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

Fixed packages 7

Vulnerabilities 2

• High 8.8
  CVE-2026-11610

  389-ds-base: 389-ds-base: heap buffer overflow in sasl_io_recv() via padded sasl unbind

  A heap buffer overflow flaw was found in the SASL I/O layer of 389 Directory Server (389-ds-base). After a successful SASL bind with integrity protection (SSF > 0), an authenticated attacker can send a specially crafted oversized LDAP UNBIND packet that is co…

  Red Hat 389ds Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Linux Debian Ubuntu Azure Linux
  Jul 7, 2026
• High 7.6
  CVE-2026-11774

  389-ds-base: 389-ds-base: integer overflow in sasl packet length bypasses size limit leading to heap buffer overflow

  An integer overflow flaw was found in the SASL I/O layer of 389 Directory Server (389-ds-base). In sasl_io_start_packet(), adding sizeof(uint32_t) to a crafted SASL packet length prefix of 0xFFFFFFFC causes unsigned wraparound to zero, bypassing the nsslapd-m…

  Red Hat Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 6 Linux Debian Ubuntu
  Jun 11, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2484414
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2484916
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_36585.json
• report
  https://access.redhat.com/security/cve/CVE-2026-11610
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-11610
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-11610
• report
  https://access.redhat.com/security/cve/CVE-2026-11774
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-11774
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-11774
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-14905