Bug 2495003

Summary: CVE-2026-11788 389-ds-base: 389-ds-base: NULL pointer dereference in deref control plugin BER parser [fedora-all]
Product: [Fedora] Fedora Reporter: Samuele Negrini <snegrini>
Component: 389-ds-baseAssignee: mreynolds
Status: NEW --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: 45CC: abokovoy, jachapma, mreynolds, spichugi, tbordaz, vashirov
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---Flags: fedora-admin-xmlrpc: mirror+
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["adb64b26-9ac7-49c3-98ae-f8480f7021da"]}
Fixed In Version: Doc Type: ---
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Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On:    
Bug Blocks: 2485423    

Description Samuele Negrini 2026-06-30 16:01:10 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

The dereference control plugin in 389 Directory Server fails to check the return value of ber_init() for NULL before use in deref_parse_ctrl_value() (deref.c). When memory allocation fails under memory pressure, an unauthenticated LDAP client sending a search with the deref control can crash ns-slapd.

The deref plugin is enabled by default. Crash confirmed via GDB fault injection on Fedora 42 (SIGABRT) and CentOS 7 (SIGSEGV on OpenLDAP 2.4). Vulnerable code present since deref plugin introduction in 389-ds-base 1.2.6 (~2010).
Comment 1 Aoife Moloney 2026-08-17 15:07:24 UTC 
This bug appears to have been reported against 'rawhide' during the Fedora Linux 45 development cycle.
Changing version to 45.