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TI-2023-05406 Aliases CVE-2023-5871GHSA-m8ch-v4g3-cq3g

Libnbd: malicious nbd server may crash libnbd

Priority LOW 26CWE-617Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-617.

Summary

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.

Why it matters now

EPSS 0.01108 66th percentileScored 2026-11-07
Fix Fixed Red Hat: 1 advisory

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
Red HatRed Hat Enterprise Linux 9—1.18.1-3.el9Patch availableCNA
Red HatRed Hat Enterprise Linux 6——Not affectedCNA
Red HatRed Hat Enterprise Linux 7——Not affectedCNA
Red HatRed Hat Enterprise Linux 8——Not affectedCNA
  • Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 1.18.1-3.el9 Patch available CNA
  • Red Hat Enterprise Linux 6 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat Enterprise Linux 7 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in — Not affected CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:redhat:libnbd:*:*:*:*:*:*:*:*1.17.4 to before 1.18.2VulnerableRed Hat
cpe:2.3:a:redhat:libnbd:1.19.1:*:*:*:*:*:*:*1.19.1VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*9.0VulnerableRed Hat
  • cpe:2.3:a:redhat:libnbd:*:*:*:*:*:*:*:* Versions 1.17.4 to before 1.18.2 Vulnerable ·Red Hat
  • cpe:2.3:a:redhat:libnbd:1.19.1:*:*:*:*:*:*:* Versions 1.19.1 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Red Hat

Remediation

Red Hat 1 advisory

  • RHSA-2024:2204 Released 2024-04-30 · Red Hat rating Moderate
    libnbd security update
    • Red Hat Enterprise Linux AppStream (v. 9) libnbd-1.18.1-3.el9, libnbd-bash-completion-1.18.1-3.el9, nbdfuse-1.18.1-3.el9 +1
    • Red Hat Enterprise Linux CRB (v. 9) libnbd-devel-1.18.1-3.el9, ocaml-libnbd-1.18.1-3.el9, ocaml-libnbd-devel-1.18.1-3.el9

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2024:2204
Red Hat Enterprise Linux CRB (v. 9)Fixed RHSA-2024:2204
Not affected: 3 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-5871
  2. 2026-10-03 Alias added: GHSA-m8ch-v4g3-cq3g

References

Patch 1

Advisory 3

  • TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-10530 Code injection in [UNKNOWN] RichFaces KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05975 GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed… KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05157 GNU Bash through 4.3 processes trailing strings after function definitions in the values… KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-23530 Sudo before 1.9.17p1 allows local users to obtain root access because /etc/nsswitch.conf… KEVCVSS 3.1CRITICAL 9.3
  • TI-2021-17490 mod_proxy SSRF KEVCVSS 3.1CRITICAL 9.0
See all 1955 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences