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Oracle Linux: CVE-2023-4155: ELSA-2023-7077: kernel security, bug fix, and enhancement update (IMPORTANT) (Multiple Advisories)

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Oracle Linux: CVE-2023-4155: ELSA-2023-7077:kernel security, bug fix, and enhancement update (IMPORTANT) (Multiple Advisories)

Severity
4
CVSS
(AV:L/AC:H/Au:M/C:N/I:N/A:C)
Published
08/04/2023
Created
11/18/2023
Added
11/16/2023
Modified
01/07/2025

Description

A flaw was found in KVM AMD Secure Encrypted Virtualization (SEV) in the Linux kernel. A KVM guest using SEV-ES or SEV-SNP with multiple vCPUs can trigger a double fetch race condition vulnerability and invoke the `VMGEXIT` handler recursively. If an attacker manages to call the handler multiple times, they can trigger a stack overflow and cause a denial of service or potentially guest-to-host escape in kernel configurations without stack guard pages (`CONFIG_VMAP_STACK`).

Solution(s)

  • oracle-linux-upgrade-kernel

References

  • https://attackerkb.com/topics/cve-2023-4155
  • CVE - 2023-4155
  • ELSA-2023-7077
  • ELSA-2023-6583
  • 查看数 706
  • 已创建
  • 最后回复

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