CVE-2022-40962
No exploitation reported by the sources we read.
- Published2022-12-22
- Fixed in105.0
- WeaknessCWE-787
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
Mozilla developers Nika Layzell, Timothy Nikkel, Sebastian Hengst, Andreas Pehrson, and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 104 and Firefox ESR 102.2. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 102.3, Thunderbird < 102.3, and Firefox < 105.
Timeline
dates in UTC- 2022-12-2220:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2022-40962?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2022-40962?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 105.0 | < 105.0 | 105.0 | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 102.3 | < 102.3 | 102.3 | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 102.3 | < 102.3 | 102.3 | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Packages
- firefoxAlmaLinux:9all versions · fixed in 102.3.0-6.el9_0.alma
- firefoxAlmaLinux:8all versions · fixed in 102.3.0-6.el8_6.alma
- thunderbirdAlmaLinux:9all versions · fixed in 102.3.0-3.el9_0.alma
- thunderbirdAlmaLinux:8all versions · fixed in 102.3.0-3.el8_6.alma
Fix
- Update Mozilla firefox to 105.0
Advisories and patches
- www.mozilla.orgVendor Advisory
- www.mozilla.orgVendor Advisory
- www.mozilla.orgVendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Published
- 2022-12-22
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2022-40962?
Is CVE-2022-40962 actively exploited?
What is the CVSS score for CVE-2022-40962?
Running firefox? Hear about its next vulnerability
Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
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Go further
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.