CVE-2020-15678: debian debian_linux Use After Free
Vulnerability summary
CVE-2020-15678 is a high (CVSS 8.8) Use After Free vulnerability in debian debian_linux. EPSS estimates a 1.88% chance of exploitation in the next 30 days, higher than 79.1% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 29 · Related 13Timeline
- 01-10-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
When recursing through graphical layers while scrolling, an iterator may have become invalid, resulting in a potential use-after-free. This occurs because the function APZCTreeManager::ComputeClippedCompositionBounds did not follow iterator invalidation rules. This vulnerability affects Firefox < 81, Thunderbird < 78.3, and Firefox ESR < 78.3.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
1.88%
Chance of exploitation in the next 30 days
Percentile
79%
Versus all other CVEs
30-day change
0.00 pp
From 1.88% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu5 products
- firefox< 81.0+build2-0ubuntu0.16.04.1 | < 81.0+build2-0ubuntu0.18.04.1 | < 81.0+build2-0ubuntu0.20.04.1
- mozjs38All versions (No fix recorded)
- mozjs52All versions (No fix recorded)
- mozjs68All versions (No fix recorded)
- thunderbird< 1:78.8.1+build1-0ubuntu0.18.04.1
Debian3 products
- firefox-esr< 78.3.0esr-1
- thunderbird< 1:78.3.1-1
- debian_linuxEOL9.0 | 10.0
Mozilla3 products
- firefox≥ unspecified, < 81 | < 81.0
- firefox_esr≥ unspecified, < 78.3 | < 78.3
- thunderbird≥ unspecified, < 78.3 | < 78.3
Opensuse1 product
- leapEOL15.1 | 15.2
4 vendors · 12 products
References
16 links- bugzilla.mozilla.org/show_bug.cgi?id=1660211X Refsource MISCIssue TrackingPermissions RequiredVendor Advisory
- lists.debian.org/debian-lts-announce/2020/10/msg00020.htmlMailing ListX Refsource MLISTThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-10/msg00074.htmlVendor AdvisoryX Refsource SUSEBroken LinkMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-10/msg00077.htmlVendor AdvisoryX Refsource SUSEBroken LinkMailing ListThird Party Advisory