Red Hat Security Advisory: 389-ds-base security update

Fixed packages 7

Vulnerabilities 3

• High 7.5
  CVE-2026-11770

  389-ds-base: 389-ds-base: pre-auth ldap filter injection in cleanallruv status check

  A flaw was found in 389 Directory Server. An unauthenticated remote attacker can inject LDAP search filters into the CleanAllRUV replication status-check extended operation. Because the handler performs the search against cn=config with elevated replication p…

  Red Hat Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 6 Linux Debian Ubuntu Azure Linux
  Jul 31, 2026
• High 7.5
  CVE-2026-15722

  389-ds-base: 389-ds-base: pre-authentication stack buffer overflow in get_ruvelement_from_berval() via unbounded replica id parsing

  A stack buffer overflow flaw was found in 389 Directory Server (389-ds-base). The get_ruvelement_from_berval() function in repl5_ruv.c copies digit characters from a network-supplied RUV berval into a fixed 16-byte stack buffer without bounds checking. A remo…

  Red Hat Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 6 Linux Debian Ubuntu Azure Linux
  Jul 31, 2026
• Medium 5.9
  CVE-2026-11788

  389-ds-base: 389-ds-base: null pointer dereference in deref control plugin ber parser

  A flaw was found in 389 Directory Server. The dereference control plugin does not check for allocation failure before using a BER structure, allowing an unauthenticated remote attacker to crash the LDAP server when the system is under memory pressure.

  Red Hat Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 6 Linux Debian Ubuntu
  Jun 9, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2484802
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2485423
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2499961
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_55422.json
• report
  https://access.redhat.com/security/cve/CVE-2026-11770
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-11770
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-11770
• article
  https://github.com/389ds/389-ds-base/blob/main/ldap/servers/plugins/replication/repl_extop.c
• report
  https://access.redhat.com/security/cve/CVE-2026-11788
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-11788
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-11788
• report
  https://access.redhat.com/security/cve/CVE-2026-15722
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-15722
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-15722