CVE-2019-11693: mozilla firefox Out-of-bounds Write
Vulnerability summary
CVE-2019-11693 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in mozilla firefox. EPSS estimates a 2.41% chance of exploitation in the next 30 days, higher than 84.1% of scored vulnerabilities.
Severe, CVSS 9.8 (NVD); no exploitation reported by the 5 checked sources; EPSS 2% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 22 · Related 10Timeline
- 23-07-2019PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
The bufferdata function in WebGL is vulnerable to a buffer overflow with specific graphics drivers on Linux. This could result in malicious content freezing a tab or triggering a potentially exploitable crash. *Note: this issue only occurs on Linux. Other operating systems are unaffected.*. This vulnerability affects Thunderbird < 60.7, Firefox < 67, and Firefox ESR < 60.7.
CVSS metrics
5 scores · 4 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
- OSV · AlpineEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
2.41%
Chance of exploitation in the next 30 days
Percentile
84%
Versus all other CVEs
30-day change
No change 0.00 pp
From 2.41% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu4 products
- firefox< 67.0+build2-0ubuntu0.16.04.1 | < 67.0+build2-0ubuntu0.18.04.1
- mozjs38All versions (No fix recorded)
- mozjs52All versions (No fix recorded)
- thunderbird< 1:60.7.0+build1-0ubuntu0.16.04.1 | < 1:60.7.0+build1-0ubuntu0.18.04.1
Mozilla3 products
- firefox≥ unspecified, < 67 | < 60.7.0 | < 67.0
- firefox esr≥ unspecified, < 60.7
- thunderbird≥ unspecified, < 60.7 | < 60.7.0
Debian2 products
- firefox-esr< 60.7.0esr-1
- thunderbird< 1:60.7.0-1
Alpine1 product
- firefox-esr< 60.7.0-r0
4 vendors · 10 products
References
12 links- bugzilla.mozilla.org/show_bug.cgi?id=1532525X Refsource MISCIssue TrackingPermissions RequiredVendor Advisory
