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CVE-2026-16560— 389-ds-base: 389-ds-base: heap-buffer-overflow in rdn_av_swap on quoted multivalued rdn

CVSS 5.3 · Medium EPSS 0.40% · P32

Possible ATT&CK Techniques 1AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-16560

Vulnerability Information
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Vulnerability Title
389-ds-base: 389-ds-base: heap-buffer-overflow in rdn_av_swap on quoted multivalued rdn
Source: CVE Program / CVE List V5
Vulnerability Description
A heap-buffer-overflow flaw was found in Directory Server (389-ds-base). When a DN contains a legacy-quoted value, the server won't close the heap allocation allowing another call to refer to the same memory pointer causing a denial of service or an arbitrary memory write operation.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1220
Source: CVE Program / CVE List V5

Affected Products

VendorProductAffected VersionsCPESubscribe
Red HatRed Hat Directory Server 11-cpe:/a:redhat:directory_server:11
Red HatRed Hat Directory Server 12-cpe:/a:redhat:directory_server:12
Red HatRed Hat Directory Server 13-cpe:/a:redhat:directory_server:13
Red HatRed Hat Enterprise Linux 10-cpe:/o:redhat:enterprise_linux:10
Red HatRed Hat Enterprise Linux 6-cpe:/o:redhat:enterprise_linux:6
Red HatRed Hat Enterprise Linux 7-cpe:/o:redhat:enterprise_linux:7
Red HatRed Hat Enterprise Linux 8-cpe:/o:redhat:enterprise_linux:8
Red HatRed Hat Enterprise Linux 9-cpe:/o:redhat:enterprise_linux:9

II. Public POCs for CVE-2026-16560

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III. Intelligence Information for CVE-2026-16560

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Vendor Advisories for CVE-2026-16560 (2)

Same Patch Batch · Red Hat · 2026-07-22 · 8 CVEs total

CVE-2026-441897.8 HIGHAnsible-lightspeed: visual studio code ansible lightspeed extension: arbitrary code execut
CVE-2026-441907.8 HIGHAnsible-lightspeed: ansible lightspeed visual studio code extension: arbitrary code execut
CVE-2026-441917.8 HIGHAnsible-lightspeed: visual studio code ansible lightspeed extension: remote code execution
CVE-2026-441926.6 MEDIUMAnsible-lightspeed: ansible lightspeed mcp server: remote code execution and data exfiltra
CVE-2026-165446.5 MEDIUMAwx: websocket eventconsumer missing authorization for inventory_update_events, project_up
CVE-2026-164734.3 MEDIUMSbc: sbc: heap out-of-bounds read via crafted sbc audio frame
CVE-2026-441873.3 LOWAnsible-lightspeed: ansible lightspeed extension for visual studio code: information discl

IV. Related Vulnerabilities

Same product: Red Hat Directory Server 11
Same vendor: Red Hat
Same weakness: CWE-1220

V. Comments for CVE-2026-16560

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