CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS probability
- 0.43%
- CWE
- CWE-415
- Published
- 2026-08-12
- Last modified
- 2026-08-13
Weakness type
Related vulnerabilities
- CVE-2026-87585 — Double free in PDFium in Google Chrome on on Windows prior to 153.0.8010.36 allowed a remote...
- CVE-2026-61915 — An issue was discovered in Cyrus IMAP before 3.12.4. There is a VPATCH BYPARAM double-free. An...
- CVE-2026-79907 — Acrobat Reader | Double Free (CWE-415)
- CVE-2026-81950 — Microsoft Excel Remote Code Execution Vulnerability
- CVE-2026-80080 — Microsoft Office Word Remote Code Execution Vulnerability
- CVE-2026-69309 — Windows Print Spooler Components Elevation of Privilege Vulnerability
- CVE-2026-70567 — Windows Display Enhancement Service Elevation of Privilege Vulnerability
- CVE-2026-69725 — Windows Hello Elevation of Privilege Vulnerability