What is CVE-2016-5275?

CVE-2016-5275 is a high-severity vulnerability in Mozilla Firefox, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2016-09-22.

How severe is CVE-2016-5275?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Mozilla Firefox

CVE-2016-5275

Buffer overflow in the mozilla::gfx::FilterSupport::ComputeSourceNeededRegions function in Mozilla Firefox before 49.0 allows remote attackers to execute arbitrary code by leveraging improper interaction between empty filters and CANVAS element rendering.

Vulnerability class: Buffer Overflow

Published 2016-09-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.031 (87.4th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.031 · newest: 0.031 · change: 0.000

Affected products

Mozilla Firefox

Weakness classification (CWE)

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

References

www.mozilla.org/security/announce/2016/mfsa2016-85.html (Vendor Advisory)
www.securityfocus.com/bid/93052 (vdb-entry)
bugzilla.mozilla.org/show_bug.cgi (Issue Tracking)
security.gentoo.org/glsa/201701-15 (vendor-advisory)
www.securitytracker.com/id/1036852 (vdb-entry)

Frequently asked questions

What is CVE-2016-5275?: CVE-2016-5275 is a high-severity vulnerability in Mozilla Firefox, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2016-09-22.
How severe is CVE-2016-5275?: High severity. CVSS v3 base score is 8.8 out of 10.