A stack buffer overflow flaw was found in 389 Directory Server (389-ds-base). The get_ruvelement_from_berval() function in repl5_ruv.c copies digit characters from a network-supplied RUV berval into a fixed 16-byte stack buffer without bounds checking. A remote unauthenticated attacker can crash the LDAP server by sending a crafted StartNSDS50ReplicationRequest extended operation containing a replica ID field with more than 16 digit characters. The overflow occurs during payload decoding, before any authorization check. Stack protectors limit impact to denial of service.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade 389-ds-base-develUpgrade 389-ds-base-snmpUpgrade 389-ds-base-libsUpgrade python3-lib389Upgrade 389-ds-base-legacy-toolsUpgrade 389-ds-base | Oct 11, 2026 | Aug 17, 2026 |
| Redhat_linux | — | Upgrade 389-ds-base-bdb-debuginfoUpgrade 389-ds-base-snmpUpgrade 389-ds-base-debuginfoNo solution existsUpgrade 389-ds-base-libs-debuginfoUpgrade 389-ds-base-snmp-debuginfoUpgrade 389-ds-base-bdbUpgrade 389-ds-base-debugsourceUpgrade 389-ds-base-legacy-tools-debuginfoUpgrade 389-ds-base-develUpgrade 389-ds-baseUpgrade 389-ds-base-legacy-toolsUpgrade python3-lib389Upgrade 389-ds-base-libs | Aug 4, 2026 | Jul 31, 2026 |
| Rocky_linux | — | Upgrade 389-ds-baseUpgrade 389-ds-base-develUpgrade 389-ds-base-snmp-debuginfoUpgrade 389-ds-base-legacy-tools-debuginfoUpgrade 389-ds-base-debuginfoUpgrade 389-ds-base-debugsourceUpgrade 389-ds-base-legacy-toolsUpgrade 389-ds-base-snmpUpgrade 389-ds-base-libs-debuginfoUpgrade 389-ds-base-bdb-debuginfoUpgrade 389-ds-base-libsUpgrade 389-ds-base-bdb | Aug 20, 2026 | Aug 17, 2026 |
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