CVE-2022-3266
MEDIUM
5.5
CVSS Score
Published: December 22, 2022 at 12:00 AM UTC
Updated: June 17, 2026 at 04:59 AM UTC
3 products affected across 1 vendorFirefoxThunderbirdFirefox ESR
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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.3%
SSVC
PoC
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
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 105
Affected range stops below 105, so it looks safe — our inference, not a vendor statement
Affected range stops below 105.0, so it looks safe — our inference, not a vendor statement
v < 102.3
Affected range stops below 102.3, so it looks safe — our inference, not a vendor statement
v < 102.3
Affected range stops below 102.3, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (4)
Issue TrackingPermissions RequiredVendor Advisory
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1767360SSVC — Action Prioritization
SSVCPoCNot automatablePartial impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
5.5MEDIUMCISA-ADP
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- REQUIRED
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-125
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