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Critical Linux Kernel Vulnerabilities Exploited in the Wild

Critical Linux Kernel Vulnerabilities Exploited in the Wild

First seen 29 Sep 2026, 15:41 UTC • •
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ThreatCluster AI
ThreatCluster •September 30, 2026 at 09:36 UTC
  • •Multiple critical vulnerabilities in the Linux kernel for NVIDIA systems have been confirmed.
  • •CISA has reported active exploitation of these vulnerabilities in the wild.
  • •Users must update to the latest kernel versions to mitigate risks.

On September 29, 2026, Ubuntu released an advisory regarding multiple vulnerabilities in the Linux kernel affecting NVIDIA systems. These vulnerabilities, identified as CVE-2026-53131, CVE-2026-53186, CVE-2026-53216, CVE-2026-53221, CVE-2026-53355, CVE-2026-63886, CVE-2026-63887, CVE-2026-63888, CVE-2026-63912, CVE-2026-63922, CVE-2026-63924, CVE-2026-63984, CVE-2026-63992, CVE-2026-63993, CVE-2026-63994, CVE-2026-64000, CVE-2026-64007, and CVE-2026-64091, could allow attackers to compromise systems. The vulnerabilities affect various subsystems, including InfiniBand drivers, network drivers, and the B.A.T.M.A.N. meshing protocol. Users are advised to update their systems to the latest package versions to mitigate the risks. The vulnerabilities were confirmed by CISA, indicating active exploitation in the wild. Affected systems include Ubuntu 24.04 LTS and 22.04 LTS. Administrators are urged to reboot their systems after applying the updates to ensure all changes take effect.

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Timeline

2026-06-25
CVE-2026-53131 published
Multiple vulnerabilities in the Linux kernel were disclosed, affecting NVIDIA systems.
Linuxsecurity
2026-06-25
CVE-2026-53221 published
Vulnerability assigned a CVE identifier and published in the National Vulnerability Database.
MITRE
2026-06-25
CVE-2026-53186 published
Vulnerability assigned a CVE identifier and published in the National Vulnerability Database.
MITRE
2026-06-25
CVE-2026-53216 published
Vulnerability assigned a CVE identifier and published in the National Vulnerability Database.
MITRE
2026-07-01
CVE-2026-53355 published
Vulnerability assigned a CVE identifier and published in the National Vulnerability Database.
MITRE
2026-07-19
CVE-2026-63922 published
Vulnerability assigned a CVE identifier and published in the National Vulnerability Database.
MITRE
2026-07-19
CVE-2026-63887 published
Vulnerability assigned a CVE identifier and published in the National Vulnerability Database.
MITRE
2026-07-19
CVE-2026-63886 published
Vulnerability assigned a CVE identifier and published in the National Vulnerability Database.
MITRE
2026-07-19
CVE-2026-63888 published
Vulnerability assigned a CVE identifier and published in the National Vulnerability Database.
MITRE
2026-07-19
CVE-2026-63912 published
Vulnerability assigned a CVE identifier and published in the National Vulnerability Database.
MITRE

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