CVE-2020-26960: Use After Free
First published: Tue 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.
Credit: security@mozilla.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Mozilla Firefox ESR | <78.5 | 78.5 |
| <83 | 83 | |
| <78.5 | 78.5 | |
| <78.5 | 78.5 | |
| Mozilla Firefox | <83.0 | |
| Mozilla Firefox ESR | <78.5 | |
| Mozilla Thunderbird | <78.5 |
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Reference Links
- https://bugzilla.mozilla.org/show_bug.cgi?id=1670358
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-51/
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-50/
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-52/
- https://www.mozilla.org/security/advisories/mfsa2020-50/
- https://www.mozilla.org/security/advisories/mfsa2020-51/
- https://www.mozilla.org/security/advisories/mfsa2020-52/
Peer vulnerabilities
(Found alongside the following vulnerabilities)
Frequently Asked Questions
What is the vulnerability ID of this issue?
The vulnerability ID of this issue is CVE-2020-26960.
What is the severity rating of CVE-2020-26960?
The severity rating of CVE-2020-26960 is critical.
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.
What is the potential impact of CVE-2020-26960?
CVE-2020-26960 could lead to a use-after-free vulnerability and exploitable crash.
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).
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