Vulnerability Description
The lifecycle of IPC Actors allows managed actors to outlive their manager actors; and the former must ensure that they are not attempting to use a dead actor they have a reference to. Such a check was omitted in WebGL, resulting in a use-after-free and a potentially exploitable crash. This vulnerability affects Firefox < 84.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 84.0 |
Related Weaknesses (CWE)
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1671382Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2020-54/Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1671382Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2020-54/Vendor Advisory
FAQ
What is CVE-2020-26972?
CVE-2020-26972 is a vulnerability with a CVSS score of 9.8 (CRITICAL). The lifecycle of IPC Actors allows managed actors to outlive their manager actors; and the former must ensure that they are not attempting to use a dead actor they have a reference to. Such a check wa...
How severe is CVE-2020-26972?
CVE-2020-26972 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2020-26972?
Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Firefox.