CVE-2022-3266: mozilla firefox Out-of-bounds Read
CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2022-3266DEBIAN-CVE-2022-3266
Published 22-12-2022Last modified 15-04-2025
Vulnerability summary
CVE-2022-3266 is a medium (CVSS 5.5) Out-of-bounds Read vulnerability in mozilla firefox. EPSS estimates a 0.30% chance of exploitation in the next 30 days, higher than 21.7% of scored vulnerabilities.
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)EPSS score
0.30%
0%100%
Low · +0.01 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 19 · Related 3Timeline
- 22-12-2022PublishedVulnerability first disclosed.
- 15-04-2025Last modifiedVulnerability information updated.
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.
CVSS metrics
4 scores · 4 sources · 1 versionMedium 5.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HSourcesAll 4 agree
- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- NVDNIST5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.30%
Chance of exploitation in the next 30 days
Percentile
22%
Versus all other CVEs
30-day change
+0.01 pp
From 0.29% on 20-09-2026
20-09-202620-10-2026
EPSS score0.30%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Mozilla3 products
- firefox≥ unspecified, < 105 | < 105.0
- firefox_esr≥ unspecified, < 102.3 | < 102.3
- thunderbird≥ unspecified, < 102.3 | < 102.3
Debian2 products
- firefox-esr< 102.3.0esr-1
- thunderbird< 1:102.3.0-1
Ubuntu2 products
- firefox< 105.0+build2-0ubuntu0.18.04.1 | < 105.0+build2-0ubuntu0.20.04.1
- thunderbird< 1:102.4.2+build2-0ubuntu0.18.04.1 | < 1:102.4.2+build2-0ubuntu0.20.04.1 | < 1:102.4.2+build2-0ubuntu0.22.04.1
3 vendors · 7 products
References
10 links- www.mozilla.org/security/advisories/mfsa2022-40/Vendor Advisory
- www.mozilla.org/security/advisories/mfsa2022-41/Vendor Advisory
- www.mozilla.org/security/advisories/mfsa2022-42/Vendor Advisory
