Vulnerability Description
In certain circumstances, the MCallGetProperty opcode can be emitted with unmet assumptions resulting in an exploitable use-after-free condition. This vulnerability affects Firefox < 82.0.3, Firefox ESR < 78.4.1, and Thunderbird < 78.4.2.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 82.0.3 |
| Mozilla | Firefox Esr | < 78.4.1 |
| Mozilla | Thunderbird | < 78.4.2 |
Related Weaknesses (CWE)
References
- http://packetstormsecurity.com/files/166175/Firefox-MCallGetProperty-Write-Side-ExploitThird Party AdvisoryVDB Entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=1675905ExploitIssue TrackingVendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-49/Vendor Advisory
- http://packetstormsecurity.com/files/166175/Firefox-MCallGetProperty-Write-Side-ExploitThird Party AdvisoryVDB Entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=1675905ExploitIssue TrackingVendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-49/Vendor Advisory
FAQ
What is CVE-2020-26950?
CVE-2020-26950 is a vulnerability with a CVSS score of 8.8 (HIGH). In certain circumstances, the MCallGetProperty opcode can be emitted with unmet assumptions resulting in an exploitable use-after-free condition. This vulnerability affects Firefox < 82.0.3, Firefox E...
How severe is CVE-2020-26950?
CVE-2020-26950 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-26950?
Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Firefox, Mozilla Firefox Esr, Mozilla Thunderbird.