# CVE-2024-7383: Libnbd: nbd server improper certificate validation

Status: published. Published: 2024-08-05. Updated: 2026-11-05.

A flaw was found in libnbd. The client did not always correctly verify the NBD server's certificate when using TLS to connect to an NBD server. This issue allows a man-in-the-middle attack on NBD traffic.

## Remediation

No remediation reported in collected sources

## Affected products and versions

-  /  (libnbd): ≥ 1.18.0; < 1.18.5 (affected, semver); ≥ 1.20.0; < 1.20.2 (affected, semver). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (virt-devel:rhel): ≥ 8100020240905091210.489197e6; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (virt:rhel): ≥ 8100020240905091210.489197e6; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (libnbd): ≥ 0:1.18.1-4.el9_4; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 10 (libnbd): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 Advanced Virtualization (virt:av/libnbd): Version range not reported. Source: CNA: redhat

## Severity and prioritization

- CVSS 3.1: 7.4 (high); CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N; source: CNA: redhat

- CISA KEV: No listing in collected sources

- EPSS: 0.39% as of 2026-11-05; percentile 33.33%

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-295

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://access.redhat.com/errata/RHSA-2024:6757 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2024:6964 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/security/cve/CVE-2024-7383 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2302865 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

- https://lists.libguestfs.org/archives/list/guestfs@lists.libguestfs.org/message/LHR3BW6RJ7K4BJBQIYV3GTZLSY27VZO2 (CNA: redhat)

- https://lists.libguestfs.org/archives/list/guestfs@lists.libguestfs.org/thread/ENZY4LHLARA3N4C3JUNLPYUCXHFO7BWQ/ (CNA: redhat)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2024-7383; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2024-7383; retrieved 2026-11-05; source updated Not reported

Revision: 33562d3c87b08c50449bb76e5e07b4528fb767ac1f55269096c23c178e8759c2

Canonical: https://y2.dev/cve/CVE-2024-7383

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