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CVE-2021-21206

Use after free in Blink in Google Chrome prior to 89.0.4389.128 allowed a remote attacker to...

8.8 HighIn KEVFix available

Use after free in Blink in Google Chrome prior to 89.0.4389.128 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

9.31%Up 8.5 points since Apr 27, 2021
90%50%10%1%

What each source reports

NVD Score used 8.8

Use after free in Blink in Google Chrome prior to 89.0.4389.128 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Record
CVE-2021-21206
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0
6.8 MediumAV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness
CWE-416
Updated
2026-11-02
CVE List 8.8

Use after free in Blink in Google Chrome prior to 89.0.4389.128 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Record
CVE-2021-21206
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness
CWE-416
Updated
2026-11-02
EUVDEUVD-2021-8597 8.8

Use after free in Blink in Google Chrome prior to 89.0.4389.128 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Record
EUVD-2021-8597
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-g8g5-f7qq-6h9m 8.8

Use after free in Blink in Google Chrome prior to 89.0.4389.128 allowed a remote attacker to...

Use after free in Blink in Google Chrome prior to 89.0.4389.128 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Record
GHSA-g8g5-f7qq-6h9m
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness
CWE-416
Updated
2026-11-02
CISA KEV No score

Google Chromium Blink Use-After-Free Vulnerability

Google Chromium Blink contains a use-after-free vulnerability that allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.

Record
CVE-2021-21206
Weakness
CWE-416
Updated
2026-11-02
OSVALPINE-CVE-2021-21206 8.8

Use after free in Blink in Google Chrome prior to 89.0.4389.128 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Record
ALPINE-CVE-2021-21206
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-03
Show 8 moreShow less
OSV 8.8

Use after free in Blink in Google Chrome prior to 89.0.4389.128 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Record
CVE-2021-21206
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2021-21206 8.8

Use after free in Blink in Google Chrome prior to 89.0.4389.128 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Record
DEBIAN-CVE-2021-21206
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2021-21206 8.8

Use after free in Blink in Google Chrome prior to 89.0.4389.128 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Record
UBUNTU-CVE-2021-21206
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVopenSUSE-SU-2021:0567-1 No score

Security update for chromium

This update for chromium fixes the following issues:

  • Chromium 89.0.4389.128 (boo#1184700):
    • CVE-2021-21206: Use after free in blink
    • CVE-2021-21220: Insufficient validation of untrusted input in v8 for x86_64
Record
openSUSE-SU-2021:0567-1
Updated
2026-11-02
OSVopenSUSE-SU-2021:0575-1 No score

Security update for chromium

This update for chromium fixes the following issues:

  • Chromium 89.0.4389.128 (boo#1184700):
    • CVE-2021-21206: Use after free in blink
    • CVE-2021-21220: Insufficient validation of untrusted input in v8 for x86_64

This update was imported from the openSUSE:Leap:15.2:Update update project.

Record
openSUSE-SU-2021:0575-1
Updated
2026-11-02
OSVopenSUSE-SU-2021:0712-1 No score

Security update for opera

This update for opera fixes the following issues:

Update to version 76.0.4017.94

  • released on the stable branch

Update to version 76.0.4017.88

  • CHR-8404 Update chromium on desktop-stable-90-4017 to 90.0.4430.85

  • DNA-92219 Add bookmark API supports to the front-end

  • DNA-92409 [MAC] ‘Present now’ options windows appear behind detached window

  • DNA-92615 Capture tab from the tab context menu

  • DNA-92616 Capture tab from Snapshot

  • DNA-92617 Capture tab from image context menu

  • DNA-92652 Opera 76 translations

  • DNA-92680 Make image selector on any page work like bookmarks popup WP2

  • DNA-92707 Crash at void base::ObserverList::AddObserver(class content::PrerenderHost::Observer*)

  • DNA-92710 Autoupdate on macOS 11.3 not working

  • DNA-92711 Make image selector on any page work like bookmarks popup WP3

  • DNA-92730 Make image selector on any page work like bookmarks popup WP4

  • DNA-92761 Make image selector on any page work like bookmarks popup WP5

  • DNA-92776 Make image selector on any page work like bookmarks popup WP6

  • DNA-92862 Make “View pinboards” button work

  • DNA-92906 Provide in-house translations for Cashback strings to Spanish

  • DNA-92908 API collides with oneclick installer

  • The update to chromium 90.0.4430.85 fixes following issues:

    • CVE-2021-21222, CVE-2021-21223, CVE-2021-21224, CVE-2021-21225, CVE-2021-21226
  • Complete Opera 76.0 changelog at: https://blogs.opera.com/desktop/changelog-for-76/

Update to version 75.0.3969.218

  • CHR-8393 Update chromium on desktop-stable-89-3969 to 89.0.4389.128

  • DNA-92113 Windows debug fails to compile opera_components/ipfs/ipfs/ipfs_url_loader_throttle.obj

  • DNA-92198 [Arm] Update signing scripts

  • DNA-92200 [Arm] Create universal packages from two buildsets

  • DNA-92338 [Search tabs] The preview isn’t updated when the tab from another window is closed

  • DNA-92410 [Download popup] Selected item still looks bad in dark mode

  • DNA-92441 Compilation error

  • DNA-92514 Allow to generate universal DMG package from existing universal .tar.xz

  • DNA-92608 Opera 75 crash during rapid workspace switching

  • DNA-92627 Crash at automation::Error::code()

  • DNA-92630 Crash at opera::PremiumExtensionPersistentPrefStorageImpl::IsPremiumExtensionFeatureEnabled()

  • DNA-92648 Amazon icon disappears from Sidebar Extensions section after pressing Hide Amazon button

  • DNA-92681 Add missing string in Japanese

  • DNA-92684 Fix issues with signing multiple bsids

  • DNA-92706 Update repack generation from universal packages

  • DNA-92725 Enable IPFS for all channels

  • The update to chromium 89.0.4389.128 fixes following issues: CVE-2021-21206, CVE-2021-21220

Record
openSUSE-SU-2021:0712-1
Updated
2026-11-02
OSVopenSUSE-SU-2024:10681-1 No score

chromedriver-93.0.4577.82-1.1 on GA media

These are all security issues fixed in the chromedriver-93.0.4577.82-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:10681-1
Updated
2026-11-02
OSVopenSUSE-SU-2024:12948-1 No score

ungoogled-chromium-113.0.5672.92-1.1 on GA media

These are all security issues fixed in the ungoogled-chromium-113.0.5672.92-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:12948-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
chromium
Alpine:v3.14
before 89.0.4389.128-r0
89.0.4389.128-r0
chromium
Alpine:v3.15
before 89.0.4389.128-r0
89.0.4389.128-r0
chromium
Alpine:v3.16
before 89.0.4389.128-r0
89.0.4389.128-r0
chromium
Alpine:v3.17
before 89.0.4389.128-r0
89.0.4389.128-r0
chromium
Alpine:v3.18
before 89.0.4389.128-r0
89.0.4389.128-r0
chromium
Alpine:v3.19
before 89.0.4389.128-r0
89.0.4389.128-r0
chromium
Alpine:v3.20
before 89.0.4389.128-r0
89.0.4389.128-r0
chromium
Alpine:v3.21
before 89.0.4389.128-r0
89.0.4389.128-r0
chromium
Alpine:v3.22
before 89.0.4389.128-r0
89.0.4389.128-r0
chromium
Alpine:v3.23
before 89.0.4389.128-r0
89.0.4389.128-r0
Show 21 moreShow less
Affected packages
PackageAffectedFixed
chromium
Alpine:v3.24
before 89.0.4389.128-r0
89.0.4389.128-r0
qt5-qtwebengine
Alpine:v3.14
before 5.15.3_git20210510-r0
5.15.3_git20210510-r0
qt5-qtwebengine
Alpine:v3.15
before 5.15.3_git20210510-r0
5.15.3_git20210510-r0
qt5-qtwebengine
Alpine:v3.16
before 5.15.3_git20210510-r0
5.15.3_git20210510-r0
qt5-qtwebengine
Alpine:v3.17
before 5.15.3_git20210510-r0
5.15.3_git20210510-r0
qt5-qtwebengine
Alpine:v3.18
before 5.15.3_git20210510-r0
5.15.3_git20210510-r0
qt5-qtwebengine
Alpine:v3.19
before 5.15.3_git20210510-r0
5.15.3_git20210510-r0
qt5-qtwebengine
Alpine:v3.20
before 5.15.3_git20210510-r0
5.15.3_git20210510-r0
qt5-qtwebengine
Alpine:v3.21
before 5.15.3_git20210510-r0
5.15.3_git20210510-r0
qt5-qtwebengine
Alpine:v3.22
before 5.15.3_git20210510-r0
5.15.3_git20210510-r0
qt5-qtwebengine
Alpine:v3.23
before 5.15.3_git20210510-r0
5.15.3_git20210510-r0
chromium
Debian:12
before 90.0.4430.72-1
90.0.4430.72-1
chromium
Debian:13
before 90.0.4430.72-1
90.0.4430.72-1
chromium
Debian:14
before 90.0.4430.72-1
90.0.4430.72-1
chromium-browser
Ubuntu:16.04:LTS
before 90.0.4430.72-0ubuntu0.16.04.1, plus listed versions
45.0.2454.101-0ubuntu1.120147.0.2526.73-0ubuntu1.121847.0.2526.106-0ubuntu1.122148.0.2564.82-0ubuntu1.122248.0.2564.116-0ubuntu1.1229
Show 45 moreShow less
49.0.2623.87-0ubuntu1.123249.0.2623.108-0ubuntu1.123350.0.2661.102-0ubuntu0.16.04.1.123751.0.2704.79-0ubuntu0.16.04.1.124252.0.2743.116-0ubuntu0.16.04.1.125053.0.2785.143-0ubuntu0.16.04.1.125453.0.2785.143-0ubuntu0.16.04.1.125755.0.2883.87-0ubuntu0.16.04.126356.0.2924.76-0ubuntu0.16.04.126857.0.2987.98-0ubuntu0.16.04.127658.0.3029.81-0ubuntu0.16.04.127758.0.3029.96-0ubuntu0.16.04.127958.0.3029.110-0ubuntu0.16.04.128159.0.3071.109-0ubuntu0.16.04.128959.0.3071.109-0ubuntu0.16.04.129160.0.3112.78-0ubuntu0.16.04.129360.0.3112.113-0ubuntu0.16.04.129861.0.3163.79-0ubuntu0.16.04.130061.0.3163.100-0ubuntu0.16.04.130662.0.3202.62-0ubuntu0.16.04.130862.0.3202.75-0ubuntu0.16.04.131362.0.3202.89-0ubuntu0.16.04.131562.0.3202.94-0ubuntu0.16.04.131763.0.3239.84-0ubuntu0.16.04.163.0.3239.132-0ubuntu0.16.04.164.0.3282.119-0ubuntu0.16.04.164.0.3282.140-0ubuntu0.16.04.164.0.3282.167-0ubuntu0.16.04.165.0.3325.181-0ubuntu0.16.04.166.0.3359.139-0ubuntu0.16.04.366.0.3359.181-0ubuntu0.16.04.167.0.3396.99-0ubuntu0.16.04.268.0.3440.75-0ubuntu0.16.04.168.0.3440.106-0ubuntu0.16.04.169.0.3497.81-0ubuntu0.16.04.170.0.3538.67-0ubuntu0.16.04.170.0.3538.77-0ubuntu0.16.04.170.0.3538.110-0ubuntu0.16.04.171.0.3578.80-0ubuntu0.16.04.171.0.3578.98-0ubuntu0.16.04.172.0.3626.119-0ubuntu0.16.04.172.0.3626.121-0ubuntu0.16.04.173.0.3683.75-0ubuntu0.16.04.173.0.3683.86-0ubuntu0.16.04.174.0.3729.169-0ubuntu0.16.04.1
