{"id":"CVE-2026-11774","title":"An integer overflow flaw was found in the SASL I/O layer of 389 Directory Server (389-ds-base)","summary":"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, b…","severity":"high","cvss":7.6,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H","cwe":["CWE-190","CWE-190"],"published":"2026-06-11","updated":"2026-07-07","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-11774","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:36197","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:36198","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:36204","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:36208","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-11774","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2484916","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-11774","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2484916","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-11774.json","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}],"tags":["nvd"],"epss":0.00796,"epssPercentile":0.54958,"ingestedAt":"2026-07-07T13:53:11.814Z","slug":"CVE-2026-11774","body":"## Overview\n\nAn 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-maxsasliosize limit and leading to a heap buffer overflow of up to approximately 2 megabytes of attacker-controlled data. After a successful SASL bind with integrity protection (SSF > 0), a remote attacker can cause a Denial of Service (DoS) or achieve Remote Code Execution (RCE). In FreeIPA and Red Hat Identity Management deployments, any domain user with a valid Kerberos ticket, enrolled host, or service account can trigger this vulnerability over the network. This flaw is independent of CVE-2025-14905, which patched schema.c only and did not modify sasl_io.c.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":41.8,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}