USN-8568-1: Linux kernel (OEM) vulnerabilities

CSIRTS triage

What

Local attackers could exploit vulnerabilities in AMD processors to escalate privileges.

Who is affected

Deployments of affected AMD processors using the Linux kernel.

Urgency

Remediation is urgent due to high severity and potential for exploitation.

Action

Apply the latest kernel updates to mitigate these vulnerabilities.

AI-assisted analysis generated from the source advisory — verify against the original.

Details

Source

Ubuntu Security Notices (INTL · vendor-psirt · site)

Severity

high

Published

2026-07-20

Exploitation

Not in CISA KEV at last sync

Original advisory: https://ubuntu.com/security/notices/USN-8568-1

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

• Low exploitation riskCVE-2025-545180.26% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 17% of all scored CVEs.
• Low exploitation riskCVE-2026-434900.41% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 34% of all scored CVEs.
• Low exploitation riskCVE-2026-434920.15% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 5% of all scored CVEs.
• Low exploitation riskCVE-2026-434950.26% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 18% of all scored CVEs.
• Low exploitation riskCVE-2026-434960.12% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all scored CVEs.
• Low exploitation riskCVE-2026-434970.11% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all scored CVEs.
• Low exploitation riskCVE-2026-434980.11% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all scored CVEs.
• Low exploitation riskCVE-2026-435020.12% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all scored CVEs.
• Low exploitation riskCVE-2026-458340.12% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all scored CVEs.
• Low exploitation riskCVE-2026-458350.12% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all scored CVEs.

Referenced CVEs

+395 more CVEs referenced in this advisory.

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

• highUSN-8620-4: Linux kernel (Intel IoTG) vulnerabilitiesubuntu
• high[UPDATE] [high] Linux Kernel: Multiple vulnerabilitiescert-bund
• medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilities allow unspecified attackcert-bund
• high[UPDATE] [high] Linux Kernel: Multiple vulnerabilities enable denial of servicecert-bund
• high[UPDATE] [high] Linux Kernel: Multiple vulnerabilitiescert-bund
• high[UPDATE] [high] Linux Kernel: Multiple vulnerabilities allow denial of servicecert-bund
• high[UPDATE] [high] Linux Kernel: Multiple Vulnerabilitiescert-bund
• medium[UPDATE] [medium] Linux Kernel (Bluetooth): Multiple vulnerabilities allow Denial of Servicecert-bund
• high[UPDATE] [medium] Linux Kernel: Vulnerability Allows Unspecified Attackcert-bund
• high[UPDATE] [high] Linux Kernel: Multiple vulnerabilitiescert-bund
• medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilitiescert-bund
• highUSN-8620-3: Linux kernel (Intel IoTG) vulnerabilitiesubuntu

More from Ubuntu Security Notices

• highUSN-8620-4: Linux kernel (Intel IoTG) vulnerabilities2026-07-31
• highUSN-8620-3: Linux kernel (Intel IoTG) vulnerabilities2026-07-31
• unknownUSN-8625-1: OpenSSL vulnerability2026-07-30
• unknownUSN-8624-1: Sinatra vulnerability2026-07-29
• unknownUSN-8623-1: Linux kernel (NVIDIA) vulnerabilities2026-07-29