Vulnerability · Published Dec 22, 2022 · Assigned by mozilla
CVE-2022-3266
Medium 5.5
In plain English
A medium-severity out-of-bounds read in Firefox from Mozilla. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.3%top 76.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
An out-of-bounds read can occur when decoding H264 video. This results in a potentially exploitable crash. This vulnerability affects Firefox ESR < 102.3, Thunderbird < 102.3, and Firefox < 105.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | firefox-esr | 102.3.0-r0 | ALPINE-CVE-2022-3266 |
| Alpine:v3.21 | firefox-esr | 102.3.0-r0 | ALPINE-CVE-2022-3266 |
| Alpine:v3.22 | firefox-esr | 102.3.0-r0 | ALPINE-CVE-2022-3266 |
| Alpine:v3.23 | firefox-esr | 102.3.0-r0 | ALPINE-CVE-2022-3266 |
| Debian:12 | firefox-esr | 102.3.0esr-1 | DEBIAN-CVE-2022-3266 |
| Debian:13 | firefox-esr | 102.3.0esr-1 | DEBIAN-CVE-2022-3266 |
| Debian:14 | firefox-esr | 102.3.0esr-1 | DEBIAN-CVE-2022-3266 |
| Debian:12 | thunderbird | 1:102.3.0-1 | DEBIAN-CVE-2022-3266 |
| Debian:13 | thunderbird | 1:102.3.0-1 | DEBIAN-CVE-2022-3266 |
| Debian:14 | thunderbird | 1:102.3.0-1 | DEBIAN-CVE-2022-3266 |
| Ubuntu:22.04:LTS | thunderbird | 1:102.4.2+build2-0ubuntu0.22.04.1 | UBUNTU-CVE-2022-3266 |
| Ubuntu:22.04:LTS | thunderbird | 1:102.4.2+build2-0ubuntu0.22.04.1 | USN-5724-1 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox ESR | unspecified – before 102.3 |
| Mozilla | Thunderbird | unspecified – before 102.3 |
| Mozilla | Firefox | unspecified – before 105 |
Weakness: CWE-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H