CVE-2026-11793
389-ds-base: 389-ds-base: stack buffer overflow in checkprefix() algorithm id parsing
- State
- Published
- Severity
- 4.9 Medium
- Published
- Jun 9, 2026
- Updated
- Aug 7, 2026
- Reserved
- Jun 9, 2026
Description
A stack buffer overflow flaw was found in 389 Directory Server. The checkPrefix() function in pw.c copies an attacker-controlled algorithm ID into a 256-byte stack buffer without bounds checking when parsing reversible-encrypted attribute values. An attacker with Directory Manager privileges can crash the LDAP server by storing a crafted credential with an oversized algorithm ID. FORTIFY_SOURCE mitigates this to denial of service only.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 4.9 Medium | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H | redhat |
Weaknesses
- CWE-121 Stack-based Buffer Overflow
Affected Products
| Product | Versions |
|---|---|
Red Hat Directory Server 11Red Hat | |
Red Hat Directory Server 12Red Hat | |
Red Hat Directory Server 13Red Hat | |
Red Hat Enterprise Linux 10Red Hat | |
Red Hat Enterprise Linux 6Red Hat | |
Red Hat Enterprise Linux 7Red Hat | |
Red Hat Enterprise Linux 8Red Hat | |
Red Hat Enterprise Linux 9Red Hat |
References
- https://access.redhat.com/security/cve/CVE-2026-11793vdb-entry
- RHBZ#2484914issue-tracking
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