5.3

CVE-2023-5871: redhat enterprise_linux Reachable Assertion

CVSS: 5.3v3.1MediumModified
AliasesUBUNTU-CVE-2023-5871DEBIAN-CVE-2023-5871SUSE-SU-2023:4463-1
Published 27-11-2023Last modified 20-11-2025
Open JSON

Vulnerability summary

CVE-2023-5871 is a medium (CVSS 5.3) Reachable Assertion vulnerability in redhat enterprise_linux. EPSS estimates a 0.92% chance of exploitation in the next 30 days, higher than 59.7% of scored vulnerabilities.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.92%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1
RHSA-2024:2204

Timeline

  1. 27-11-2023
    PublishedVulnerability first disclosed.
  2. 20-11-2025
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.92%

Chance of exploitation in the next 30 days

Percentile

60%

Versus all other CVEs

30-day change

0.00 pp

From 0.92% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.92%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Opensuse3 products
  • libnbd&distro=openSUSE Leap 15.4< 1.18.1-150300.8.18.1
  • libnbd&distro=openSUSE Leap 15.5< 1.18.1-150300.8.18.1
  • libnbd&distro=openSUSE Tumbleweed< 1.18.1-2.1
Redhat2 products
Debian1 product
  • libnbd< 1.18.1-1
Ubuntu1 product
  • libnbdAll versions (No fix recorded)

4 vendors · 7 products

References

10 links