CVE-2026-20339

A vulnerability in the PESpin file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition or possibly other expanded impacts as a result of memory corruption on an affected device. This vulnerability is due to improper boundary checks for content in PESpin files during scanning, which may result in an integer overflow. An attacker could exploit this vulnerability by submitting a crafted file that contains PESpin content to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to cause the ClamAV scanning process to terminate, resulting in a DoS condition on the affected software.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-WuuvVd26

Configurations

No configuration.

History

23 Oct 2026, 20:10

Type	Values Removed	Values Added
Summary		(es) Una vulnerabilidad en el analizador de formato de archivo PESpin de ClamAV podría permitir a un atacante remoto no autenticado causar una condición de DoS o posiblemente otros impactos expandidos como resultado de corrupción de memoria en un dispositivo afectado. Esta vulnerabilidad se debe a comprobaciones de límites inadecuadas para el contenido en archivos PESpin durante el escaneo, lo que puede resultar en un desbordamiento de entero. Un atacante podría explotar esta vulnerabilidad al enviar un archivo manipulado que contiene contenido PESpin para ser escaneado por ClamAV en un dispositivo afectado. Un exploit exitoso podría permitir al atacante causar la terminación del proceso de escaneo de ClamAV, lo que resultaría en una condición de DoS en el software afectado.

Information

Published : 2026-08-07 17:17

Updated : 2026-10-23 20:10

NVD link : CVE-2026-20339

Mitre link : CVE-2026-20339

CVE.ORG link : CVE-2026-20339

JSON object : View

Products Affected

No product.

CWE

CWE-190

Integer Overflow or Wraparound

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{"status": "affected", "version": "7.4.1.20425"}, {"status": "affected", "version": "7.4.1.20439"}, {"status": "affected", "version": "7.4.3"}, {"status": "affected", "version": "7.4.3.20679"}, {"status": "affected", "version": "7.4.5"}, {"status": "affected", "version": "7.5.1.20813"}, {"status": "affected", "version": "7.5.1.20833"}, {"status": "affected", "version": "7.5.3"}, {"status": "affected", "version": "7.5.5"}, {"status": "affected", "version": "8.0.1.21160"}, {"status": "affected", "version": "8.0.1.21164"}, {"status": "affected", "version": "7.5.7"}, {"status": "affected", "version": "7.5.9"}, {"status": "affected", "version": "7.5.11"}, {"status": "affected", "version": "8.1.7.21585"}, {"status": "affected", "version": "7.5.13.21586"}, {"status": "affected", "version": "7.5.13.21598"}, {"status": "affected", "version": "8.2.1.21612"}, {"status": "affected", "version": "8.2.1.21650"}, {"status": "affected", "version": "7.5.15.21611"}, {"status": "affected", "version": 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[{"lang": "en", "value": "CWE-190"}]}], "descriptions": [{"lang": "en", "value": "A vulnerability in the PESpin file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition or possibly other expanded impacts as a result of memory corruption on an affected device.\r\n\r\nThis vulnerability is due to improper boundary checks for content in PESpin files during scanning, which may result in an integer overflow. An attacker could exploit this vulnerability by submitting a crafted file that contains PESpin content to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to cause the ClamAV scanning process to terminate, resulting in a DoS condition on the affected software."}, {"lang": "es", "value": "Una vulnerabilidad en el analizador de formato de archivo PESpin de ClamAV podr\u00eda permitir a un atacante remoto no autenticado causar una condici\u00f3n de DoS o posiblemente otros impactos expandidos como resultado de corrupci\u00f3n de memoria en un dispositivo afectado.\n\nEsta vulnerabilidad se debe a comprobaciones de l\u00edmites inadecuadas para el contenido en archivos PESpin durante el escaneo, lo que puede resultar en un desbordamiento de entero. Un atacante podr\u00eda explotar esta vulnerabilidad al enviar un archivo manipulado que contiene contenido PESpin para ser escaneado por ClamAV en un dispositivo afectado. Un exploit exitoso podr\u00eda permitir al atacante causar la terminaci\u00f3n del proceso de escaneo de ClamAV, lo que resultar\u00eda en una condici\u00f3n de DoS en el software afectado."}], "lastModified": "2026-10-23T20:10:00.160", "sourceIdentifier": "psirt@cisco.com"}