nbd-server.c in Network Block Device (nbd-server) 2.9.21 allows remote attackers to cause…
Priority LOW 28Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
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.
Why it matters now
EPSS 0.02524 84th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:wouter_verhelst:nbd:*:*:*:*:*:*:*:* | up to 2.9.21 | Vulnerable | Wouter Verhelst |
- cpe:2.3:a:wouter_verhelst:nbd:*:*:*:*:*:*:*:* Versions up to 2.9.21 Vulnerable ·Wouter Verhelst
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2011-1925
- 2026-10-03 Alias added: GHSA-4c65-9qmh-v9h5
References
More Wouter Verhelst Nbd vulnerabilities
- TI-2005-03357 Buffer overflow in the Network Block Device (nbd) server 2.7.5 and earlier, and 2.8.0… CVSS 2.0HIGH 7.5
- TI-2011-00457 Buffer overflow in the mainloop function in nbd-server.c in the server in Network Block… CVSS 2.0HIGH 7.5
- TI-2015-00788 nbd-server.c in Network Block Device (nbd-server) before 3.11 does not properly handle… CVSS 2.0HIGH 7.8
- TI-2013-06093 The modern style negotiation in Network Block Device (nbd-server) 2.9.22 through 3.3… CVSS 2.0HIGH 7.8
- TI-2013-05364 nbd-server in Network Block Device (nbd) before 3.5 does not properly check IP addresses… CVSS 2.0HIGH 7.5
Sources
- CVE-2011-1925 · CVE Program
- CVE-2011-1925 · NVD
- FIRST EPSS
- GHSA-4c65-9qmh-v9h5 · GitHub Advisory Database · CC BY 4.0
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