CVE-2026-11788: NULL Pointer Dereference in Red Hat Red Hat Directory Server 11
CVE-2026-11788 is a medium severity vulnerability in Red Hat Directory Server 11 where the dereference control plugin fails to check for allocation failure before using a BER structure. This flaw allows an unauthenticated remote attacker to cause a NULL pointer dereference, leading to a crash of the LDAP server under memory pressure conditions.
AI Analysis
Technical Summary
The vulnerability in Red Hat Directory Server 11 involves the dereference control plugin not verifying successful allocation of a BER structure before use. This can result in a NULL pointer dereference when the system is under memory pressure. An unauthenticated remote attacker can exploit this to crash the LDAP server, causing a denial of service. The CVSS 3.1 score is 5.9 (medium severity) with network attack vector, high attack complexity, no privileges required, no user interaction, and impact limited to availability.
Potential Impact
An unauthenticated remote attacker can cause a denial of service by crashing the LDAP server due to a NULL pointer dereference triggered under memory pressure. There is no impact on confidentiality or integrity reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-11788 for current remediation guidance. No official fix or workaround is explicitly stated in the provided advisory content.
CVE-2026-11788: NULL Pointer Dereference in Red Hat Red Hat Directory Server 11
Description
CVE-2026-11788 is a medium severity vulnerability in Red Hat Directory Server 11 where the dereference control plugin fails to check for allocation failure before using a BER structure. This flaw allows an unauthenticated remote attacker to cause a NULL pointer dereference, leading to a crash of the LDAP server under memory pressure conditions.
CVSS v3.1
Score 5.9medium
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in Red Hat Directory Server 11 involves the dereference control plugin not verifying successful allocation of a BER structure before use. This can result in a NULL pointer dereference when the system is under memory pressure. An unauthenticated remote attacker can exploit this to crash the LDAP server, causing a denial of service. The CVSS 3.1 score is 5.9 (medium severity) with network attack vector, high attack complexity, no privileges required, no user interaction, and impact limited to availability.
Potential Impact
An unauthenticated remote attacker can cause a denial of service by crashing the LDAP server due to a NULL pointer dereference triggered under memory pressure. There is no impact on confidentiality or integrity reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-11788 for current remediation guidance. No official fix or workaround is explicitly stated in the provided advisory content.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-06-09T12:57:59.740Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-11788","vendor":"Red Hat"}]
Threat ID: 6a28145b8dd33fbd85364a25
Added to database: 6/9/2026, 1:25:47 PM
Last enriched: 6/9/2026, 1:41:17 PM
Last updated: 6/9/2026, 2:33:43 PM
Views: 4
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.