CVE-2026-0318

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Stack-Based Buffer Overflow in Palo Alto PAN-OS Log Processing

Publication date: 2026-10-14

Last updated on: 2026-10-15

Assigner: Palo Alto Networks, Inc.

Description

A stack-based buffer overflow vulnerability in the log processing functionality of Palo Alto Networks PAN-OS® software on Panorama enables an attacker to cause a denial of service (DoS) condition. Repeated attempts to trigger this condition result in the Panorama entering maintenance mode. Cloud NGFW, Prisma® Access, and standalone PAN-OS firewalls are not affected by this vulnerability.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-10-14

Last Modified

2026-10-15

Generated

2026-10-19

AI Q&A

2026-10-15

EPSS Evaluated

2026-10-18

NVD

CVE-2026-0318

EUVD

EUVD-2026-101636

Affected Vendors & Products

Vendor	Product	Version / Range
Palo	Alto	Networks PAN-OS 12.2.0
Palo	Alto	Networks PAN-OS 12.1.0
Palo	Alto	Networks PAN-OS 11.2.0
Palo	Alto	Networks PAN-OS 11.1.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-754	The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product.

Attack-Flow Graph

Executive Summary

This is a stack-based buffer overflow in the log processing functionality of Palo Alto Networks PAN-OS software on Panorama. It allows an attacker to cause a denial of service (DoS) by triggering repeated overflow attempts, which can force the Panorama system into maintenance mode.

Detection Guidance

Detection of this vulnerability requires monitoring for abnormal log processing behavior or DoS conditions on Palo Alto Networks PAN-OS Panorama systems. Check for repeated crashes, maintenance mode entries, or unusual log file sizes. Review system logs for stack overflow errors in log processing components.

Impact Analysis

The vulnerability can cause your Palo Alto Panorama system to become unavailable due to a DoS condition. This disrupts management and monitoring functions, potentially leading to loss of visibility and control over network security.

Compliance Impact

The vulnerability causes a denial of service (DoS) condition in Palo Alto Networks PAN-OS software on Panorama, potentially disrupting logging and monitoring capabilities. This could impact compliance with standards like GDPR or HIPAA, which require continuous logging and availability of security systems.

Mitigation Strategies

Update PAN-OS software on Panorama to the latest version to address the stack-based buffer overflow vulnerability in log processing functionality.

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