Vulnerability Description
When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrectly cast to the wrong type. This resulted in a heap user-after-free, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 84.0 |
| Mozilla | Firefox Esr | < 78.6.0 |
| Mozilla | Thunderbird | < 78.6.0 |
Related Weaknesses (CWE)
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1681022Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2020-54/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-55/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-56/Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1681022Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2020-54/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-55/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-56/Vendor Advisory
FAQ
What is CVE-2020-26974?
CVE-2020-26974 is a vulnerability with a CVSS score of 8.8 (HIGH). When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrectly cast to the wrong type. This resulted in a heap user-after-free, memory corruption, and a potent...
How severe is CVE-2020-26974?
CVE-2020-26974 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-2020-26974?
Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Firefox, Mozilla Firefox Esr, Mozilla Thunderbird.