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Multiple Linux Kernel Vulnerabilities Disclosed Affecting Various Architectures

Multiple Linux Kernel Vulnerabilities Disclosed Affecting Various Architectures

First seen 6 Nov 2026, 13:15 UTC • •
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ThreatCluster AI
ThreatCluster •November 6, 2026 at 13:16 UTC
  • •CVE-2023-20585 could compromise AMD SEV-SNP guest memory integrity.
  • •CVE-2026-81010 may lead to denial of service due to io_uring subsystem flaws.
  • •Patches are available and should be applied immediately to affected systems.

On November 6, 2026, Ubuntu published advisories for two significant vulnerabilities in the Linux kernel. The first, CVE-2023-20585, affects AMD processors and could allow local attackers with hypervisor access to compromise SEV-SNP guest memory integrity. The second, CVE-2026-81010, involves the io_uring subsystem, which may lead to denial of service through improper handling of canceled tasks. Both vulnerabilities impact multiple architectures including ARM, MIPS, PowerPC, RISC-V, S390, and x86. The updates address flaws across numerous subsystems, including drivers for network, storage, and graphics. Users are advised to apply the patches immediately to mitigate potential risks. The CVSS scores for the vulnerabilities indicate a medium severity for CVE-2023-20585 and a severity for CVE-2026-81010.

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Timeline

2026-04-16
CVE-2023-20585 published
Vulnerability assigned a CVE identifier and published in the National Vulnerability Database.
MITRE

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Common questions

What systems are affected by these vulnerabilities?
The vulnerabilities affect various architectures including ARM, MIPS, PowerPC, RISC-V, S390, and x86.
What should I do to protect my systems?
Apply the latest patches released by Ubuntu for the Linux kernel vulnerabilities immediately.
What are the CVSS scores for the vulnerabilities?
CVE-2023-20585 has a CVSS score of 5.6 (medium), while CVE-2026-81010 is rated critical with a CVSS score of 9.8.