CVE-2011-3581

Heap-based buffer overflow in the ldns_rr_new_frm_str_internal function in ldns before 1.6.11 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a Resource Record (RR) with an unknown type containing input that is longer than a specified length.

Published: 2011-11-04 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-3581 is rated Moderate Risk (58.5/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 4.11%). 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-2011-3581

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 2026-06-19 4.16% 4.11% -0.05%
2 2026-06-15 5.21% 4.16% -1.05%
3 2026-05-06 — 5.21% —

Full EPSS history (13 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-3581

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/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:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 6.4 [email protected]

Weakness enumeration for CVE-2011-3581

OS Trackers for CVE-2011-3581

vendor priority summary link
debian not yet assigned CVE-2011-3581 not yet assigned priority: Debian including 1 source packages (ldns), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2011-3581
gentoo normal CVE-2011-3581: 1 GLSA(s) (201401-25), 1 atom(s) (net-libs/ldns); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2011-3581
suse medium CVE-2011-3581 severity moderate: SUSE including 13 source package names (ldns-1.6.17-5.7, ldns-1.8.4-160000.2.3, …), 16 product×package rows across 6 product lines (SUSE Linux Enterprise Module for Basesystem 15, SUSE Linux Enterprise Module for Basesystem 15 SP1, … (6 product lines)): Fixed 16. https://www.suse.com/security/cve/CVE-2011-3581/
ubuntu medium CVE-2011-3581 medium priority: Ubuntu including 1 source packages (ldns), 11 status rows across 11 suites (hardy, lucid, maverick, natty, oneiric, precise, quantal, raring, saucy, trusty, upstream): ignored 6, not-affected 3, DNE 1, released 1. https://ubuntu.com/security/CVE-2011-3581

Affected software / configurations for CVE-2011-3581

Vendor Product Version Raw CPE
nlnetlabs ldns <= 1.6.10 cpe:2.3:a:nlnetlabs:ldns:*:*:*:*:*:*:*:*
nlnetlabs ldns 0.50 cpe:2.3:a:nlnetlabs:ldns:0.50:*:*:*:*:*:*:*
nlnetlabs ldns 0.60 cpe:2.3:a:nlnetlabs:ldns:0.60:*:*:*:*:*:*:*
nlnetlabs ldns 0.65 cpe:2.3:a:nlnetlabs:ldns:0.65:*:*:*:*:*:*:*
nlnetlabs ldns 0.66 cpe:2.3:a:nlnetlabs:ldns:0.66:*:*:*:*:*:*:*
nlnetlabs ldns 0.70 cpe:2.3:a:nlnetlabs:ldns:0.70:*:*:*:*:*:*:*
nlnetlabs ldns 1.0.0 cpe:2.3:a:nlnetlabs:ldns:1.0.0:*:*:*:*:*:*:*
nlnetlabs ldns 1.1.0 cpe:2.3:a:nlnetlabs:ldns:1.1.0:*:*:*:*:*:*:*
nlnetlabs ldns 1.2.0 cpe:2.3:a:nlnetlabs:ldns:1.2.0:*:*:*:*:*:*:*
nlnetlabs ldns 1.2.1 cpe:2.3:a:nlnetlabs:ldns:1.2.1:*:*:*:*:*:*:*
nlnetlabs ldns 1.2.2 cpe:2.3:a:nlnetlabs:ldns:1.2.2:*:*:*:*:*:*:*
nlnetlabs ldns 1.3 cpe:2.3:a:nlnetlabs:ldns:1.3:*:*:*:*:*:*:*
nlnetlabs ldns 1.4.0 cpe:2.3:a:nlnetlabs:ldns:1.4.0:*:*:*:*:*:*:*
nlnetlabs ldns 1.4.1 cpe:2.3:a:nlnetlabs:ldns:1.4.1:*:*:*:*:*:*:*
nlnetlabs ldns 1.5.0 cpe:2.3:a:nlnetlabs:ldns:1.5.0:*:*:*:*:*:*:*
nlnetlabs ldns 1.5.1 cpe:2.3:a:nlnetlabs:ldns:1.5.1:*:*:*:*:*:*:*
nlnetlabs ldns 1.6.0 cpe:2.3:a:nlnetlabs:ldns:1.6.0:*:*:*:*:*:*:*
nlnetlabs ldns 1.6.1 cpe:2.3:a:nlnetlabs:ldns:1.6.1:*:*:*:*:*:*:*
nlnetlabs ldns 1.6.2 cpe:2.3:a:nlnetlabs:ldns:1.6.2:*:*:*:*:*:*:*
nlnetlabs ldns 1.6.3 cpe:2.3:a:nlnetlabs:ldns:1.6.3:*:*:*:*:*:*:*
nlnetlabs ldns 1.6.4 cpe:2.3:a:nlnetlabs:ldns:1.6.4:*:*:*:*:*:*:*
nlnetlabs ldns 1.6.5 cpe:2.3:a:nlnetlabs:ldns:1.6.5:*:*:*:*:*:*:*
nlnetlabs ldns 1.6.6 cpe:2.3:a:nlnetlabs:ldns:1.6.6:*:*:*:*:*:*:*
nlnetlabs ldns 1.6.7 cpe:2.3:a:nlnetlabs:ldns:1.6.7:*:*:*:*:*:*:*
nlnetlabs ldns 1.6.8 cpe:2.3:a:nlnetlabs:ldns:1.6.8:*:*:*:*:*:*:*
nlnetlabs ldns 1.6.9 cpe:2.3:a:nlnetlabs:ldns:1.6.9:*:*:*:*:*:*:*

References for CVE-2011-3581

cvelogic Threat Intelligence