PT-2026-48701 · Red Hat · Red Hat Directory Server 11+7

Published 2026-06-11 · Updated 2026-06-11 · CVE-2026-11774

Mitre

CVSS v3.1

7.6

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H

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-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.

Fix

Integer Overflow

Weakness Enumeration

CWE-190

Related Identifiers

CVE-2026-11774

Affected Products

Red Hat Directory Server 11

Red Hat Directory Server 12

Red Hat Directory Server 13

Red Hat Enterprise Linux 10

Red Hat Enterprise Linux 6

Red Hat Enterprise Linux 7

Red Hat Enterprise Linux 8

Red Hat Enterprise Linux 9

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-11774 · Security Note
• https://redhat.atlassian.net/browse/PSIRTSUPT-7600 · Note
• https://access.redhat.com/security/cve/CVE-2026-11774 · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2484916 · Note