CVE-2014-6272

Multiple integer overflows in the evbuffer API in Libevent 1.4.x before 1.4.15, 2.0.x before 2.0.22, and 2.1.x before 2.1.5-beta allow context-dependent attackers to cause a denial of service or possibly have other unspecified impact via "insanely large inputs" to the (1) evbuffer_add, (2) evbuffer_expand, or (3) bufferevent_write function, which triggers a heap-based buffer overflow or an infinite loop. NOTE: this identifier has been SPLIT per ADT3 due to different affected versions. See CVE-2015-6525 for the functions that are only affected in 2.0 and later.

Published: 2015-08-24 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2014-6272 is rated Moderate Risk (57.5/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.08%). 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-2014-6272

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 2025-07-13 0.51% 1.08% +0.57%
2 2025-06-14 1.08% 0.51% -0.57%
3 2025-03-30 — 1.08% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2014-6272

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/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:L)
Exploitation conditions are straightforward and predictable.
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.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2014-6272

OS Trackers for CVE-2014-6272

vendor priority summary link
debian not yet assigned CVE-2014-6272 not yet assigned priority: Debian including 1 source packages (libevent), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2014-6272
gentoo normal CVE-2014-6272: 1 GLSA(s) (201502-07), 1 atom(s) (dev-libs/libevent); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2014-6272
redhat medium — https://access.redhat.com/security/cve/CVE-2014-6272
suse low CVE-2014-6272 severity low: SUSE including 254 source package names (amazon/suse-sles-15-sp1-chost-byos-v20210304-hvm-ssd-x86_64, amazon/suse-sles-15-sp1-chost-byos-v20220127-hvm-ssd-x86_64, …), 327 product×package rows across 65 product lines (HPE Helion OpenStack 8, SUSE Linux Enterprise Desktop 11 SP3, … (65 product lines)): Known Affected 157, Fixed 139, Known Not Affected 31. https://www.suse.com/security/cve/CVE-2014-6272/
ubuntu medium CVE-2014-6272 medium priority: Ubuntu including 1 source packages (libevent), 5 status rows across 5 suites (lucid, precise, trusty, upstream, utopic): released 5. https://ubuntu.com/security/CVE-2014-6272

