Vulnerability in Linux

CVE-2023-53769

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.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.001 (0.8th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 0.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2023-53769: held from 0.001 to 0.001.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000

Affected products

  • Linux — versions d5af44dde5461d125d1602ac913ab5c6bdf09b8b, 5.19, 0

References

Frequently asked questions

What is CVE-2023-53769?
CVE-2023-53769 is a critical-severity vulnerability in Linux. CVSS score: 9.3/10. Published 2025-12-08.
How severe is CVE-2023-53769?
Critical severity. CVSS v3 base score is 9.3 out of 10.