CVE-2020-16017: Google Chrome Use-After-Free Vulnerability
Vulnerability summary
CVE-2020-16017 is a critical (CVSS 9.6) Use After Free vulnerability in Google Chrome. It is known to be exploited: CISA lists it, first on 03-11-2021. EPSS estimates a 2.73% chance of exploitation in the next 30 days, higher than 86.1% of scored vulnerabilities.
Listed as exploited by CISA (03-11-2021)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 9 · Related 7Timeline
- 08-01-2021PublishedVulnerability first disclosed.
- 03-11-2021Added to CISA KEVExploitedGoogle Chrome Use-After-Free Vulnerability
- 03-05-2022CISA remediation dueDeadline passedApply updates per vendor instructions.
- 21-10-2025Last modifiedVulnerability information updated.
Description
Use after free in site isolation in Google Chrome prior to 86.0.4240.198 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated9.6CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.6CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
- NVDNIST9.6CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
EPSS trend
Probability
2.73%
Chance of exploitation in the next 30 days
Percentile
86%
Versus all other CVEs
30-day change
No change 0.00 pp
From 2.73% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVListed- Added
- 03-11-2021
- Federal due date
- 03-05-2022
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
CISA required action
Apply updates per vendor instructions. nvd.nist.gov/vuln/detail/CVE-2020-16017
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.
NuGet4 products
- CefSharp.Common< 86.0.241
- CefSharp.WinForms< 86.0.241
- CefSharp.Wpf< 86.0.241
- CefSharp.Wpf.HwndHost< 86.0.241
Debian1 product
- chromium< 87.0.4280.88-0.1
Google1 product
- chrome≥ unspecified, < 86.0.4240.198 | < 86.0.4240.198
Ubuntu1 product
- chromium-browser< 86.0.4240.198-0ubuntu0.16.04.1 | < 86.0.4240.198-0ubuntu0.18.04.1
4 vendors · 7 products
References
9 links- chromereleases.googleblog.com/2020/11/stable-channel-update-for-desktop_11.htmlX Refsource MISCWEBRelease NotesVendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-16017Government ResourceUS Government Resource
