High [CVE-2026-86344] unauthenticated worker-thread-pool exhaustion via completed-operation-then-incomplete-PDU connection requeue
This high-severity Red Hat Linux advisory covers CVE-2026-86344; related products: Red Hat Directory Server 11, Red Hat Directory Server 12, Red Hat Directory Server 13.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
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Summary
unauthenticated worker-thread-pool exhaustion via completed-operation-then-incomplete-PDU connection requeue. Red Hat rates this important (CVSS 7.5).
Weakness: CWE-400.
Affected products named by the advisory: Red Hat Directory Server 11; Red Hat Directory Server 12; Red Hat Directory Server 13; Red Hat Enterprise Linux 10; and 2 more.
Affected products named by the advisory: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 4 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 4 days ago·verify at source
Mitigation checklist
- As an interim mitigation, administrators can limit the number of concurrent connections permitted per source IP address in front of the LDAP listener (for example via a firewall, load balancer, or a tool such as fail2ban), since exploitation requires several simultaneous connections from the same attacker. Upgrading to a fixed package remains the only complete resolution.
Official advisory · high-confidence parse· fetched 4 days ago·verify at source
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