CVE-2016-5276
9.8
CRITICAL
CVSS 3.1
EPSS 1.9%
Description
Use-after-free vulnerability in the mozilla::a11y::DocAccessible::ProcessInvalidationList function in Mozilla Firefox before 49.0, Firefox ESR 45.x before 45.4, and Thunderbird < 45.4 allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via an aria-owns attribute.
How to fix CVE-2016-5276
To remediate CVE-2016-5276, upgrade the affected package to a fixed version below.
- Debian/firefox-esr—upgrade to 45.4.0esr-1 or later
Is CVE-2016-5276 being exploited?
Low — EPSS is 1.9%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 45.4.0esr-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |