Critical severity · published Jan 7, 2021
CVE-2020-26972
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…
9.8
CVSS
1.3%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.3% · higher than 70% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
Firefox · Mozilla
before 84.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-26972
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-26972
Permissions Required
https://bugzilla.mozilla.org/show_bug.cgi?id=1671382
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-54/
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