CVE-2026-11793— 389-ds-base: 389-ds-base: stack buffer overflow in checkprefix() algorithm id parsing
Possible ATT&CK Techniques 1AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 8
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Red Hat | Red Hat Directory Server 11 | any | unknown |
| Red Hat | Red Hat Directory Server 12 | any | unknown |
| Red Hat | Red Hat Directory Server 13 | any | unknown |
| Red Hat | Red Hat Enterprise Linux 10 | any | unknown |
| Red Hat | Red Hat Enterprise Linux 6 | any | unknown |
| Red Hat | Red Hat Enterprise Linux 7 | any | unknown |
| Red Hat | Red Hat Enterprise Linux 8 | any | unknown |
| Red Hat | Red Hat Enterprise Linux 9 | any | unknown |
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I. Basic Information for CVE-2026-11793
Vulnerability Information
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Vulnerability Title
389-ds-base: 389-ds-base: stack buffer overflow in checkprefix() algorithm id parsing
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
栈缓冲区溢出
Source: NVD (National Vulnerability Database)
Vulnerability Title
389 Directory Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
389 Directory Server是389 Directory Server开源的一个高度可用、功能齐全、可靠和安全的LDAP服务器实现。 389 Directory Server存在安全漏洞，该漏洞源于pw.c中的checkPrefix函数在解析可逆加密属性值时，将攻击者控制的算法ID复制到256字节栈缓冲区而未进行边界检查，导致具有目录管理器权限的攻击者通过存储带有超大算法ID的特制凭据崩溃LDAP服务器。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Red Hat | Red Hat Directory Server 11 | - | cpe:/a:redhat:directory_server:11 | |
| Red Hat | Red Hat Directory Server 12 | - | cpe:/a:redhat:directory_server:12 | |
| Red Hat | Red Hat Directory Server 13 | - | cpe:/a:redhat:directory_server:13 | |
| Red Hat | Red Hat Enterprise Linux 10 | - | cpe:/o:redhat:enterprise_linux:10 | |
| Red Hat | Red Hat Enterprise Linux 6 | - | cpe:/o:redhat:enterprise_linux:6 | |
| Red Hat | Red Hat Enterprise Linux 7 | - | cpe:/o:redhat:enterprise_linux:7 | |
| Red Hat | Red Hat Enterprise Linux 8 | - | cpe:/o:redhat:enterprise_linux:8 | |
| Red Hat | Red Hat Enterprise Linux 9 | - | cpe:/o:redhat:enterprise_linux:9 |
II. Public POCs for CVE-2026-11793
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-11793 (3)
Same Patch Batch · Red Hat · 2026-06-09 · 9 CVEs total
| CVE-2026-11788 | 5.9 MEDIUM | 389-ds-base: 389-ds-base: null pointer dereference in deref control plugin ber parser |
| CVE-2026-11787 | 5.0 MEDIUM | 389-ds-base: 389-ds-base: heap buffer over-read in ldap_utf8prev() via str2simple filter p |
| CVE-2026-11790 | 4.9 MEDIUM | 389-ds-base: 389-ds-base: pbkdf2 password storage plugin unbounded iteration count denial |
| CVE-2026-11789 | 4.9 MEDIUM | 389-ds-base: 389-ds-base: smd5 password storage plugin salt length integer underflow crash |
| CVE-2026-52902 | 4.7 MEDIUM | Awxkit: path traversal via yaml !include directive |
| CVE-2026-11785 | 4.3 MEDIUM | 389-ds-base: 389-ds-base: partial stack address information leak via ber_printf type confu |
| CVE-2026-11792 | 3.3 LOW | 389-ds-base: 389-ds-base: heap buffer overflow in audit log password masking (create_maske |
| CVE-2026-11786 | 1.9 LOW | 389-ds-base: 389-ds-base: heap out-of-bounds read in ldif parser str2entry_state_informati |
IV. Related Vulnerabilities
Same product: Red Hat Directory Server 11
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389-ds-base: 389-ds-base: use-after-free in schema reload vi - CVE-2026-12528
389-ds-base: 389-ds-base: heap-buffer-overflows in __aclp__n - CVE-2026-11774
389-ds-base: 389-ds-base: integer overflow in sasl packet le - CVE-2026-11884
389-ds-base: 389-ds-base: heap buffer overflow in schema obj - CVE-2026-11792
389-ds-base: 389-ds-base: heap buffer overflow in audit log
Same vendor: Red Hat
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