Integer overflow in Red Hat Directory Server 11
CVE-2026-11774
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, byp…
Vulnerability class: Integer Overflow
EPSS: 0.007 (48.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H.
Affected products
- Red Hat Directory Server 11
- Red Hat Directory Server 11.5 E4s For Rhel 8 — versions 8060020260702180044.0ca98e7e
- Red Hat Directory Server 11.7 E4s For Rhel 8 — versions 8080020260702180836.f969626e
- Red Hat Directory Server 11.9 For Rhel 8 — versions 8100020260702145313.37ed7c03
- Red Hat Directory Server 12
- Red Hat Directory Server 12.2 E4s For Rhel 9 — versions 9020020260703060155.1674d574
- Red Hat Directory Server 12.4 E4s For Rhel 9 — versions 9040020260703055735.1674d574
- Red Hat Directory Server 13
- Red Hat Directory Server 13.2 — versions 1783452100
- Red Hat Enterprise Linux 10 — versions 0:3.2.0-8.el10_2
Weakness classification (CWE)
References
- secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
- secalert@redhat.com (x_refsource_REDHAT, issue-tracking)
- secalert@redhat.com
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
Frequently asked questions
- What is CVE-2026-11774?
- CVE-2026-11774 is a high-severity vulnerability in Red Hat Directory Server 11, classified under Integer Overflow or Wraparound. CVSS score: 7.6/10. Published 2026-06-11.
- How severe is CVE-2026-11774?
- High severity. CVSS v3 base score is 7.6 out of 10.