Actively exploited · Published Apr 26, 2021 · Assigned by Chrome
CVE-2021-21206
High 8.8 Exploited
In plain English
A high-severity use-after-free in Chrome from Google. Attackers are actively exploiting it in the wild (listed by CISA on November 3, 2021). The chance it is exploited in the next 30 days is estimated at 9.3% (higher than 95% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)9.3%top 4.6% of all CVEs
Exploited in the wildYesCISA KEV since Nov 3, 2021
Attack toolingNoneno public tooling known
CISA guidance
Apply updates per vendor instructions.
Federal agencies must remediate by Nov 17, 2021.
Official description
Use after free in Blink in Google Chrome prior to 89.0.4389.128 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | chromium | 89.0.4389.128-r0 | ALPINE-CVE-2021-21206 |
| Alpine:v3.21 | chromium | 89.0.4389.128-r0 | ALPINE-CVE-2021-21206 |
| Alpine:v3.22 | chromium | 89.0.4389.128-r0 | ALPINE-CVE-2021-21206 |
| Alpine:v3.23 | chromium | 89.0.4389.128-r0 | ALPINE-CVE-2021-21206 |
| Alpine:v3.24 | chromium | 89.0.4389.128-r0 | ALPINE-CVE-2021-21206 |
| Alpine:v3.20 | qt5-qtwebengine | 5.15.3_git20210510-r0 | ALPINE-CVE-2021-21206 |
| Alpine:v3.21 | qt5-qtwebengine | 5.15.3_git20210510-r0 | ALPINE-CVE-2021-21206 |
| Alpine:v3.22 | qt5-qtwebengine | 5.15.3_git20210510-r0 | ALPINE-CVE-2021-21206 |
| Alpine:v3.23 | qt5-qtwebengine | 5.15.3_git20210510-r0 | ALPINE-CVE-2021-21206 |
| Debian:12 | chromium | 90.0.4430.72-1 | DEBIAN-CVE-2021-21206 |
| Debian:13 | chromium | 90.0.4430.72-1 | DEBIAN-CVE-2021-21206 |
| Debian:14 | chromium | 90.0.4430.72-1 | DEBIAN-CVE-2021-21206 |
Affected products (as reported)
Weakness: CWE-416 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
References
- https://crbug.com/1196781 x_refsource_MISC
- https://chromereleases.googleblog.com/2021/04/stable-channel-update-for-desktop.html x_refsource_MISC
- GLSA-202104-08 vendor-advisory, x_refsource_GENTOO
- FEDORA-2021-c3754414e7 vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-ff893e12c5 vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-35d2bb4627 vendor-advisory, x_refsource_FEDORA
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21206 government-resource