CVE-2019-14851

A denial of service vulnerability was discovered in nbdkit. A client issuing a certain sequence of commands could possibly trigger an assertion failure, causing nbdkit to exit. This issue only affected nbdkit versions 1.12.7, 1.14.1, and 1.15.1.

Published: 2021-03-18 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-14851 is rated Moderate Risk (46.9/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.99%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2019-14851

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.33% 0.99% +0.66%
2 2025-03-30 1.13% 0.33% -0.80%
3 2025-03-29 — 1.13% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-14851

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 3.6 [email protected]
3.5 2.0 LOW
AV:N/AC:M/Au:S/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 6.8 2.9 [email protected]

Weakness enumeration for CVE-2019-14851

OS Trackers for CVE-2019-14851

vendor priority summary link
debian not yet assigned CVE-2019-14851 not yet assigned priority: Debian including 1 source packages (nbdkit), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2019-14851
redhat medium — https://access.redhat.com/security/cve/CVE-2019-14851
ubuntu medium CVE-2019-14851 medium priority: Ubuntu including 1 source packages (nbdkit), 18 status rows across 18 suites (bionic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 12, DNE 2, ignored 2, needed 1, released 1. https://ubuntu.com/security/CVE-2019-14851

Affected software / configurations for CVE-2019-14851

Vendor Product Version Raw CPE
nbdkit_project nbdkit < 1.12.7 cpe:2.3:a:nbdkit_project:nbdkit:*:*:*:*:*:*:*:*
nbdkit_project nbdkit >= 1.14.0, < 1.14.1 cpe:2.3:a:nbdkit_project:nbdkit:*:*:*:*:*:*:*:*
nbdkit_project nbdkit >= 1.15.0, < 1.15.1 cpe:2.3:a:nbdkit_project:nbdkit:*:*:*:*:*:*:*:*

References for CVE-2019-14851

URL Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1757259 Issue Tracking Patch Third Party Advisory
https://www.redhat.com/archives/libguestfs/2019-September/msg00272.html Mailing List Patch Vendor Advisory
cvelogic Threat Intelligence