CVE-2026-11610

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 copied into a 512-byte heap receive buffer without a bounds check in sasliorecv() in sasl_io.c. This allows up to approximately 2 megabytes of attacker-controlled data to overflow the buffer, causing a denial of service (server crash). In FreeIPA and Red Hat Identity Management deployments, any domain user with a valid Kerberos ticket, any enrolled host, or any service account can trigger this vulnerability over the network after authenticating via GSSAPI. The vulnerable code path has existed since approximately 2013 (389-ds-base 1.3.2) and was not addressed by the CVE-2025-14905 fix, which patched a separate heap overflow in schema.c only.

Database specific

{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/11xxx/CVE-2026-11610.json",
    "cna_assigner": "redhat",
    "cwe_ids": [
        "CWE-122"
    ]
}

References

Affected packages

Git / github.com/389ds/389-ds-base

Affected ranges

Type

GIT

Repo

https://github.com/389ds/389-ds-base

Events

Introduced

ba3fb44d9d147e82926d11102cddaf258e1f7009

Last affected

01a3dfa82c0c0121be34cfe1646d8ced3684a18d

Database specific

{
    "extracted_events": [
        {
            "introduced": "1.3.2"
        },
        {
            "last_affected": "3.3.0"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-11610.json"