CVE-2021-21122: Use after free in Blink

Reference Links

• https://chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop_19.html (Advisory)
• https://crbug.com/1162131
• https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-21122

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-2021-21123
• CVE-2021-21124
• 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-2021-21122?

  CVE-2021-21122 has been classified as a high severity vulnerability.

• How do I fix CVE-2021-21122?

  To fix CVE-2021-21122, users should update their Google Chrome to version 88.0.4324.96 or later.

• What type of vulnerability is CVE-2021-21122?

  CVE-2021-21122 is characterized as a use-after-free vulnerability in Blink within Google Chrome.

• Which browsers are affected by CVE-2021-21122?

  CVE-2021-21122 affects Google Chrome versions prior to 88.0.4324.96 and Microsoft Edge Chromium versions prior to 88.0.705.50.

• Can an attacker exploit CVE-2021-21122 remotely?

  Yes, a remote attacker can exploit CVE-2021-21122 via a crafted HTML page, potentially leading to heap corruption.