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CVE-2023-53769

CRITICALCVSS 9.3/10EPSS 0.11%

Last modified

CVE-2023-53769 is a critical-severity vulnerability rated 9.3/10 on the CVSS scale. 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.. EPSS estimates a 0.11% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
9.3/10

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

EPSS Probability
0.11%

1.4th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= d5af44dde5461d125d1602ac913ab5c6bdf09b8b, < 577a64725bfd77645986168e953d405067ee565b; >= d5af44dde5461d125d1602ac913ab5c6bdf09b8b, < c27dafc4aa50a29ec927b3aa84ac7b430071f682; >= d5af44dde5461d125d1602ac913ab5c6bdf09b8b, < 4b69c63f716cfda38e1210e65b68f67f6cee2ddf; >= d5af44dde5461d125d1602ac913ab5c6bdf09b8b, < 965006103a14703cc42043bbf9b5e0cdf7a468ad
LinuxLinux5.19

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is 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.
How severe is CVE-2023-53769?
CVE-2023-53769 has a CVSS score of 9.3/10 (CRITICAL severity). The EPSS model estimates a 0.11% probability of exploitation in the next 30 days.
How do I fix CVE-2023-53769?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST