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Vulnerabilities

Vulnerability · 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 unencryp

Published Dec 8, 2025 · catalog updated Aug 5, 2026 · Linux Linux

Last checked Nov 1, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2023-53769. EPSS is 0.10%. Act only if a listed version of Linux Linux is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Critical9.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.10%
Remediation
Version ranges on file
Affected products
vendor Linux Linux d5af44dde5461d125d1602ac913ab5c6bdf09b8b <577a64725bfd77645986168e953d405067ee565b

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Linux Linux d5af44dde5461d125d1602ac913ab5c6bdf09b8b <577a64725bfd77645986168e953d405067ee565bd5af44dde5461d125d1602ac913ab5c6bdf09b8b <577a64725bfd77645986168e953d405067ee565b

How to fix CVE-2023-53769

  • Upgrade

    CVE-2023-53769 lists a fix boundary at 577a64725bfd77645986168e953d405067ee565b. Compare the installed build with that boundary before you change production.

  • Version check

    Seen in d5af44dde5461d125d1602ac913ab5c6bdf09b8b <577a64725bfd77645986168e953d405067ee565b

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2023-53769. EPSS is 0.10%. Act only if a listed version of Linux Linux is installed.

Which versions are affected?

Compare what you have installed with Linux Linux d5af44dde5461d125d1602ac913ab5c6bdf09b8b <577a64725bfd77645986168e953d405067ee565b d5af44dde5461d125d1602ac913ab5c6bdf09b8b <577a64725bfd77645986168e953d405067ee565b. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.10%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 8, 2025 · EUVD

    Detected

    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.

  2. Aug 5, 2026 · EUVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2023-53769

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2023-53769

    30-day exploitation probability 0.10%

    first.org
  • EUVDVulnerability recordEUVD-2023-60059

    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 integri

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 1, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 1, 2026
  • CVE.orgOct 26, 2026
  • EUVDOct 26, 2026