CVE-2011-1925

nbd-server.c in Network Block Device (nbd-server) 2.9.21 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) by causing a negotiation failure, as demonstrated by specifying a name for a non-existent export.

Published: 2011-05-31 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-1925 is rated Moderate Risk (47.1/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.38%). 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-2011-1925

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 2025-03-30 1.80% 1.38% -0.41%
2 2025-03-29 1.38% 1.80% +0.41%
3 2025-03-17 — 1.38% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-1925

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2011-1925

OS Trackers for CVE-2011-1925

vendor priority summary link
debian not yet assigned CVE-2011-1925 not yet assigned priority: Debian including 1 source packages (nbd), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2011-1925
gentoo high CVE-2011-1925: 1 GLSA(s) (201206-35), 1 atom(s) (sys-block/nbd); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2011-1925
ubuntu low CVE-2011-1925 low priority: Ubuntu including 1 source packages (nbd), 10 status rows across 10 suites (hardy, lucid, maverick, natty, oneiric, precise, quantal, raring, saucy, upstream): not-affected 7, ignored 2, released 1. https://ubuntu.com/security/CVE-2011-1925

NVD evaluator notes for CVE-2011-1925

Comment: Per: http://cwe.mitre.org/data/definitions/476.html 'CWE-476: NULL Pointer Dereference'

Affected software / configurations for CVE-2011-1925

Vendor Product Version Raw CPE
wouter_verhelst nbd <= 2.9.21 cpe:2.3:a:wouter_verhelst:nbd:*:*:*:*:*:*:*:*

References for CVE-2011-1925

cvelogic Threat Intelligence