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USN-8659-4: Linux kernel (Oracle) vulnerability

unknownpublic exploitCVE-2026-64531
A security issue was discovered in the Linux kernel. An attacker could possibly use this to compromise the system. This update corrects flaws in the following subsystems: - Open vSwitch;

CSIRTS triage

vendor: Linuxproduct: LinuxPrivilege escalationDenial of serviceOther
What
A security vulnerability exists in the Linux kernel's Open vSwitch subsystem that could compromise system integrity.
Who is affected
Systems running vulnerable versions of the Linux kernel with Open vSwitch functionality enabled.
Urgency
Kernel vulnerabilities affecting core networking infrastructure require urgent patching as compromise scope is system-wide.
Action
Update the Linux kernel on Oracle-managed systems using the provided USN-8659-4 patch.

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Details

Source
Ubuntu Security Notices (INTL · vendor-psirt · site)
Severity
unknown
Published
2026-08-26
Exploitation
Not in CISA KEV at last sync

Original advisory: https://ubuntu.com/security/notices/USN-8659-4

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.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-64531coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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