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TI-2020-12621 Aliases CVE-2020-16009GHSA-m7mf-48hp-5qmr

Out-of-bounds write in Google Chrome

Priority CRITICAL 97Exploited in the wildCWE-787Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-787 and the CVSS impact.

Summary

Inappropriate implementation in V8 in Google Chrome prior to 86.0.4240.183 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Why it matters now

Exploitation Active In CISA KEV since 2021-11-03CISA due date 2022-05-03
EPSS 0.48293 98th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix Fixed Chrome (Google): 86.0.4240.183CefSharp.Common (NuGet): 86.0.241+3 more productsRed Hat: 1 advisory

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Active
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
GoogleChromebefore 86.0.4240.18386.0.4240.183Patch availableCNA
—CefSharp.Common (NuGet)before 86.0.24186.0.241Patch availableGHSA-m7mf-48hp-5qmr
—CefSharp.Wpf (NuGet)before 86.0.24186.0.241Patch availableGHSA-m7mf-48hp-5qmr
—CefSharp.WinForms (NuGet)before 86.0.24186.0.241Patch availableGHSA-m7mf-48hp-5qmr
—CefSharp.Wpf.HwndHost (NuGet)before 86.0.24186.0.241Patch availableGHSA-m7mf-48hp-5qmr
  • Chrome VendorGoogle Affected before 86.0.4240.183 Fixed in 86.0.4240.183 Patch available CNA
  • CefSharp.Common (NuGet) Vendor— Affected before 86.0.241 Fixed in 86.0.241 Patch available GHSA-m7mf-48hp-5qmr
  • CefSharp.Wpf (NuGet) Vendor— Affected before 86.0.241 Fixed in 86.0.241 Patch available GHSA-m7mf-48hp-5qmr
  • CefSharp.WinForms (NuGet) Vendor— Affected before 86.0.241 Fixed in 86.0.241 Patch available GHSA-m7mf-48hp-5qmr
  • CefSharp.Wpf.HwndHost (NuGet) Vendor— Affected before 86.0.241 Fixed in 86.0.241 Patch available GHSA-m7mf-48hp-5qmr

CPE configurations NVD · 11

CPEVersionsRoleVendor
cpe:2.3:a:cefsharp:cefsharp:*:*:*:*:*:*:*:*before 86.0.241Vulnerablecefsharp
cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*before 86.0.4240.183VulnerableGoogle
cpe:2.3:a:microsoft:edge:*:*:*:*:*:*:*:*before 86.0.622.63VulnerableMicrosoft
cpe:2.3:a:microsoft:edge_chromium:*:*:*:*:*:*:*:*before 86.0.4240.183VulnerableMicrosoft
cpe:2.3:a:opensuse:backports_sle:15.0:sp1:*:*:*:*:*:*15.0 sp1VulnerableopenSUSE
cpe:2.3:a:opensuse:backports_sle:15.0:sp2:*:*:*:*:*:*15.0 sp2VulnerableopenSUSE
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*15.1VulnerableopenSUSE
cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*15.2VulnerableopenSUSE
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*32VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*33VulnerableFedoraproject
  • cpe:2.3:a:cefsharp:cefsharp:*:*:*:*:*:*:*:* Versions before 86.0.241 Vulnerable ·cefsharp
  • cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:* Versions before 86.0.4240.183 Vulnerable ·Google
  • cpe:2.3:a:microsoft:edge:*:*:*:*:*:*:*:* Versions before 86.0.622.63 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:edge_chromium:*:*:*:*:*:*:*:* Versions before 86.0.4240.183 Vulnerable ·Microsoft
  • cpe:2.3:a:opensuse:backports_sle:15.0:sp1:*:*:*:*:*:* Versions 15.0 sp1 Vulnerable ·openSUSE
  • cpe:2.3:a:opensuse:backports_sle:15.0:sp2:*:*:*:*:*:* Versions 15.0 sp2 Vulnerable ·openSUSE
  • cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* Versions 15.1 Vulnerable ·openSUSE
  • cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:* Versions 15.2 Vulnerable ·openSUSE
  • cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* Versions 32 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
Show 1 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian

