CVE-2026-16560: medium-severity vulnerability in Red Hat Directory Server 11
389-ds-base: 389-ds-base: heap-buffer-overflow in rdn_av_swap on quoted multivalued rdn
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.3epss 0.4%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Affected products
Red Hat · 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 9Related CVEs — Red Hat Directory Server 11
In the same product, most dangerous first.
CVE-2025-14905HIGH389-ds-base: 389-ds-base: remote code execution and denial of service via heap buffer overflowEPSS 1.3%CVE-2024-6237MEDIUM389-ds-base: unauthenticated user can trigger a dos by sending a specific extended search requestEPSS 0.9%CVE-2026-18453HIGH389-ds-base: 389-ds-base: pre-authentication null pointer dereference via paged results and use_one_backend control in op_shared_searchEPSS 0.8%CVE-2026-18355HIGH389-ds-base: 389-ds-base: heap buffer overflow via sasl wrapped-record length lower-bound underflow in sasl_io_start_packet()EPSS 0.8%CVE-2026-15722HIGH389-ds-base: 389-ds-base: pre-authentication stack buffer overflow in get_ruvelement_from_berval() via unbounded replica id parsingEPSS 0.8%CVE-2026-9064HIGH389-ds-base: 389-ds-base: unbounded ldap controls count in get_ldapmessage_controls_ext() causes cpu and heap amplification (remote dos)EPSS 0.8%