CVE-2011-0530

7.5 HIGH 5% exploit odds Fix listed Memory safety Server

What it is

Buffer overflow in the mainloop function in nbd-server.c in the server in Network Block Device (nbd) before 2.9.20 might allow remote attackers to execute arbitrary code via a long request. NOTE: this issue exists because of a CVE-2005-3534 regression.

At a glance

Exploitability: Can be exploited over the network without logging in. Limited direct impact.
Exploit odds: 5.3% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2011-02-22 19:00 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 23:27 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 5.3% in the next 30 days (EPSS).
Severity: 7.5 HIGH (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2011-02-22 19:00 UTC
Last modified: 2026-06-16 23:27 UTC
Exploit probability: 5.3% · EPSS, next 30 days
Weakness: CWE-119 · Buffer errors
Record status: Modified

Affected

Wouter Verhelst Nbd ≤ 2.9.19
Wouter Verhelst Nbd 2.9.0
Wouter Verhelst Nbd 2.9.1
Wouter Verhelst Nbd 2.9.2
Wouter Verhelst Nbd 2.9.3
Wouter Verhelst Nbd 2.9.4
Wouter Verhelst Nbd 2.9.5
Wouter Verhelst Nbd 2.9.6

Attack profile CVSS 2.0 · 7.5

Attack vector: Network
Complexity: Low
Authentication: None
Confidentiality: Partial
Integrity: Partial
Availability: Partial

Raw vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

Is it in your code?

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Fix and advisories

References

NVD record · CVE.org record