Affected software / configurations for CVE-2014-6272

Vendor Product Version Raw CPE
debian debian_linux 7.0 cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
libevent_project libevent 1.4.0 cpe:2.3:a:libevent_project:libevent:1.4.0:*:*:*:*:*:*:*
libevent_project libevent 1.4.1 cpe:2.3:a:libevent_project:libevent:1.4.1:*:*:*:*:*:*:*
libevent_project libevent 1.4.2 cpe:2.3:a:libevent_project:libevent:1.4.2:*:*:*:*:*:*:*
libevent_project libevent 1.4.3 cpe:2.3:a:libevent_project:libevent:1.4.3:*:*:*:*:*:*:*
libevent_project libevent 1.4.4 cpe:2.3:a:libevent_project:libevent:1.4.4:*:*:*:*:*:*:*
libevent_project libevent 1.4.5 cpe:2.3:a:libevent_project:libevent:1.4.5:*:*:*:*:*:*:*
libevent_project libevent 1.4.6 cpe:2.3:a:libevent_project:libevent:1.4.6:*:*:*:*:*:*:*
libevent_project libevent 1.4.7 cpe:2.3:a:libevent_project:libevent:1.4.7:*:*:*:*:*:*:*
libevent_project libevent 1.4.8 cpe:2.3:a:libevent_project:libevent:1.4.8:*:*:*:*:*:*:*
libevent_project libevent 1.4.9 cpe:2.3:a:libevent_project:libevent:1.4.9:*:*:*:*:*:*:*
libevent_project libevent 1.4.10 cpe:2.3:a:libevent_project:libevent:1.4.10:*:*:*:*:*:*:*
libevent_project libevent 1.4.11 cpe:2.3:a:libevent_project:libevent:1.4.11:*:*:*:*:*:*:*
libevent_project libevent 1.4.12 cpe:2.3:a:libevent_project:libevent:1.4.12:*:*:*:*:*:*:*
libevent_project libevent 1.4.13 cpe:2.3:a:libevent_project:libevent:1.4.13:*:*:*:*:*:*:*
libevent_project libevent 1.4.14 cpe:2.3:a:libevent_project:libevent:1.4.14:*:*:*:*:*:*:*
libevent_project libevent 2.0.1 cpe:2.3:a:libevent_project:libevent:2.0.1:*:*:*:*:*:*:*
libevent_project libevent 2.0.2 cpe:2.3:a:libevent_project:libevent:2.0.2:*:*:*:*:*:*:*
libevent_project libevent 2.0.3 cpe:2.3:a:libevent_project:libevent:2.0.3:*:*:*:*:*:*:*
libevent_project libevent 2.0.4 cpe:2.3:a:libevent_project:libevent:2.0.4:*:*:*:*:*:*:*
libevent_project libevent 2.0.5 cpe:2.3:a:libevent_project:libevent:2.0.5:*:*:*:*:*:*:*
libevent_project libevent 2.0.6 cpe:2.3:a:libevent_project:libevent:2.0.6:*:*:*:*:*:*:*
libevent_project libevent 2.0.7 cpe:2.3:a:libevent_project:libevent:2.0.7:*:*:*:*:*:*:*
libevent_project libevent 2.0.8 cpe:2.3:a:libevent_project:libevent:2.0.8:*:*:*:*:*:*:*
libevent_project libevent 2.0.9 cpe:2.3:a:libevent_project:libevent:2.0.9:*:*:*:*:*:*:*
libevent_project libevent 2.0.10 cpe:2.3:a:libevent_project:libevent:2.0.10:*:*:*:*:*:*:*
libevent_project libevent 2.0.11 cpe:2.3:a:libevent_project:libevent:2.0.11:*:*:*:*:*:*:*
libevent_project libevent 2.0.12 cpe:2.3:a:libevent_project:libevent:2.0.12:*:*:*:*:*:*:*
libevent_project libevent 2.0.13 cpe:2.3:a:libevent_project:libevent:2.0.13:*:*:*:*:*:*:*
libevent_project libevent 2.0.14 cpe:2.3:a:libevent_project:libevent:2.0.14:*:*:*:*:*:*:*
libevent_project libevent 2.0.15 cpe:2.3:a:libevent_project:libevent:2.0.15:*:*:*:*:*:*:*
libevent_project libevent 2.0.16 cpe:2.3:a:libevent_project:libevent:2.0.16:*:*:*:*:*:*:*
libevent_project libevent 2.0.17 cpe:2.3:a:libevent_project:libevent:2.0.17:*:*:*:*:*:*:*
libevent_project libevent 2.0.18 cpe:2.3:a:libevent_project:libevent:2.0.18:*:*:*:*:*:*:*
libevent_project libevent 2.0.19 cpe:2.3:a:libevent_project:libevent:2.0.19:*:*:*:*:*:*:*
libevent_project libevent 2.0.20 cpe:2.3:a:libevent_project:libevent:2.0.20:*:*:*:*:*:*:*
libevent_project libevent 2.0.21 cpe:2.3:a:libevent_project:libevent:2.0.21:*:*:*:*:*:*:*
libevent_project libevent 2.1.1 cpe:2.3:a:libevent_project:libevent:2.1.1:*:*:*:*:*:*:*
libevent_project libevent 2.1.2 cpe:2.3:a:libevent_project:libevent:2.1.2:*:*:*:*:*:*:*
libevent_project libevent 2.1.3 cpe:2.3:a:libevent_project:libevent:2.1.3:*:*:*:*:*:*:*
libevent_project libevent 2.1.4 cpe:2.3:a:libevent_project:libevent:2.1.4:*:*:*:*:*:*:*

References for CVE-2014-6272

cvelogic Threat Intelligence