CentOS 9 Vulnerability Allows Privilege Escalation to Root

First seen 6 Feb 2026, 11:13 UTC • Cybersecuritynews

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A critical use-after-free vulnerability in the Linux kernel's sch_cake Qdisc affects CentOS 9, enabling local users to escalate privileges to root. The flaw was disclosed by SSD Secure Disclosure on February 5, 2026, and was recognized as a top vulnerability in the Linux category at TyphoonPWN 2025.

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Attack Flow

8 entities, 13 inferred relationships (STIX 2.1).

Technique (4)

Data Breach
Malware
Zero-day Exploit
T1068 - Exploitation for Privilege Escalation

Organization (1)

SSD Secure Disclosure

Affected Platform (3)

CentOS
CentOS 9
Linux

Relationships

Data Breach targets CentOS
Data Breach targets CentOS 9
Data Breach targets Linux
Malware targets CentOS
Malware targets CentOS 9
Malware targets Linux
Zero-day Exploit targets CentOS
Zero-day Exploit targets CentOS 9
Zero-day Exploit targets Linux
T1068 - Exploitation for Privilege Escalation targets CentOS
T1068 - Exploitation for Privilege Escalation targets CentOS 9
T1068 - Exploitation for Privilege Escalation targets Linux
Data Breach related to SSD Secure Disclosure

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CentOS 9 Vulnerability Allows Privilege Escalation to Root

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