CVE-2021-21138: Use after free in DevTools

Reference Links

• https://chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop_19.html (Advisory)
• https://crbug.com/1122487

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-2021-21124
• 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-2021-21139
• CVE-2021-21140
• CVE-2021-21141

Frequently Asked Questions

• What is the severity of CVE-2021-21138?

  CVE-2021-21138 is classified as a high severity vulnerability due to its potential for sandbox escape.

• How do I fix CVE-2021-21138?

  To fix CVE-2021-21138, users must update Google Chrome to version 88.0.4324.96 or later.

• Who is affected by CVE-2021-21138?

  CVE-2021-21138 affects all versions of Google Chrome prior to 88.0.4324.96.

• Can CVE-2021-21138 be exploited remotely?

  CVE-2021-21138 requires local access to exploit, as it involves a use after free vulnerability in DevTools.

• What types of attacks exploit CVE-2021-21138?

  CVE-2021-21138 can potentially allow local attackers to perform a sandbox escape via crafted files.