Vulnerability · Published Sep 15, 2026 · Assigned by mozilla
CVE-2026-92014Privilege escalation due to incorrect boundary conditions in the Graphics component
High 8.8
In plain English
A high-severity buffer overflow in Firefox from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.2%top 84.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | firefox | 140.16.0-1.el10_2 | ALSA-2026:69461 |
| AlmaLinux:8 | firefox | 140.16.0-1.el8_10.alma.1 | ALSA-2026:71652 |
| AlmaLinux:9 | firefox | 140.16.0-1.el9_8.alma.1 | ALSA-2026:69462 |
| AlmaLinux:9 | firefox-x11 | 140.16.0-1.el9_8.alma.1 | ALSA-2026:69462 |
| AlmaLinux:10 | thunderbird | 140.16.0-1.el10_2.alma.1 | ALSA-2026:73130 |
| AlmaLinux:8 | thunderbird | 140.16.0-1.el8_10.alma.1 | ALSA-2026:73971 |
| AlmaLinux:9 | thunderbird | 140.16.0-1.el9_8.alma.1 | ALSA-2026:70642 |
| Debian:12 | firefox-esr | 140.16.0esr-1~deb12u1 | DEBIAN-CVE-2026-92014 |
| Debian:13 | firefox-esr | 140.16.0esr-1~deb13u1 | DEBIAN-CVE-2026-92014 |
| Debian:14 | firefox-esr | 140.16.0esr-1 | DEBIAN-CVE-2026-92014 |
| Debian:12 | thunderbird | 1:140.16.0esr-1~deb12u1 | DEBIAN-CVE-2026-92014 |
| Debian:13 | thunderbird | 1:140.16.0esr-1~deb13u1 | DEBIAN-CVE-2026-92014 |
| Debian:14 | thunderbird | 1:153.3.0esr-1 | DEBIAN-CVE-2026-92014 |
| Rocky Linux:10 | firefox | 0:140.16.0-1.el10_2 | RLSA-2026:69461 |
| Rocky Linux:8 | firefox | 0:140.16.0-1.el8_10 | RLSA-2026:71652 |
| Rocky Linux:9 | firefox | 0:140.16.0-1.el9_8 | RLSA-2026:69462 |
| Rocky Linux:10 | thunderbird | 0:140.16.0-1.el10_2 | RLSA-2026:73130 |
| Rocky Linux:8 | thunderbird | 0:140.16.0-1.el8_10 | RLSA-2026:73971 |
| Rocky Linux:9 | thunderbird | 0:140.16.0-1.el9_8 | RLSA-2026:70642 |
| Ubuntu:22.04:LTS | mozjs102 | no fix listed | UBUNTU-CVE-2026-92014 |
| Ubuntu:24.04:LTS | mozjs102 | no fix listed | UBUNTU-CVE-2026-92014 |
| Ubuntu:24.04:LTS | mozjs115 | no fix listed | UBUNTU-CVE-2026-92014 |
| Ubuntu:22.04:LTS | mozjs78 | no fix listed | UBUNTU-CVE-2026-92014 |
| Ubuntu:22.04:LTS | mozjs91 | no fix listed | UBUNTU-CVE-2026-92014 |
| Ubuntu:22.04:LTS | thunderbird | no fix listed | UBUNTU-CVE-2026-92014 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | see references |
| Mozilla | Thunderbird | see references |
Weakness: CWE-120 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H