CVE-2016-5261

Mozilla: Integer overflow and memory corruption in WebSocketChannel (MFSA 2016-75, MFSA 2016-86)

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Severity

Important

Red Hat Product Security

8.8

CVSS 3.0

Review impact separately from score.

Published · September 20, 2016

Updated · November 21, 2025

Description

Integer overflow in the WebSocketChannel class in the WebSockets subsystem in Mozilla Firefox before 48.0 and Firefox ESR < 45.4 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via crafted packets that trigger incorrect buffer-resize operations during buffering.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.0 · 8.8
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS 2.0 · 5.1
AV:N/AC:H/Au:N/C:P/I:P/A:P

CWE not specified