CVE-2017-7809: debian debian_linux Use After Free
Vulnerability summary
CVE-2017-7809 is a critical (CVSS 9.8) Use After Free vulnerability in debian debian_linux. EPSS estimates a 2.59% chance of exploitation in the next 30 days, higher than 85% of scored vulnerabilities. 1 public exploit is recorded.
Advisory lineage
Upstream 0 · Downstream 13 · Related 4Timeline
- 11-06-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
A use-after-free vulnerability can occur when an editor DOM node is deleted prematurely during tree traversal while still bound to the document. 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
2.59%
Chance of exploitation in the next 30 days
Percentile
85%
Versus all other CVEs
30-day change
-0.05 pp
From 2.64% 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_linuxEOL6.0 | 7.0
- enterprise_linux_desktop6.0 | 7.0
- enterprise_linux_server6.0 | 7.0
- enterprise_linux_server_aus7.3 | 7.4
- enterprise_linux_server_eus7.3 | 7.4 | 7.5
Debian2 products
- firefox-esr< 52.3.0esr-1
- debian_linuxEOL8.0 | 9.0
Mozilla2 products
- firefox< 55.0 | < 52.3.0
- thunderbird< 52.3.0
Ubuntu2 products
- firefox< 55.0.1+build2-0ubuntu0.14.04.2 | < 55.0.1+build2-0ubuntu0.16.04.2
- 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
4 vendors · 12 products
