CVE-2016-2811

HIGHNVD 8.88.8—

8.8

Use-after-free vulnerability in the ServiceWorkerInfo class in the Service Worker subsystem in Mozilla Firefox before 46.0 allows remote attackers to execute arbitrary code via vectors related to the BeginReading method.

CVSS v3: 8.8
EG Score: 8.8(medium)
EPSS: 82.9%
KEV: Not listed

Published

April 30, 2016

Last Modified

May 6, 2026

References (18)

security@mozillahttp://lists.opensuse.org/opensuse-security-announce/2016-05/msg00005.html
security@mozillahttp://lists.opensuse.org/opensuse-updates/2016-05/msg00038.html
security@mozillahttp://www.mozilla.org/security/announce/2016/mfsa2016-42.html
security@mozillahttp://www.securitytracker.com/id/1035692
security@mozillahttp://www.ubuntu.com/usn/USN-2936-1
security@mozillahttp://www.ubuntu.com/usn/USN-2936-2
security@mozillahttp://www.ubuntu.com/usn/USN-2936-3
security@mozillahttps://bugzilla.mozilla.org/show_bug.cgi?id=1252330
security@mozillahttps://security.gentoo.org/glsa/201701-15
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00005.html
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-updates/2016-05/msg00038.html
af854a3a-2127-422b-91ae-364da2661108http://www.mozilla.org/security/announce/2016/mfsa2016-42.html
af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id/1035692
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/USN-2936-1
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/USN-2936-2

Patch Availability(1)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	firefox-testsuite (46.0+build5-0ubuntu0.16.04.2) @ xenial	2026-05-22	ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

UbuntuUSN-2936-1MEDIUM
Firefox vulnerabilities

Data Freshness Timeline

(refreshed 8× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-08 14:14 UTCEPSS rescore
2026-06-07 15:22 UTCEPSS rescore
2026-06-07 15:22 UTCEPSS rescore
2026-06-05 22:44 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-02 20:10 UTCEPSS rescore
2026-06-01 13:49 UTCEPSS rescore
2026-06-01 13:49 UTCEPSS rescore
2026-05-31 22:28 UTCEPSS rescore
2026-05-31 22:28 UTCEPSS rescore
2026-05-31 00:14 UTCEPSS rescore
2026-05-29 13:41 UTCEPSS rescore
2026-05-28 13:42 UTCEPSS rescore
2026-05-28 13:42 UTCEPSS rescore
2026-05-27 13:38 UTCEPSS rescore
2026-05-27 13:38 UTCEPSS rescore
2026-05-26 13:42 UTCEPSS rescore

Frequently asked(5)

What is CVE-2016-2811?

CVE-2016-2811 is a high vulnerability published on April 30, 2016. Use-after-free vulnerability in the ServiceWorkerInfo class in the Service Worker subsystem in Mozilla Firefox before 46.0 allows remote attackers to execute arbitrary code via vectors related to the BeginReading method.

When was CVE-2016-2811 disclosed?

CVE-2016-2811 was first published in the National Vulnerability Database on April 30, 2016, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2016-2811 actively exploited?

CVE-2016-2811 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 82.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2016-2811?

CVE-2016-2811 has a CVSS v3 base score of 8.8 (NVD).

How do I remediate CVE-2016-2811?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-2811, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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