What is CVE-2023-53769?

CVE-2023-53769 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.3 out of 10, affecting Linux kernel versions from 5.19 onward and patched in 6.1.28, 6.2.15, 6.3.2 and others. CVE-2023-53769 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-53769?

CVE-2023-53769 has a CVSS score of 9.3 out of 10, rated Critical severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

Is there a patch available for CVE-2023-53769?

Yes, CVE-2023-53769 has been patched. Fixed versions include 6.1.28, 6.2.15, 6.3.2 and others. If you are running Linux kernel 5.19 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-53769 actively exploited?

CVE-2023-53769 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2023-53769

Critical

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.

Package Linux Kernel

Published 2025-12-08

Last modified 2026-08-04

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

9.3

out of 10

Critical

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected versions

Linux kernel versions 5.19 and later are affected. Fixed in 6.1.28, 6.2.15, 6.3.2, 6.4 and their respective stable series.

Affected from

≥ 5.19

Fixed in

✓ 6.1.28 6.1.x ✓ 6.2.15 6.2.x ✓ 6.3.2 6.3.x ✓ 6.4

References

4 total

Details

CVE ID CVE-2023-53769

Severity Critical

CVSS score 9.3 / 10

CVSS version 3.1

Published 2025-12-08

Modified 2026-08-04

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2023-53769?

CVE-2023-53769 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.3 out of 10 . It affects Linux kernel versions from 5.19 onward and has been patched in 6.1.28, 6.2.15, 6.3.2 and others. CVE-2023-53769 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-53769?

CVE-2023-53769 has a CVSS score of 9.3 out of 10, rated Critical severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
Is there a patch available for CVE-2023-53769?

Yes. CVE-2023-53769 has been patched. Fixed versions include 6.1.28, 6.2.15, 6.3.2 and others. If you are running Linux kernel 5.19 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-53769 actively exploited?

No. CVE-2023-53769 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.