CVE-2026-19519 in Advanced Cluster Security
Summary
by MITRE • 08/11/2026
A flaw was found in claircore's RPM package scanner. Crafted RPM header data in a container layer can cause an unchecked type assertion to panic the scanner. The panic is not recovered, causing the Clair indexer process to crash, leading to a denial of service.
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Analysis
by VulDB Data Team • 08/11/2026
This vulnerability resides within claircore's RPM package scanner component, representing a critical denial of service weakness that can be exploited through crafted RPM header data within container layers. The flaw manifests as an unchecked type assertion that leads to a panic condition in the scanner process, creating a cascading failure scenario where the Clair indexer process terminates unexpectedly.
The technical execution of this vulnerability involves manipulating RPM header metadata within container layer files to trigger an unhandled type assertion failure. When the scanner encounters this malformed data during package analysis, it attempts to perform a type assertion operation without proper validation, resulting in an immediate panic state that cannot be recovered from within the application's error handling framework. This specific weakness aligns with CWE-470, which addresses the use of insecure functions that can lead to unexpected program termination through unchecked operations.
The operational impact of this vulnerability extends beyond simple service disruption, as it represents a potential attack vector for adversaries seeking to compromise container scanning infrastructure. When the Clair indexer process crashes due to this panic condition, it creates a denial of service scenario that prevents legitimate package scanning operations from completing successfully. This can lead to extended downtime for security scanning capabilities and may require manual intervention to restart affected services.
From an ATT&CK framework perspective, this vulnerability maps to TA0043 (Reconnaissance) and TA0045 (Security Testing) where adversaries might use such flaws to identify weaknesses in container security tooling. The vulnerability specifically targets the privilege escalation and defense evasion categories by allowing attackers to disrupt legitimate security operations through controlled input manipulation.
Mitigation strategies should focus on implementing proper error recovery mechanisms within the RPM scanner component, including comprehensive input validation of RPM header data before type assertion operations are performed. Organizations should deploy automated monitoring solutions to detect process crashes and implement robust restart procedures for the Clair indexer service. Additionally, regular updates to claircore components and implementation of network segmentation can help limit the impact of such vulnerabilities in production environments.