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Red Hat IPA CVE-2026-73199

| EUVDEUVD-2026-63246 MEDIUM
NULL Pointer Dereference (CWE-476)
2026-08-20 redhat GHSA-mjqg-mjqw-9xv8
Null Pointer Dereference Denial Of Service 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 Red Hat Suse
6.5
CVSS 3.1 · Vendor: redhat
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Severity by source

Vendor (redhat) PRIMARY
6.5 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
vuln.today AI
6.5 MEDIUM

Network-reachable LDAP endpoint requires authenticated bind (PR:L); null dereference crashes server with no confidentiality or integrity impact.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SUSE
MEDIUM
qualitative
Red Hat
6.5 MEDIUM
qualitative

Primary rating from Vendor (redhat).

CVSS VectorVendor: redhat

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

2
Analysis Generated
Aug 20, 2026 - 11:36 vuln.today
CVE Published
Aug 20, 2026 - 10:39 nvd
MEDIUM 6.5

DescriptionCVE.org

A flaw was found in the ipa-enrollment SLAPI plugin. A remote authenticated client can exploit a null pointer dereference vulnerability by sending a malformed Lightweight Directory Access Protocol (LDAP) extended operation. By omitting the request value for the JOIN_OID in the ipa-enrollment extended operation, an attacker can trigger a server crash, potentially causing a denial of service.

AnalysisAI

Denial of service in FreeIPA's ipa-enrollment SLAPI plugin allows any authenticated LDAP client to crash the 389 Directory Server by sending a malformed extended operation. The flaw (CWE-476, null pointer dereference) is triggered by omitting the request value for the JOIN_OID in the ipa-enrollment extended operation, causing the server to dereference a null pointer and crash. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Obtain valid IdM domain credentials
Delivery
Establish authenticated LDAP bind to directory server
Exploit
Send JOIN_OID extended operation with omitted request value
Execution
Trigger null pointer dereference in ipa-enrollment plugin
Persist
Crash 389 Directory Server process
Impact
Disrupt domain-wide IdM services
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Vulnerability AssessmentAI

Exploitation Exploitation requires a valid LDAP bind credential against the affected 389 Directory Server instance hosting the ipa-enrollment SLAPI plugin - this aligns with CVSS PR:L (low privileges). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The provided CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H) scores 6.5 and accurately characterizes the threat: network-reachable, low complexity, but gated behind at minimum low-privilege authentication (PR:L - a valid LDAP bind). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker who possesses any valid LDAP credential in the Red Hat IdM domain - including a low-privilege domain user - connects to the 389 Directory Server on TCP port 389 or 636 and sends a crafted LDAP extended operation request for the JOIN_OID with the request value field intentionally omitted from the BER encoding. The ipa-enrollment SLAPI plugin attempts to dereference the null request value pointer, triggering a process crash that brings down the directory server and disrupts all IdM-dependent services across the domain. …
Remediation The primary fix is to apply the vendor-supplied patch for the ipa-server or ipa-enrollment package once released by Red Hat; an exact fixed package version is not independently confirmed in the available intelligence - consult https://access.redhat.com/security/cve/CVE-2026-73199 for the current errata status and specific RPM versions. … Detailed patch versions, workarounds, and compensating controls in full report.
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Same weakness CWE-476 – NULL Pointer Dereference

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Same technique Null Pointer Dereference

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CVE-2016-0742 HIGH
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CVE-2014-3470 MEDIUM
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Vendor StatusVendor

SUSE

Severity: Moderate

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CVE-2026-73199 vulnerability details – vuln.today
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