⚠ Actively exploited
Added to CISA KEV on 2021-11-03. Federal agencies required to patch by 2021-11-17. Required action: Apply updates per vendor instructions..

CVE-2021-21193 — Use After Free in Google Chrome

CWE-416 — Use After Free14 documents11 sources
Severity
8.8HIGHNVD
EPSS
21.3%
top 4.30%
CISA KEV
KEV
Added 2021-11-03
Due 2021-11-17
Exploit
Exploited in wild
Active exploitation observed
Affected products
7
Google ChromeChromiumDebian Chromium+4 more
Timeline
PublishedMar 16
KEV addedNov 3
KEV dueNov 17
Latest updateMay 24
CISA Required Action: Apply updates per vendor instructions.

Description

Use after free in Blink in Google Chrome prior to 89.0.4389.90 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitability: 2.8 | Impact: 5.9

Affected Packages6 packages

▶CVEListV5google/chromeunspecified — 89.0.4389.90
▶NVDgoogle/chrome< 89.0.4389.90
▶debiandebian/chromium< chromium 89.0.4389.90-1 (bookworm)
▶Debianchromium/chromium< 89.0.4389.90-1+3

Also affects: Debian Linux 10.0, Fedora 32

🔴Vulnerability Details

4
GHSA
GHSA-hf6r-r2hj-f2g7: Use after free in Blink in Google Chrome prior to 89↗2022-05-24
▶
Project0
The More You Know, The More You Know You Don’t Know - Project Zero↗2022-04-01
▶
OSV
CVE-2021-21193: Use after free in Blink in Google Chrome prior to 89↗2021-03-16
▶
VulnCheck
Google Chromium Blink Use-After-Free Vulnerability↗2021
▶

📋Vendor Advisories

4
CISA
Google Chromium Blink Use-After-Free Vulnerability↗2021-11-03
▶
Chrome
Stable Channel Update for Desktop: CVE-2021-21191↗2021-03-12
▶
Microsoft
Chromium CVE-2021-21193: Use after free in Blink↗2021-03-09
▶
Debian
CVE-2021-21193: chromium - Use after free in Blink in Google Chrome prior to 89.0.4389.90 allowed a remote ...↗2021
▶

🕵️Threat Intelligence

5
Qualys
Managing CISA Known Exploited Vulnerabilities with Qualys VMDR | Qualys↗2022-02-23
▶
Qualys
Qualys Response to CISA Alert: Binding Operational Directive 22-01↗2021-11-09
▶
Qualys
Qualys Response to CISA Alert: Binding Operational Directive 22-01 | Qualys↗2021-11-09
▶
Crowdstrike
Patch Tuesday 2021: A Vulnerability Deep Dive↗
▶
Crowdstrike
Patch Tuesday 2021: A Vulnerability Deep Dive↗
▶