PatchTheCVECVE-2020-6418: Google Chromium V8 Type Confusion Vulnerability
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HIGH 8.8EXPLOITEDWATCHLISTUPGRADEMITIGATEMITIGATE
CVE-2020-6418 is a high-severity flaw (CVSS 8.8) affecting chrome, fedora, enterprise linux desktop, reported as exploited in the wild. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Type confusion in V8 in Google Chrome prior to 80.0.3987.122 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
Why this priority
- High severity
- EPSS top 1%: very likely to be exploited
- Exploited in the wild (CISA KEV)
- Public exploit reference
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.8 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 78.8% (top 1%) |
| CISA exploited list | Yes, fix due 2022-05-03 |
| Weakness | CWE-843 |
| Published | 2020-02-27 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Exploited Added to the CISA Known Exploited Vulnerabilities list
- Deadline CISA due date for US federal agencies to patch
- Updated Record last modified
google chrome UPGRADE
Affected: < 80.0.3987.122
Fixed in: 80.0.3987.122
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy chrome || rpm -q chrome || chrome --version
2. UPGRADE to 80.0.3987.122 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade chrome
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade chrome
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
fedoraproject fedora MITIGATE
Affected: 30 · 31
Fixed in: no fixed release known
Safe to downgrade to: a release before 30
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
redhat enterprise linux desktop MITIGATE
Affected: 6.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 6.0
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
redhat enterprise linux server MITIGATE
Affected: 6.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 6.0
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
redhat enterprise linux workstation MITIGATE
Affected: 6.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 6.0
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
debian debian linux MITIGATE
Affected: 9.0 · 10.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 9.0
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
Exact fixes by distribution
A distro patch exists: prefer upgrading over downgrading.
Fedora 46 · feh · FIXED · 3.13.1-1.fc46 · FEDORA-2026-3c76a13a4f · source
sudo dnf upgrade --advisory=FEDORA-2026-3c76a13a4f
Fedora ELN · setroubleshoot · FIXED · 3.3.37-7.eln159 · FEDORA-2026-f81b122fe1 · source
sudo dnf upgrade --advisory=FEDORA-2026-f81b122fe1
Debian 12 · chromium · FIXED · 80.0.3987.122-1
sudo apt update && sudo apt install --only-upgrade chromium
dpkg --compare-versions "$(dpkg-query -W -f='${Version}' chromium)" ge "80.0.3987.122-1" && echo PATCHED || echo STILL-VULNERABLE
Debian 13 · chromium · FIXED · 80.0.3987.122-1
sudo apt update && sudo apt install --only-upgrade chromium
dpkg --compare-versions "$(dpkg-query -W -f='${Version}' chromium)" ge "80.0.3987.122-1" && echo PATCHED || echo STILL-VULNERABLE
RHEL 6 Supplementary · chromium-browser · FIXED · chromium-browser-80.0.3987.122-1.el6_10
sudo dnf upgrade --advisory=RHSA-2020:0738
rpm -q chromium-browser
Public exploits and detection
Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.
- GitHub PoC: Goyotan/CVE-2020-6418-PoC (3 stars)
- GitHub PoC: ulexec/ChromeSHELFLoader (3 stars)
- GitHub PoC: SivaPriyaRanganatha/CVE-2020-6418 (1 stars)
- GitHub PoC: ASkyeye/CVE-2020-6418
- GitHub PoC: ChoKyuWon/CVE-2020-6418
- Exploit-DB: Google Chrome 80 - JSCreate Side-effect Type Confusion (Metasploit)
- Metasploit: Google Chrome 80 JSCreate side-effect type confusion exploit
Verify at the official source NVD · CVE Program · CISA KEV catalog · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2020-6418?
chrome: upgrade to 80.0.3987.122; fedora: mitigate or apply the listed mitigation; enterprise linux desktop: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2020-6418 being exploited?
Yes. CVE-2020-6418 is on the CISA Known Exploited Vulnerabilities list, so treat it as patch-now.
What does CVE-2020-6418 affect?
CVE-2020-6418 affects chrome, fedora, enterprise linux desktop. Severity is high (CVSS 8.8). Type confusion in V8 in Google Chrome prior to 80.0.3987.122 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
How urgent is CVE-2020-6418?
Priority 91/100. High severity; EPSS top 1%: very likely to be exploited; Exploited in the wild (CISA KEV); Public exploit reference; On your watchlist
Software pages
Debian vulnerabilities · Google Chrome vulnerabilities · Chromium vulnerabilities
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