CVE-2021-23997: Use After Free

Reference Links

• https://bugzilla.mozilla.org/show_bug.cgi?id=1701942
• https://www.mozilla.org/en-US/security/advisories/mfsa2021-16/
• https://www.mozilla.org/security/advisories/mfsa2021-16/

Parent vulnerabilities

(Appears in the following advisories)

• MFSA2021-16

Peer vulnerabilities

(Found alongside the following vulnerabilities)

• CVE-2021-23994
• CVE-2021-23995
• CVE-2021-23996
• CVE-2021-23997
• CVE-2021-23998
• CVE-2021-23999
• CVE-2021-24000
• CVE-2021-24001
• CVE-2021-24002
• CVE-2021-29945
• CVE-2021-29944
• CVE-2021-29946
• CVE-2021-29947

Frequently Asked Questions

• What is the severity of CVE-2021-23997?

  CVE-2021-23997 has a moderate severity rating due to the potential for exploitation leading to arbitrary code execution.

• How do I fix CVE-2021-23997?

  To fix CVE-2021-23997, update Mozilla Firefox to version 88 or later.

• What versions of Firefox are affected by CVE-2021-23997?

  CVE-2021-23997 affects all versions of Mozilla Firefox prior to version 88.

• Can CVE-2021-23997 be exploited remotely?

  Yes, CVE-2021-23997 could potentially be exploited remotely through crafted web content.

• What is a use-after-free vulnerability in the context of CVE-2021-23997?

  A use-after-free vulnerability like CVE-2021-23997 occurs when memory that has been freed is accessed, potentially leading to arbitrary code execution.