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CVE-2021-30563

Type Confusion in V8 in Google Chrome prior to 91.0.4472.164 allowed a remote attacker to...

8.8 HighIn KEVFix available

Type Confusion in V8 in Google Chrome prior to 91.0.4472.164 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

9.00%Up 8.2 points since Aug 4, 2021
90%50%10%1%

What each source reports

NVD Score used 8.8

Type Confusion in V8 in Google Chrome prior to 91.0.4472.164 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Record
CVE-2021-30563
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-843
Updated
2026-11-02
CVE List 8.8

Type Confusion in V8 in Google Chrome prior to 91.0.4472.164 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Record
CVE-2021-30563
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-843
Updated
2026-11-02
EUVDEUVD-2021-17483 8.8

Type Confusion in V8 in Google Chrome prior to 91.0.4472.164 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Record
EUVD-2021-17483
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-m4g6-h6xh-8xr8 8.8

Type Confusion in V8 in Google Chrome prior to 91.0.4472.164 allowed a remote attacker to...

Type Confusion in V8 in Google Chrome prior to 91.0.4472.164 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Record
GHSA-m4g6-h6xh-8xr8
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-843
Updated
2026-11-02
CISA KEV No score

Google Chromium V8 Type Confusion Vulnerability

Google Chromium V8 Engine contains a type confusion 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-2021-30563
Weakness
CWE-122, CWE-843
Updated
2026-11-02
OSVALPINE-CVE-2021-30563 8.8

Type Confusion in V8 in Google Chrome prior to 91.0.4472.164 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Record
ALPINE-CVE-2021-30563
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 11 moreShow less
OSV 8.8

Type Confusion in V8 in Google Chrome prior to 91.0.4472.164 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Record
CVE-2021-30563
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-2021-30563 8.8

Type Confusion in V8 in Google Chrome prior to 91.0.4472.164 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Record
DEBIAN-CVE-2021-30563
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-2021-30563 8.8

Type Confusion in V8 in Google Chrome prior to 91.0.4472.164 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Record
UBUNTU-CVE-2021-30563
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-2021:1073-1 No score

Security update for chromium

This update for chromium fixes the following issues:

Chromium 91.0.4472.164 (boo#1188373)

  • CVE-2021-30559: Out of bounds write in ANGLE
  • CVE-2021-30541: Use after free in V8
  • CVE-2021-30560: Use after free in Blink XSLT
  • CVE-2021-30561: Type Confusion in V8
  • CVE-2021-30562: Use after free in WebSerial
  • CVE-2021-30563: Type Confusion in V8
  • CVE-2021-30564: Heap buffer overflow in WebXR
  • Various fixes from internal audits, fuzzing and other initiatives
Record
openSUSE-SU-2021:1073-1
Updated
2026-11-02
OSVopenSUSE-SU-2021:1074-1 No score

Security update for chromium

This update for chromium fixes the following issues:

Chromium 91.0.4472.164 (boo#1188373)

  • CVE-2021-30559: Out of bounds write in ANGLE
  • CVE-2021-30541: Use after free in V8
  • CVE-2021-30560: Use after free in Blink XSLT
  • CVE-2021-30561: Type Confusion in V8
  • CVE-2021-30562: Use after free in WebSerial
  • CVE-2021-30563: Type Confusion in V8
  • CVE-2021-30564: Heap buffer overflow in WebXR
  • Various fixes from internal audits, fuzzing and other initiatives
Record
openSUSE-SU-2021:1074-1
Updated
2026-11-02
OSVopenSUSE-SU-2021:1095-1 No score

Security update for opera

This update for opera fixes the following issues:

Update to version 77.0.4054.277

  • DNA-94291 Video conference popout doesnt remember its size after resizing
  • DNA-94399 Incorrect icon for wp.pl in address bar dropdown - DNA-94462 Low quality of default wallpaper on windows
  • The update to chromium 91.0.4472.164 fixes following issues: CVE-2021-30541, CVE-2021-30560, CVE-2021-30561, CVE-2021-30562, CVE-2021-30563, CVE-2021-30564
Record
openSUSE-SU-2021:1095-1
Updated
2026-11-02
OSVopenSUSE-SU-2021:1096-1 No score

Security update for opera

This update for opera fixes the following issues:

Update to version 77.0.4054.277:

  • DNA-94291 Video conference popout doesnt remember its size after resizing
  • DNA-94399 Incorrect icon for wp.pl in address bar dropdown
  • DNA-94462 Low quality of default wallpaper on windows
  • The update to chromium 91.0.4472.164 fixes following issues: CVE-2021-30541, CVE-2021-30560, CVE-2021-30561, CVE-2021-30562, CVE-2021-30563, CVE-2021-30564
Record
openSUSE-SU-2021:1096-1
Updated
2026-11-02
OSVopenSUSE-SU-2022:0110-1 No score

Security update for opera

This update for opera fixes the following issues:

Update to 85.0.4341.28

  • CHR-8816 Update chromium on desktop-stable-99-4341 to 99.0.4844.84

  • DNA-98092 Crash at views::MenuItemView::GetMenuController()

  • DNA-98278 Translations for O85

  • DNA-98320 [Mac] Unable to delete recent search entries

  • DNA-98614 Show recent searches for non-BABE users

  • DNA-98615 Allow removal of recent searches

  • DNA-98616 Add recent searches to ‘old’ BABE

  • DNA-98617 Make it possible to disable ad-blocker per-country

  • DNA-98651 Remove Instagram and Facebook Messenger in Russia

  • DNA-98653 Add flag #recent-searches

  • DNA-98696 smoketest PageInfoHistoryDataSourceTest.FormatTimestampString failing

