Bug 2427679 (CVE-2026-22185)

Summary: CVE-2026-22185 OpenLDAP: OpenLDAP LMDB: Denial of Service and Information Disclosure via Heap Buffer Underflow
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in OpenLDAP Lightning Memory-Mapped Database (LMDB) mdb_load. When processing malformed input, a local attacker can exploit a heap buffer underflow vulnerability in the readline() function. This can lead to an out-of-bounds read, potentially causing a denial of service (DoS) and limited disclosure of heap memory contents.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2427790, 2427791    
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Description OSIDB Bzimport 2026-01-07 21:02:07 UTC 
OpenLDAP Lightning Memory-Mapped Database (LMDB) mdb_load contains a heap buffer underflow vulnerability in the readline() function. When processing malformed input, an unsigned offset calculation can underflow a heap pointer, resulting in an out-of-bounds read of one byte before the allocated heap buffer. This may allow a local attacker to cause a denial of service and potentially disclose limited heap memory contents.