CVE-2023-5871

Name: CVE-2023-5871
Creator: NVD / NIST
Published: 2023-11-27T12:15:07.94+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.92%

Last modified Jun 17, 2026

CVE-2023-5871 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. A flaw was found in libnbd, due to a malicious Network Block Device (NBD), a protocol for accessing Block Devices such as hard disks over a Network. This issue may allow a malicious NBD server to cause a Denial of Service.. EPSS estimates a 0.92% chance of exploitation in the next 30 days.

Description

A flaw was found in libnbd, due to a malicious Network Block Device (NBD), a protocol for accessing Block Devices such as hard disks over a Network. This issue may allow a malicious NBD server to cause a Denial of Service.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

0.92%

55.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Redhat	Libnbd	>= 1.17.4, < 1.18.2
Redhat	Libnbd	1.19.1
Redhat	Enterprise Linux	9.0

References

https://access.redhat.com/errata/RHSA-2024:2204
https://access.redhat.com/security/cve/CVE-2023-5871Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2247308Issue Tracking, Vendor Advisory
https://lists.libguestfs.org/archives/list/guestfs@lists.libguestfs.org/thread/PFVUCMPFQUDC23JXSCUUPXIGDZ7XCFMD/Mailing List, Patch
https://access.redhat.com/errata/RHSA-2024:2204
https://access.redhat.com/security/cve/CVE-2023-5871Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2247308Issue Tracking, Vendor Advisory
https://lists.libguestfs.org/archives/list/guestfs@lists.libguestfs.org/thread/PFVUCMPFQUDC23JXSCUUPXIGDZ7XCFMD/Mailing List, Patch

Timeline

Published: Nov 27, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-5871?

How severe is CVE-2023-5871?

CVE-2023-5871 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.92% probability of exploitation in the next 30 days.

How do I fix CVE-2023-5871?

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.

Are you affected by CVE-2023-5871?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST