CVE-2026-92870

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{"bugzilla": {"description": "pgpool-II: pgpool-II: Denial of Service via stack-based buffer overflow", "id": "2543814", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2543814"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["A stack-based buffer overflow vulnerability exists in Pgpool-II, which may allow an unauthenticated attacker to cause abnormal process termination.", "A flaw was found in Pgpool-II. Due to a stack-based buffer overflow, an unauthenticated remote attacker can trigger abnormal process termination by sending specially crafted input to the server. This issue leads to a Denial of Service (DoS), making the service unavailable to legitimate users."], "mitigation": {"lang": "en:us", "value": "Restrict network reachability to the Pgpool-II listening port (by default TCP port 9999) using firewalld so that only trusted client application hosts can initiate connections.\nTo limit access to a trusted source subnet using firewalld rich rules, run:\nfirewall-cmd --permanent --add-rich-rule='rule family=\"ipv4\" source address=\"192.0.2.0/24\" port port=\"9999\" protocol=\"tcp\" accept'\nfirewall-cmd --reload\nIf the Pgpool-II service is not required on the system, stop and disable it:\nsystemctl stop pgpool\nsystemctl disable pgpool\nCaveats: Restricting incoming traffic blocks untrusted network hosts from reaching the proxy. Stopping the daemon prevents client connections from being pooled or routed to PostgreSQL backend servers. Warning: Reloading firewall rules or stopping the service will disrupt active client connections and cause transient connectivity outages."}, "name": "CVE-2026-92870", "public_date": "2026-09-30T07:21:24Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-92870\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-92870\nhttps://jvn.jp/en/jp/JVN22475874/\nhttps://pgpool.net/news/2026-09-29/"], "statement": "This vulnerability is rated as having an Important severity because it enables remote, unauthenticated attackers to abruptly terminate the service without prior credentials, elevating the risk beyond Moderate due to the immediate outage imposed on all dependent database operations. Pgpool-II acts as a connection pooler and proxy for PostgreSQL environments; crashing the daemon severs active connections and halts transactional processing. This component is not distributed in Red Hat Enterprise Linux and is only packaged through community channels such as Fedora.", "threat_severity": "Important"}

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