What is CVE-2014-5271?

CVE-2014-5271 is a vulnerability in Ffmpeg, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. Published 2014-11-03.

Is CVE-2014-5271 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Ffmpeg

CVE-2014-5271

Heap-based buffer overflow in the encode_slice function in libavcodec/proresenc_kostya.c in FFMpeg before 1.1.14, 1.2.x before 1.2.8, 2.x before 2.2.7, and 2.3.x before 2.3.3 and Libav before 10.5 allows remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via unspecified vectors.

Vulnerability class: Buffer Overflow

Published 2014-11-03 · last modified 2026-06-17.

CVSS v2 metric

CVSS v2 base score 7.5 (High). Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.047 (91.5th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 91.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.047 · newest: 0.047 · change: +0.000

Affected products

Ffmpeg — versions 1.1, 1.1.1, 1.1.2
Libav — versions 0.5, 0.5.1, 0.5.2

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

www.osvdb.org/111725 (vdb-entry)
www.securityfocus.com/bid/69250 (vdb-entry)
git.videolan.org/
security.gentoo.org/glsa/201603-06 (vendor-advisory)
www.ffmpeg.org/security.html

Frequently asked questions

What is CVE-2014-5271?: CVE-2014-5271 is a vulnerability in Ffmpeg, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. Published 2014-11-03.
Is CVE-2014-5271 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.