CVE-2017-7784: debian debian_linux Use After Free
Vulnerability summary
CVE-2017-7784 is a critical (CVSS 9.8) Use After Free vulnerability in debian debian_linux. EPSS estimates a 3.50% chance of exploitation in the next 30 days, higher than 89% of scored vulnerabilities. 1 public exploit is recorded.
Advisory lineage
Upstream 0 · Downstream 17 · Related 8Timeline
- 11-06-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
A use-after-free vulnerability can occur when reading an image observer during frame reconstruction after the observer has been freed. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.3, Firefox ESR < 52.3, and Firefox < 55.
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
3.50%
Chance of exploitation in the next 30 days
Percentile
89%
Versus all other CVEs
30-day change
-0.07 pp
From 3.57% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (bugzilla.mozilla.org)
Maturity: unknown
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< 55.0
- firefox_esr< 52.3
- thunderbird< 52.3.0
Ubuntu3 products
- firefox< 55.0.1+build2-0ubuntu0.14.04.2 | < 55.0.1+build2-0ubuntu0.16.04.2
- mozjs38All versions (No fix recorded)
- thunderbird< 1:52.3.0+build1-0ubuntu0.14.04.1 | < 1:52.3.0+build1-0ubuntu0.16.04.1 | < 1:52.4.0+build1-0ubuntu2
Debian2 products
- firefox-esr< 52.3.0esr-1
- debian_linuxEOL8.0 | 9.0
4 vendors · 14 products
