Authenticated code execution via schema alias overflow
Published Feb 23, 2026 · Updated Feb 23, 2026
Heap buffer overflow in 389-ds-base allows remote authenticated users to crash Directory Server or execute arbitrary code. schema_attr_enum_callback sums only alias-string lengths before printing three additional formatting bytes per alias, relying on a fixed 256-byte margin for the omitted overhead. High privileges on the LDAP service and enough schema aliases are required; the resulting heap corruption crashes the server or executes code in its process.
Summary
What happened
Heap buffer overflow in 389-ds-base allows remote authenticated users to crash Directory Server or execute arbitrary code. schema_attr_enum_callback sums only alias-string lengths before printing three additional formatting bytes per alias, relying on a fixed 256-byte margin for the omitted overhead. High privileges on the LDAP service and enough schema aliases are required; the resulting heap corruption crashes the server or executes code in its process.
The record
- CVE
- CVE-2025-14905
- Published
- Feb 23, 2026
- Updated
- Feb 23, 2026
- Vendor
- 389 Directory Server
- Product
- Red Hat Directory Server
- Classifications
- CWE-122, T1210
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Feb 23, 2026CVE publishedPublication date reported by the CVE source.
- Feb 23, 2026Record updatedLatest update available in the CVE record.
Exploitability
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What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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