CVE-2020-26960: Use After Free
Published Nov 17, 2020
·Updated
If the Compact() method was called on an nsTArray, the array could have been reallocated without updating other pointers, leading to a potential use-after-free and exploitable crash.
Affected Software
6 affected componentsFixes available
Mozilla Thunderbird<78.5
78.5
Mozilla Firefox<83.0
Mozilla Firefox ESR<78.5
Mozilla Thunderbird<78.5
Mozilla Firefox<83
83
Mozilla Firefox ESR<78.5
78.5
Event History
Nov 17, 2020
CVE Published
12:00 AM
Dec 9, 2020
CVE Published
via MITRE·12:23 AM
Data Sourced
via MITRE·12:23 AM
DescriptionWeakness
Parent advisories
This vulnerability appears in the following advisories.
Peer vulnerabilities
Found alongside the following vulnerabilities.
Frequently Asked Questions
1
What is the vulnerability ID of this issue?
The vulnerability ID of this issue is CVE-2020-26960.
2
What is the severity rating of CVE-2020-26960?
The severity rating of CVE-2020-26960 is critical.
3
Which software versions are affected by CVE-2020-26960?
CVE-2020-26960 affects Firefox versions prior to 83, Firefox ESR versions prior to 78.5, and Thunderbird versions prior to 78.5.
4
What is the potential impact of CVE-2020-26960?
CVE-2020-26960 could lead to a use-after-free vulnerability and exploitable crash.
5
How can I fix CVE-2020-26960?
To fix CVE-2020-26960, update Firefox to version 83 (or later), Firefox ESR to version 78.5 (or later), or Thunderbird to version 78.5 (or later).