Use-after-free in the Graphics: Canvas2D component
Published Sep 29, 2026 · Updated Oct 24, 2026
Original summary
Normalized public record · Updated Oct 24, 2026
Use-after-free in the Graphics: Canvas2D component
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
Use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- MEDIUM
- Confidence
- 10%
- Aliases
- None reported
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
- bugzilla.mozilla.org ↗
- Security advisory ↗
- Security advisory ↗
- Security advisory ↗
- Security advisory ↗
- Security advisory ↗
- Security advisory ↗
- Security advisory ↗
Record history
Published Sep 29, 2026 · Last refreshed Oct 24, 2026