CVE-2021-29947: High severity Mozilla Firefox vulnerability
Mozilla developers and community members reported memory safety bugs present in Firefox 87. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 88.
Other sources
Mozilla developers and community members Ryan VanderMeulen, Sean Feng, Tyson Smith, Julian Seward, Christian Holler reported memory safety bugs present in Firefox 87. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Firefoxto a version that resolves this vulnerability.Fixed in 88 - Upgrade
Upgrade
alpine/firefoxto a version that resolves this vulnerability.Fixed in 88.0-r0 - Upgrade
Upgrade
alpine/librewolfto a version that resolves this vulnerability.Fixed in 88.0-r0
Event History
Peer vulnerabilities
Found alongside the following vulnerabilities.
Frequently Asked Questions
What is the severity of CVE-2021-29947?
CVE-2021-29947 is considered a critical vulnerability due to its potential for memory corruption and exploitation to execute arbitrary code.
How do I fix CVE-2021-29947?
To fix CVE-2021-29947, update your Mozilla Firefox browser to version 88 or later.
Which versions of Firefox are affected by CVE-2021-29947?
CVE-2021-29947 affects Firefox versions prior to 88.
What type of vulnerability is CVE-2021-29947?
CVE-2021-29947 is categorized as a memory safety vulnerability.
Can CVE-2021-29947 be exploited?
Yes, with sufficient effort, CVE-2021-29947 may be exploited to run arbitrary code.