CVE-2024-7383: Libnbd: nbd server improper certificate validation
Vulnerability summary
CVE-2024-7383 is a high (CVSS 7.4) Improper Certificate Validation vulnerability in libnbd. EPSS estimates a 0.39% chance of exploitation in the next 30 days, higher than 33.2% of scored vulnerabilities.
Severe, CVSS 7.4 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 0% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 1Timeline
- 05-08-2024PublishedVulnerability first disclosed.
- 25-02-2026Last modifiedVulnerability information updated.
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.
CVSS metrics
5 scores · 5 sources · 1 version- OSV · Red hatEcosystem advisory · calculated7.4HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- OSV · UbuntuEcosystem advisory · calculated7.4HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- OSV · DebianEcosystem advisory · calculated7.4HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- NVDNIST7.4HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS trend
Probability
0.39%
Chance of exploitation in the next 30 days
Percentile
33%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.39% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Redhat12 products
- libnbd< 0:1.18.1-4.el9_4
- libnbd-bash-completion< 0:1.18.1-4.el9_4
- libnbd-debuginfo< 0:1.18.1-4.el9_4
- libnbd-debugsource< 0:1.18.1-4.el9_4
- libnbd-devel< 0:1.18.1-4.el9_4
Opensuse3 products
- libnbd&distro=openSUSE Leap 15.5< 1.18.5-150300.8.21.1
- libnbd&distro=openSUSE Leap 15.6< 1.18.5-150600.18.3.1
- libnbd&distro=openSUSE Tumbleweed< 1.20.2-1.1
Debian1 product
- libnbdAll versions (No fix recorded) | < 1.20.2-1
Suse1 product
- libnbd&distro=SUSE Linux Enterprise Module for Server Applications 15 SP6< 1.18.5-150600.18.3.1
Ubuntu1 product
- libnbdAll versions (No fix recorded)
5 vendors · 18 products
