Vulnerability record · CVE-2011-1922 · published 31 May 2011

CVE-2011-1922: Nlnetlabs unbound vulnerability

Nlnetlabs · Unbound

daemon/worker.c in Unbound 1.x before 1.4.10, when debugging functionality and the interface-automatic option are enabled, allows remote attackers to cause a denial of service (assertion failure and daemon exit) via a crafted DNS request that triggers improper error handling.

4.3 CVSS 2.0 Medium EPSS 7.1% · top 6.0% CWE-399 · CWE-399

4.3CVSS 2.0 base score

7.1%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

14References

16 Jun 2026Last modified by NVD

Description

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Unbound Nlnetlabs

References

Link	Tags
http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061243.html
http://osvdb.org/72750
http://secunia.com/advisories/44865
http://unbound.nlnetlabs.nl/downloads/CVE-2011-1922.txt	PatchVendor Advisory
http://www.kb.cert.org/vuls/id/531342	PatchUS Government Resource
http://www.securityfocus.com/bid/47986
https://exchange.xforce.ibmcloud.com/vulnerabilities/67645
http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061243.html
http://osvdb.org/72750
http://secunia.com/advisories/44865
http://unbound.nlnetlabs.nl/downloads/CVE-2011-1922.txt	PatchVendor Advisory
http://www.kb.cert.org/vuls/id/531342	PatchUS Government Resource
http://www.securityfocus.com/bid/47986
https://exchange.xforce.ibmcloud.com/vulnerabilities/67645

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2019-25032Nlnetlabs unbound integer overflow vulnerabilityUnbound before 1.9.5 allows an integer overflow in the regional allocator via regional_alloc. NOTE: The vendor disputes that this is a vulnerability.…EPSS 2.2%27 Apr 2021 9.8CVE-2019-25033Nlnetlabs unbound integer overflow vulnerabilityUnbound before 1.9.5 allows an integer overflow in the regional allocator via the ALIGN_UP macro. NOTE: The vendor disputes that this is a vulnerabil…EPSS 1.8%27 Apr 2021 9.8CVE-2019-25034Nlnetlabs unbound integer overflow vulnerabilityUnbound before 1.9.5 allows an integer overflow in sldns_str2wire_dname_buf_origin, leading to an out-of-bounds write. NOTE: The vendor disputes that…EPSS 2.0%27 Apr 2021 9.8CVE-2019-25035Nlnetlabs unbound out-of-bounds write vulnerabilityUnbound before 1.9.5 allows an out-of-bounds write in sldns_bget_token_par. NOTE: The vendor disputes that this is a vulnerability. Although the code…EPSS 2.0%27 Apr 2021 9.8CVE-2019-25038Nlnetlabs unbound integer overflow vulnerabilityUnbound before 1.9.5 allows an integer overflow in a size calculation in dnscrypt/dnscrypt.c. NOTE: The vendor disputes that this is a vulnerability.…EPSS 2.0%27 Apr 2021 9.8CVE-2019-25039Nlnetlabs unbound integer overflow vulnerabilityUnbound before 1.9.5 allows an integer overflow in a size calculation in respip/respip.c. NOTE: The vendor disputes that this is a vulnerability. Alt…EPSS 2.0%27 Apr 2021 9.8CVE-2019-25042Nlnetlabs unbound out-of-bounds write vulnerabilityUnbound before 1.9.5 allows an out-of-bounds write via a compressed name in rdata_copy. NOTE: The vendor disputes that this is a vulnerability. Altho…EPSS 2.0%27 Apr 2021 9.1CVE-2026-81642Nlnetlabs unbound heap-based buffer overflow vulnerabilityIn NLnet Labs Unbound up to and including 1.26.0, a vulnerability was found in the DNSSEC validator that enables denial of service and possible remot…EPSS 0.96%16 Sep 2026

Source: NIST National Vulnerability Database (record CVE-2011-1922), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.