CVE-2020-26960: Use After Free
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
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Thunderbirdto a version that resolves this vulnerability.Fixed in 78.5 - Upgrade
Upgrade
Firefoxto a version that resolves this vulnerability.Fixed in 83 - Upgrade
Upgrade
Firefox ESRto a version that resolves this vulnerability.Fixed in 78.5 - Upgrade
Upgrade
alpine/firefoxto a version that resolves this vulnerability.Fixed in 83.0-r0 - Upgrade
Upgrade
alpine/firefox-esrto a version that resolves this vulnerability.Fixed in 78.5.0-r0 - Upgrade
Upgrade
alpine/librewolfto a version that resolves this vulnerability.Fixed in 83.0-r0 - Upgrade
Upgrade
alpine/thunderbirdto a version that resolves this vulnerability.Fixed in 78.5.1-r0
Event History
Parent advisories
This vulnerability appears in the following advisories.
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).