CVE-2026-92014: mozilla firefox Classic Buffer Overflow
CVSS: 8.8v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-92014DEBIAN-CVE-2026-92014
Published 15-09-2026Last modified 16-09-2026
Vulnerability summary
CVE-2026-92014 is a high (CVSS 8.8) Classic Buffer Overflow vulnerability in mozilla firefox. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14% of scored vulnerabilities.
CVSS score
8.8/10
010
High · v3.1 (CVE.org)EPSS score
0.24%
0%100%
Low · -0.02 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 24 · Related 1MGASA-2026-0441MGASA-2026-0449OPENSUSE-SU-2026:11827-1RHSA-2026:69461RHSA-2026:69462RHSA-2026:70642RHSA-2026:71652RHSA-2026:73130RHSA-2026:73971RHSA-2026:81392RHSA-2026:81393RHSA-2026:81394RHSA-2026:81884RHSA-2026:81912RHSA-2026:81913RHSA-2026:82122RHSA-2026:82720RHSA-2026:82779RHSA-2026:82780RHSA-2026:82817RHSA-2026:82818RHSA-2026:83076RHSA-2026:83077RHSA-2026:83496
Timeline
- 15-09-2026PublishedVulnerability first disclosed.
- 16-09-2026Last modifiedVulnerability information updated.
Description
Privilege escalation due to incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Firefox ESR 115.41, Firefox ESR 140.16, and Thunderbird 140.16.
CVSS metrics
4 scores · 4 sources · 1 versionHigh 8.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HSourcesAll 4 agree
- 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
- NVDNIST8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.24%
Chance of exploitation in the next 30 days
Percentile
14%
Versus all other CVEs
30-day change
-0.02 pp
From 0.26% on 20-09-2026
20-09-202620-10-2026
EPSS score0.24%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu8 products
- mozjs102All versions (No fix recorded)
- mozjs115All versions (No fix recorded)
- mozjs38All versions (No fix recorded)
- mozjs52All versions (No fix recorded)
- mozjs68All versions (No fix recorded)
Debian2 products
- firefox-esr< 140.16.0esr-1~deb12u1 | < 140.16.0esr-1~deb13u1 | < 140.16.0esr-1
- thunderbird< 1:140.16.0esr-1~deb12u1 | < 1:140.16.0esr-1~deb13u1 | < 1:153.3.0esr-1
Mozilla2 products
- firefox< 115.41.0 | ≥ 116.0, < 140.16.0
- thunderbird< 140.16.0
3 vendors · 12 products
References
7 links- bugzilla.mozilla.org/show_bug.cgi?id=2060000Permissions Required
- www.mozilla.org/security/advisories/mfsa2026-91/Vendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-92/Vendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-95/Vendor Advisory
