Security Resilience

CVE-2020-6418

Memory Safety in Fedoraproject Fedora 30 … 31

CISA KEVActive ExploitationEUVD ExploitedPublic PoCMemory Safety
Published
27 February 2020
Modified
24 October 2025
KEV Added
03 November 2021
Patch / advisory
View advisory
CVSS Score v3.1 8.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS Score 0.79 99.6th percentile
Risk Priority 90 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2020-6418 is a high-severity Type Confusion (CWE-843) vulnerability in Fedoraproject Fedora. Its CVSS base score is 8.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Junk Data (T1001.001); ranked in the top 0.4% of CVEs by exploit likelihood; CISA has added it to the Known Exploited Vulnerabilities catalog; a public proof-of-concept is referenced.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

The vulnerability CVE-2020-6418 is a type confusion flaw (CWE-843) in the V8 JavaScript engine of Google Chrome versions prior to 80.0.3987.122. It can result in heap corruption when the engine processes certain inputs, carrying a CVSS 3.1 base score of 8.8.

A remote attacker can trigger the issue by serving a crafted HTML page to a victim, enabling exploitation of the resulting memory corruption to potentially compromise confidentiality, integrity, and availability without requiring authentication.

Advisories and patches direct users to upgrade Chrome to 80.0.3987.122 or newer; Red Hat and Fedora have issued corresponding errata (RHSA-2020:0738 and Fedora package updates) that address the affected browser packages.

Public references include a detailed Chromium bug report and a proof-of-concept demonstrating side-effect handling during JSCreate operations that leads to the type confusion.

EU & UK References

Vulnerability Data

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.

CWE(s)
CWE-843
KEV Date Added
03 November 2021

Related Threats

MITRE ATT&CK Enterprise Techniques

T1001.001 Junk Data Command And Control
Adversaries may add junk data to protocols used for command and control to make detection more difficult.
attack.mitre.org →
T1003 OS Credential Dumping Credential Access
Adversaries may attempt to dump credentials to obtain account login and credential material, normally in the form of a hash or a clear text password.
attack.mitre.org →
T1003.005 Cached Domain Credentials Credential Access
Adversaries may attempt to access cached domain credentials used to allow authentication to occur in the event a domain controller is unavailable.
attack.mitre.org →
T1003.006 DCSync Credential Access
Adversaries may attempt to access credentials and other sensitive information by abusing a Windows Domain Controller's application programming interface (API)(Citation: Microsoft DRSR Dec 2017) (Citation: Microsoft GetNCCChanges) (Citati…
attack.mitre.org →
T1005 Data from Local System Collection
Adversaries may search local system sources, such as file systems, configuration files, local databases, virtual machine files, or process memory, to find files of interest and sensitive data prior to Exfiltration.
attack.mitre.org →
T1011.001 Exfiltration Over Bluetooth Exfiltration
Adversaries may attempt to exfiltrate data over Bluetooth rather than the command and control channel.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

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CVE-2023-2033Same product: Debian Debian Linuxboth on KEV
CVE-2023-3079Same product: Debian Debian Linuxboth on KEV
CVE-2023-4762Same product: Debian Debian Linuxboth on KEV
CVE-2018-17480Same product: Debian Debian Linuxboth on KEV
CVE-2024-5274Same product: Fedoraproject Fedoraboth on KEV
CVE-2024-4947Same product: Fedoraproject Fedoraboth on KEV
CVE-2021-30551Same product: Fedoraproject Fedoraboth on KEV
CVE-2017-8291Same product: Debian Debian Linuxboth on KEV
CVE-2017-5070Same product: Google Chromeboth on KEV

Affected Assets

google
chrome
≤ 80.0.3987.122
fedoraproject
fedora
30, 31
redhat
enterprise linux desktop
6.0
redhat
enterprise linux server
6.0
redhat
enterprise linux workstation
6.0
debian
debian linux
10.0, 9.0

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V1.5.2
  • V15.3.5

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 partial match
blocks

Secure SDLC practices directly prevent type-confusion flaws via safe typing, static analysis, and code review while the control itself addresses many additional weaknesses.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.5.14 Information transfer partial match
removes
A.5.15 Access control partial match
removes
A.5.16 Identity management partial match
removes
A.5.17 Authentication information partial match
removes
A.5.18 Access rights partial match
removes
A.8.10 Information deletion partial match
removes

References