90.0.4430.72-0ubuntu0.16.04.1
chromium-browser
Ubuntu:18.04:LTS
before 90.0.4430.72-0ubuntu0.18.04.1, plus listed versions
61.0.3163.100-0ubuntu1.137862.0.3202.62-0ubuntu0.17.10.138062.0.3202.89-0ubuntu1.138662.0.3202.94-0ubuntu1.138863.0.3239.84-0ubuntu1
Show 45 moreShow less
63.0.3239.108-0ubuntu164.0.3282.119-0ubuntu164.0.3282.140-0ubuntu164.0.3282.167-0ubuntu165.0.3325.146-0ubuntu165.0.3325.181-0ubuntu166.0.3359.139-0ubuntu0.18.04.366.0.3359.181-0ubuntu0.18.04.167.0.3396.99-0ubuntu0.18.04.168.0.3440.75-0ubuntu0.18.04.168.0.3440.106-0ubuntu0.18.04.169.0.3497.81-0ubuntu0.18.04.170.0.3538.67-0ubuntu0.18.04.170.0.3538.77-0ubuntu0.18.04.170.0.3538.110-0ubuntu0.18.04.171.0.3578.80-0ubuntu0.18.04.171.0.3578.98-0ubuntu0.18.04.172.0.3626.119-0ubuntu0.18.04.172.0.3626.121-0ubuntu0.18.04.173.0.3683.75-0ubuntu0.18.04.173.0.3683.86-0ubuntu0.18.04.174.0.3729.169-0ubuntu0.18.04.175.0.3770.90-0ubuntu0.18.04.175.0.3770.142-0ubuntu0.18.04.176.0.3809.87-0ubuntu0.18.04.176.0.3809.100-0ubuntu0.18.04.177.0.3865.90-0ubuntu0.18.04.178.0.3904.70-0ubuntu0.18.04.278.0.3904.97-0ubuntu0.18.04.178.0.3904.108-0ubuntu0.18.04.179.0.3945.79-0ubuntu0.18.04.179.0.3945.130-0ubuntu0.18.04.180.0.3987.87-0ubuntu0.18.04.180.0.3987.149-0ubuntu0.18.04.180.0.3987.163-0ubuntu0.18.04.181.0.4044.122-0ubuntu0.18.04.181.0.4044.138-0ubuntu0.18.04.183.0.4103.61-0ubuntu0.18.04.184.0.4147.105-0ubuntu0.18.04.185.0.4183.83-0ubuntu0.18.04.285.0.4183.121-0ubuntu0.18.04.186.0.4240.75-0ubuntu0.18.04.186.0.4240.198-0ubuntu0.18.04.187.0.4280.66-0ubuntu0.18.04.189.0.4389.82-0ubuntu0.18.04.1
90.0.4430.72-0ubuntu0.18.04.1
chromium
openSUSE:Leap 15.2
From an advisory covering 2 CVEs
before 89.0.4389.128-lp152.2.86.1
89.0.4389.128-lp152.2.86.1
chromium
SUSE:Package Hub 15 SP2
From an advisory covering 2 CVEs
before 89.0.4389.128-bp152.2.71.1
89.0.4389.128-bp152.2.71.1
opera
openSUSE:Leap 15.2 NonFree
From an advisory covering 7 CVEs
before 76.0.4017.94-lp152.2.43.1
76.0.4017.94-lp152.2.43.1
chromium
openSUSE:Tumbleweed
From an advisory covering 1081 CVEs
before 93.0.4577.82-1.1
93.0.4577.82-1.1
chromium
openSUSE:Tumbleweed
From an advisory covering 2310 CVEs
before 113.0.5672.92-1.1
113.0.5672.92-1.1

History

History
RecordedChangedSources
affected
exploitation
affected, aliases, referencesOSV
first indexedCVE List, EUVD, GitHub Advisories, CISA KEV, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-21206 is a high vulnerability (CVSS 8.8) in Google Chrome, published April 17, 2021. CISA lists it as known to be exploited, since November 3, 2021. EUVD reports exploitation since November 3, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 9.31%, the 95th percentile. Fixed in chromium 89.0.4389.128-r0.

References

Show 194 moreShow less
This page doesn't list everything

Left out here: 22 versions and 2,131 references. The JSON record has them.

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