A vulnerability was found in Libevent up to 2.1.12/2.2.1. It has been classified as critical. Affected by this vulnerability is the function evbuffer_add_buffer_reference of the file buffer.c of the component Buffer. This manipulation of the argument out_total_len causes use after free. This vulnerability is handled as CVE-2026-63381. The attack... Weiterlesen
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CVE-2026-63381 | Libevent up to 2.1.12/2.2.1 Buffer buffer.c evbuffer_add_buffer_reference out_total_len use after free (Nessus ID 338655 / WID-SEC-2026-3419)
A vulnerability was found in Libevent up to 2.1.12/2.2.1. It has been classified as critical. Affected by this vulnerability is the function evbuffer_add_buffer_reference of the file buffer.c of the component Buffer. This manipulation of…
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CVE-2026-63381
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title: Detect Exploitation - CVE-2026-63381 | Libevent up to 2.1.12/2.2.1 Buffer buffer.c evbuffer_add_buffer_reference out_total_len use after free (Nessus ID 338655 / WID-SEC-2026-3419)
id: f03ee5d6-f3ce-4051-ae63-41914ac7239f
status: experimental
description: Automatisch generierte SIEM-Erkennungsregel basierend auf CTI Intelligence
references:
- https://tsecurity.de/
author: iShareStuff CTI Automated Detection Engine
date: 2026-09-24
logsource:
category: network_connection
product: any
detection:
selection:
CommandLine|contains:
- 'exploit'
condition: selection
falsepositives:
- Legitime administrative Zugriffe oder Penetrationstests
level: high
tags:
- attack.initial_accessrule CTI_Threat_Indicator {
meta:
author = "iShareStuff CTI Automated Detection Engine"
date = "2026-09-24"
description = "YARA Signature for "
strings:
$str = "CVE-2026-63381 | Libevent up t" ascii wide
condition:
any of them
}INFRASTRUCTURE BLAST RADIUS & EXPOSURE
Live-Vektor: LOCAL
LOCALIZED
Perimeter & Ingress
Geringes Risiko
Lateral Pivot & AD
GEFÄHRDET (80%)
Crown Jewels & DB
Geringes Risiko
Supply Chain Reach
Geringes Risiko
tsecurity.de Cognitive Threat RAG
Fokus-Vektor:
Kognitive Analyse für identifizierte Bedrohung: Erhöhte Bedrohungslage im Bereich CVE-2026-63381 | Libevent up to 2.1.12/2.... Basierend auf 368k Vektor-Korrelationen werden sofortige Isolationsmaßnahmen für betroffene Endpunkte empfohlen.
🛡️ Angriffsfläche & Exposure
Netzwerk/Remote-Zugriff ohne Vorauthentifizierung möglich.
⚡ Empfohlene Sofortmaßnahmen
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