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Vulnerabilities CVE-2023-53769

CVE-2023-53769

Critical
Open
TLP:CLEAR

virt/coco/sev-guest: Double-buffer messages

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Description

In the Linux kernel, the following vulnerability has been resolved: virt/coco/sev-guest: Double-buffer messages The encryption algorithms read and write directly to shared unencrypted memory, which may leak information as well as permit the host to tamper with the message integrity. Instead, copy whole messages in or out as needed before doing any computation on them.

Details

CVSS Score
9.3
EPSS Score
0.10%

0.9th percentile

CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Confidence
90%
Published
Dec 8, 2025
Last Modified
Aug 5, 2026
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