CVE-2016-9899: debian debian_linux Use After Free
Vulnerability summary
CVE-2016-9899 is a critical (CVSS 9.8) Use After Free vulnerability in debian debian_linux. EPSS estimates a 20.75% chance of exploitation in the next 30 days, higher than 97.5% of scored vulnerabilities. 2 public exploits are recorded.
Advisory lineage
Upstream 0 · Downstream 19 · Related 10Timeline
- 11-06-2018PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
Description
Use-after-free while manipulating DOM events and removing audio elements due to errors in the handling of node adoption. This vulnerability affects Firefox < 50.1, Firefox ESR < 45.6, and Thunderbird < 45.6.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
20.75%
Chance of exploitation in the next 30 days
Percentile
98%
Versus all other CVEs
30-day change
-0.40 pp
From 21.15% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
2 foundExploit Reference (bugzilla.mozilla.org)
Maturity: unknown
Mozilla Firefox < 50.1.0 - Use-After-Free
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Redhat6 products
- enterprise_linuxEOL5.0 | 6.0 | 7.0
- enterprise_linux_desktop5.0 | 6.0 | 7.0
- enterprise_linux_server5.0 | 6.0 | 7.0
- enterprise_linux_server_aus7.3 | 7.4
- enterprise_linux_server_eus7.3 | 7.4 | 7.5
Mozilla3 products
- firefox≥ unspecified, < 50.1 | ≥ 52.0, < 52.1.0 | < 53.0 | < 45.9.0
- firefox_esr≥ unspecified, < 45.6
- thunderbird≥ unspecified, < 45.6 | < 52.1.0
Debian2 products
- firefox-esr< 45.6.0esr-1
- debian_linuxEOL9.0
Ubuntu2 products
- firefox< 50.1.0+build2-0ubuntu0.14.04.1 | < 50.1.0+build2-0ubuntu0.16.04.1
- thunderbird< 1:45.7.0+build1-0ubuntu0.14.04.1 | < 1:45.7.0+build1-0ubuntu0.16.04.1
4 vendors · 13 products