Remediation

  • Fix · CNA Chrome (Google) Fixed in 86.0.4240.183
  • Fix · GHSA-m7mf-48hp-5qmr CefSharp.Common (NuGet) Fixed in 86.0.241 Advisory →
  • Fix · GHSA-m7mf-48hp-5qmr CefSharp.Wpf (NuGet) Fixed in 86.0.241 Advisory →
  • Fix · GHSA-m7mf-48hp-5qmr CefSharp.WinForms (NuGet) Fixed in 86.0.241 Advisory →
  • Fix · GHSA-m7mf-48hp-5qmr CefSharp.Wpf.HwndHost (NuGet) Fixed in 86.0.241 Advisory →

Red Hat 1 advisory

  • RHSA-2020:4974 Released 2020-11-09 · Red Hat rating Important
    chromium-browser security update
    • Red Hat Enterprise Linux Desktop Supplementary (v. 6) chromium-browser-86.0.4240.183-1.el6_10
    • Red Hat Enterprise Linux HPC Node Supplementary (v. 6) chromium-browser-86.0.4240.183-1.el6_10
    • Red Hat Enterprise Linux Server Supplementary (v. 6) chromium-browser-86.0.4240.183-1.el6_10
    • Red Hat Enterprise Linux Workstation Supplementary (v. 6) chromium-browser-86.0.4240.183-1.el6_10

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Google Chrome — openSUSE-SU-2020:1829

    39 records Highest priority Priority CRITICAL 2 CRITICAL, 24 MEDIUM, 13 LOW

    Other records, highest priority first

    • TI-2020-12611 Buffer overflow in Google ChromePriority CRITICAL 98
    • TI-2020-12623 Out-of-bounds write in Google ChromePriority MEDIUM 46
    • TI-2020-12584 Use after free in Google ChromePriority MEDIUM 43
    Show all 39 records → Advisory →
  • Advisory ·

    Google Chrome — FEDORA-2020-4e8e48da22

    36 records Highest priority Priority CRITICAL 1 CRITICAL, 23 MEDIUM, 12 LOW

    Other records, highest priority first

    Show all 36 records → Advisory →
Show 2 more groups
  • Advisory ·

    Google Chrome — openSUSE-SU-2020:1831

    7 records Highest priority Priority CRITICAL 1 CRITICAL, 5 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2020-12623 Out-of-bounds write in Google ChromePriority MEDIUM 46
    • TI-2020-12618 Out-of-bounds write in Google ChromePriority MEDIUM 41
    • TI-2020-12617 Improper handling of exceptional conditions in Google ChromePriority MEDIUM 41
    Show all 7 records → Advisory →
  • Advisory ·

    Google Chrome — GLSA-202011-12

    6 records Highest priority Priority CRITICAL 2 CRITICAL, 4 MEDIUM

    Other records, highest priority first

    • TI-2020-12611 Buffer overflow in Google ChromePriority CRITICAL 98
    • TI-2020-12618 Out-of-bounds write in Google ChromePriority MEDIUM 41
    • TI-2020-12617 Improper handling of exceptional conditions in Google ChromePriority MEDIUM 41
    Show all 6 records → Advisory →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux Desktop Supplementary (v. 6)Fixed RHSA-2020:4974
Red Hat Enterprise Linux HPC Node Supplementary (v. 6)Fixed RHSA-2020:4974
Red Hat Enterprise Linux Server Supplementary (v. 6)Fixed RHSA-2020:4974
Red Hat Enterprise Linux Workstation Supplementary (v. 6)Fixed RHSA-2020:4974

Timeline

  1. 2021-11-03 Added to CISA KEV
  2. 2026-10-02 Threatist record created from CVE-2020-16009
  3. 2026-10-03 Alias added: GHSA-m7mf-48hp-5qmr

References

Exploit 2

Advisory 8

Other 4

  • TI-2025-09686 Type confusion in Google Chrome KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-07390 Type confusion in Google Chrome KEVCVSS 3.1CRITICAL 9.6
  • TI-2024-04898 Type confusion in Google Chrome KEVCVSS 3.1CRITICAL 9.6
  • TI-2024-04600 Type confusion in Google Chrome KEVCVSS 3.1CRITICAL 9.6
  • TI-2024-04346 Use after free in Google Chrome KEVCVSS 3.1CRITICAL 9.6
  • TI-2023-05824 Integer overflow in Google Chrome KEVCVSS 3.1CRITICAL 9.6
See all 7586 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences