What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-08-05 · updated 2026-06-17
• Weakness: CWE-295

Description

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.

Affected products

• Red Hat Enterprise Linux 10: all versions
• Red Hat Enterprise Linux 8: all versions — fixed in 8100020240905091210.489197e6
• Red Hat Enterprise Linux 8 Advanced Virtualization: all versions
• Red Hat Enterprise Linux 9: all versions — fixed in 0:1.18.1-4.el9_4

How to fix

Upgrade to a fixed version: Red Hat Enterprise Linux 8 8100020240905091210.489197e6; Red Hat Enterprise Linux 9 0:1.18.1-4.el9_4. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/errata/RHSA-2024:6757
• https://access.redhat.com/errata/RHSA-2024:6964
• https://access.redhat.com/security/cve/CVE-2024-7383
• https://bugzilla.redhat.com/show_bug.cgi?id=2302865
• https://lists.libguestfs.org/archives/list/guestfs@lists.libguestfs.org/message/LHR3BW6RJ7K4BJBQIYV3GTZLSY27VZO2
• https://lists.libguestfs.org/archives/list/guestfs@lists.libguestfs.org/thread/ENZY4LHLARA3N4C3JUNLPYUCXHFO7BWQ/

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