CVE-2021-21124: Potential user after free in Speech Recognizer

Reference Links

• https://chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop_19.html (Advisory)
• https://crbug.com/1131346
• https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-21124

Parent vulnerabilities

(Appears in the following advisories)

• 8963246051762193641

Peer vulnerabilities

(Found alongside the following vulnerabilities)

• CVE-2021-21117
• CVE-2021-21118
• CVE-2021-21119
• CVE-2021-21120
• CVE-2021-21121
• CVE-2021-21122
• CVE-2021-21123
• CVE-2021-21125
• CVE-2020-16044
• CVE-2021-21126
• CVE-2021-21127
• CVE-2021-21128
• CVE-2021-21129
• CVE-2021-21130
• CVE-2021-21131
• CVE-2021-21132
• CVE-2021-21133
• CVE-2021-21134
• CVE-2021-21135
• CVE-2021-21136
• CVE-2021-21137
• CVE-2021-21138
• CVE-2021-21139
• CVE-2021-21140
• CVE-2021-21141

Frequently Asked Questions

• What is the severity of CVE-2021-21124?

  CVE-2021-21124 is considered a high severity vulnerability due to its potential for sandbox escape.

• How do I fix CVE-2021-21124?

  To fix CVE-2021-21124, update Google Chrome or Microsoft Edge Chromium to version 88.0.4324.96 or higher.

• What platforms are affected by CVE-2021-21124?

  CVE-2021-21124 affects Google Chrome on Android and Microsoft Edge Chromium prior to their respective updated versions.

• Can CVE-2021-21124 be exploited remotely?

  Yes, CVE-2021-21124 can potentially be exploited remotely via a crafted HTML page.

• What is a sandbox escape in relation to CVE-2021-21124?

  A sandbox escape in the context of CVE-2021-21124 refers to the ability of an attacker to break out of the restricted execution environment of the browser.