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Fencer Intel
high 7.5

CVE-2014-6272 json

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 cont…

published 11y ago modified 4mo ago also EUVD-2014-6158

cvss
7.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.1%
EPSS 2.1% chance of exploitation in 30 days, percentile 81%
public exploits
0
none known

Summary

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.

Patch / fix

  • libevent Debian 14, Debian 13, Debian 12 2.0.21-stable-2

debian advisories DEBIAN-CVE-2014-6272

  • libevent Ubuntu 14.04 LTS 2.0.21-stable-1ubuntu1.14.04.1

ubuntu advisories UBUNTU-CVE-2014-6272

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • dnscrypt-proxy openSUSE Tumbleweed 2.1.0-1.2

opensuse advisories openSUSE-SU-2024:10720-1

Is CVE-2014-6272 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2014-6272 updated cvss 5.1

libevent: potential heap overflow in buffer/bufferevent APIs

  • Red Hat Enterprise Linux 4 openmpi, nfs-utils Red Hat Enterprise Linux 5 firefox, libevent, thunderbird Red Hat Enterprise Linux 6 firefox, libevent, thunderbird, chromium-browser Red Hat Enterprise Linux 7 firefox, libevent, thunderbird
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux 5 openmpi Red Hat Enterprise Linux 6 openmpi Red Hat Enterprise Linux 7 openmpi, openmpi3, compat-openmpi16
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.08% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.