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CVE-2026-11788 (GCVE-0-2026-11788)

Vulnerability from cvelistv5 – Published: 2026-06-09 13:02 – Updated: 2026-08-18 14:47
VLAI
Title
389-ds-base: 389-ds-base: null pointer dereference in deref control plugin ber parser
Summary
A flaw was found in 389 Directory Server. The dereference control plugin does not check for allocation failure before using a BER structure, allowing an unauthenticated remote attacker to crash the LDAP server when the system is under memory pressure.
Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-09 15:11 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
URL Tags
https://access.redhat.com/errata/RHSA-2026:55421 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:55422 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:55423 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:55424 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:55425 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:55426 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:55530 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:55532 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:55756 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:55757 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:55758 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:55794 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:56047 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:56048 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:56050 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-11788 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2485423 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version CPE status
Red Hat Red Hat Directory Server 11.7 E4S for RHEL 8 Unaffected: 8080020260806114250.f969626e , < * (rpm)
    cpe:/a:redhat:directory_server_e4s:11.7::el8
Create a notification for this product.
Red Hat Red Hat Directory Server 11.9 for RHEL 8 Unaffected: 8100020260803140625.37ed7c03 , < * (rpm)
    cpe:/a:redhat:directory_server:11.9::el8
Create a notification for this product.
Red Hat Red Hat Directory Server 12.2 E4S for RHEL 9 Unaffected: 9020020260730155601.1674d574 , < * (rpm)
    cpe:/a:redhat:directory_server_e4s:12.2::el9
Create a notification for this product.
Red Hat Red Hat Directory Server 12.4 E4S for RHEL 9 Unaffected: 9040020260810131422.1674d574 , < * (rpm)
    cpe:/a:redhat:directory_server_e4s:12.4::el9
Create a notification for this product.
Red Hat Red Hat Enterprise Linux 10 Unaffected: 0:3.2.0-9.el10_2 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:10.2
Create a notification for this product.
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support Unaffected: 0:3.0.6-20.el10_0 , < * (rpm)
    cpe:/o:redhat:enterprise_linux_eus:10.0
Create a notification for this product.
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support Unaffected: 0:1.3.11.1-14.el7_9 , < * (rpm)
    cpe:/o:redhat:rhel_els:7
Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8 Unaffected: 8100020260806150504.25e700aa , < * (rpm)
    cpe:/a:redhat:enterprise_linux:8::appstream
Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Unaffected: 8040020260803141511.96015a92 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.4::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Unaffected: 8040020260803141511.96015a92 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.4::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Unaffected: 8060020260806120442.824efc52 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.6::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.6::appstream
Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Unaffected: 8060020260806120442.824efc52 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.6::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.6::appstream
Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service Unaffected: 8080020260806114228.6dbb3803 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:8.8::appstream
    cpe:/a:redhat:rhel_tus:8.8::appstream
Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Unaffected: 8080020260806114228.6dbb3803 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:8.8::appstream
    cpe:/a:redhat:rhel_tus:8.8::appstream
Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:2.8.0-9.el9_8 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:9::appstream
    cpe:/a:redhat:enterprise_linux:9::crb
Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Unaffected: 0:2.2.4-20.el9_2 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.2::appstream
Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Unaffected: 0:2.4.5-27.el9_4 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.4::appstream
Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support Unaffected: 0:2.6.1-23.el9_6 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.6::appstream
    cpe:/a:redhat:rhel_eus:9.6::crb
Create a notification for this product.
Red Hat Red Hat Directory Server 12     cpe:/a:redhat:directory_server:12
Create a notification for this product.
Red Hat Red Hat Directory Server 13     cpe:/a:redhat:directory_server:13
Create a notification for this product.
Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
Create a notification for this product.
Date Public
2026-04-16 00:00
Credits
This issue was discovered by Ian Murphy (Red Hat).
Show details on NVD website
To clipboard 

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\"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"8040020260803141511.96015a92\", \"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"389-ds:1.4\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:rhel_aus:8.4::appstream\", \"cpe:/a:redhat:rhel_eus_long_life:8.4::appstream\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"8040020260803141511.96015a92\", \"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"389-ds:1.4\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:rhel_aus:8.6::appstream\", 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\"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:directory_server:13\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Directory Server 13\", \"packageName\": \"389-ds-base\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/o:redhat:enterprise_linux:6\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 6\", \"packageName\": \"389-ds-base\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"unknown\"}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2026-04-16T00:00:00.000Z\", \"value\": \"Reported to Red Hat.\"}, {\"lang\": \"en\", \"time\": \"2026-04-16T00:00:00.000Z\", \"value\": \"Made public.\"}], \"datePublic\": \"2026-04-16T00:00:00.000Z\", \"references\": [{\"url\": \"https://access.redhat.com/errata/RHSA-2026:55421\", \"name\": 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{\"url\": \"https://access.redhat.com/errata/RHSA-2026:55532\", \"name\": \"RHSA-2026:55532\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:55756\", \"name\": \"RHSA-2026:55756\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:55757\", \"name\": \"RHSA-2026:55757\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:55758\", \"name\": \"RHSA-2026:55758\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:55794\", \"name\": \"RHSA-2026:55794\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:56047\", \"name\": \"RHSA-2026:56047\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:56048\", \"name\": \"RHSA-2026:56048\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:56050\", \"name\": \"RHSA-2026:56050\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/security/cve/CVE-2026-11788\", \"tags\": [\"vdb-entry\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://bugzilla.redhat.com/show_bug.cgi?id=2485423\", \"name\": \"RHBZ#2485423\", \"tags\": [\"issue-tracking\", \"x_refsource_REDHAT\"]}], \"workarounds\": [{\"lang\": \"en\", \"value\": \"Disable the deref plugin (most effective): dsconf \u003cinstance\u003e plugin deref disable; systemctl restart dirsrv@\u003cinstance\u003e. Disable anonymous access (nsslapd-allow-anonymous-access=off) to raise the bar from pre-auth to authenticated exploitation. Configure memory limits as defense-in-depth: set nsslapd-maxbersize and nsslapd-conntablesize, and deploy in a cgroup with memory limits.\"}], \"x_generator\": {\"engine\": \"cvelib 1.8.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"A flaw was found in 389 Directory Server. The dereference control plugin does not check for allocation failure before using a BER structure, allowing an unauthenticated remote attacker to crash the LDAP server when the system is under memory pressure.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-476\", \"description\": \"NULL Pointer Dereference\"}]}], \"providerMetadata\": {\"orgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"shortName\": \"redhat\", \"dateUpdated\": \"2026-08-18T14:47:34.154Z\"}, \"x_redhatCweChain\": \"CWE-476: NULL Pointer Dereference\"}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-11788\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-18T14:47:34.154Z\", \"dateReserved\": \"2026-06-09T12:57:59.740Z\", \"assignerOrgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"datePublished\": \"2026-06-09T13:02:53.715Z\", \"assignerShortName\": \"redhat\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.