Linux Security Updates – 12 July 2026

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Linux has released security updates to address several vulnerabilities in the Linux Kernel.

The addressed vulnerabilities allow the attacker to gain elevated privileges, manipulate data, or execute arbitrary code on the affected systems.

Sample of the addressed vulnerabilities:

Linux Kernel’s Real-Time Mutex Vulnerability (CVE-2026-43499):

  • CVSS: 7.8
  • Attack Vector: Local
  • Attack Complexity: Low
  • Privileges Required: Low
  • User Interaction: None
  • Consequences: Gain Privileges

It should be highlighted that security researchers publicly disclosed a proof-ofconcept(PoC) for the vulnerability “CVE-2026-43499” that exists in the wild.

Vulnerabilities
  • CVE-2026-43499
  • CVE-2026-53363
Mitigations

The enterprise should deploy the patches as soon as the testing phase is completed and should check with its vendors for updates, if any.

Below is a sample of the distributors’ fixes:

References