  • DNA-98703 Port Chromium issue 1309225 to Opera Stable

  • The update to chromium 99.0.4844.84 fixes following issues:
    CVE-2022-1096

  • Changes in 85.0.4341.18

    • CHR-8789 Update chromium on desktop-stable-99-4341 to 99.0.4844.51
    • DNA-98059 [Linux] Crash at opera::FreedomSettingsImpl::IsBypassForDotlessDomainsEnabled
    • DNA-98349 [Linux] Crash at bluez::BluezDBusManager::Get()
    • DNA-98126 System crash dialog shown on macOS <= 10.15
    • DNA-98331 [Snap] Meme generator cropping / resizing broken
    • DNA-98394 Audio tab indicator set to 'muted' on videoconferencing sites
    • DNA-98481 Report errors in opauto_collector
  • The update to chromium 99.0.4844.51 fixes following issues: CVE-2022-0789, CVE-2022-0790, CVE-2022-0791, CVE-2022-0792, CVE-2022-0793, CVE-2022-0794, CVE-2022-0795, CVE-2022-0796, CVE-2022-0797, CVE-2022-0798, CVE-2022-0799, CVE-2022-0800, CVE-2022-0801, CVE-2022-0802, CVE-2022-0803, CVE-2022-0804, CVE-2022-0805, CVE-2022-0806, CVE-2022-0807, CVE-2022-0808, CVE-2022-0809

  • Changes in 85.0.4341.13

    • DNA-94119 Upgrade curl to 7.81.0
    • DNA-97849 [Mac monterey] System shortcut interfere with Opera’s ToggleSearchInOpenTabs shortcut
    • DNA-98204 Automatic popout happens when video is paused
    • DNA-98231 Shortcuts are blocked by displayed tab tooltip when triggered quickly after tooltip appears
    • DNA-98321 Add thinlto-cache warnings to suppression list
    • DNA-98395 Promote O85 to stable
  • Complete Opera 85.0 changelog at: https://blogs.opera.com/desktop/changelog-for-85/

  • Update to 84.0.4316.42

    • DNA-94119 Upgrade curl to 7.81.0
    • DNA-98092 Crash at views::MenuItemView::GetMenuController()
    • DNA-98204 Automatic popout happens when video is paused
    • DNA-98231 Shortcuts are blocked by displayed tab tooltip when triggered quickly after tooltip appears
  • Update to 84.0.4316.31

    • CHR-8772 Update chromium on desktop-stable-98-4316 to 98.0.4758.109
    • DNA-97573 [Win][Lin]”Close tab” button is not displayed on tabs playing media when many tabs are open
    • DNA-97729 cancelling the process uploading custom Wallpaper crashes the browser
    • DNA-97871 Google meet tab’s icons don’t fit on pinned tab
    • DNA-97872 Tab is being unpinned when video conferencing button is clicked
    • DNA-98039 Dark theme top sites have black background
    • DNA-98117 Clicking current tab information should hide tooltip
  • Update to 84.0.4316.21

    • CHR-8762 Update chromium on desktop-stable-98-4316 to 98.0.4758.102
    • DNA-97333 ‘Add a site’ label on start page tile barely visible
    • DNA-97691 Opera 84 translations
    • DNA-97767 Wrong string in FR
    • DNA-97855 Crash at ScopedProfileKeepAlive::~ScopedProfileKeepAlive()
    • DNA-97982 Enable #snap-upstream-implementation on all streams
  • The update to chromium 98.0.4758.102 fixes following issues: CVE-2022-0603, CVE-2022-0604, CVE-2022-0605, CVE-2022-0606, CVE-2022-0607, CVE-2022-0608, CVE-2022-0609, CVE-2022-0610

  • Update to 84.0.4316.14

    • CHR-8753 Update chromium on desktop-stable-98-4316 to 98.0.4758.82
    • DNA-97177 Battery saver – the icon looks bad for DPI!=100%
    • DNA-97614 automatic video pop-out for most popular websites broadcasting Winter Olympic Games…
Record
openSUSE-SU-2022:0110-1
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-2024:10977-1 No score

libQt5Pdf5-5.15.6-2.1 on GA media

These are all security issues fixed in the libQt5Pdf5-5.15.6-2.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:10977-1
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 91.0.4472.164-r0
91.0.4472.164-r0
chromium
Alpine:v3.15
before 91.0.4472.164-r0
91.0.4472.164-r0
chromium
Alpine:v3.16
before 91.0.4472.164-r0
91.0.4472.164-r0
chromium
Alpine:v3.17
before 91.0.4472.164-r0
91.0.4472.164-r0
chromium
Alpine:v3.18
before 91.0.4472.164-r0
91.0.4472.164-r0
chromium
Alpine:v3.19
before 91.0.4472.164-r0
91.0.4472.164-r0
chromium
Alpine:v3.20
before 91.0.4472.164-r0
91.0.4472.164-r0
chromium
Alpine:v3.21
before 91.0.4472.164-r0
91.0.4472.164-r0
chromium
Alpine:v3.22
before 91.0.4472.164-r0
91.0.4472.164-r0
chromium
Alpine:v3.23
before 91.0.4472.164-r0
91.0.4472.164-r0
Show 23 moreShow less
Affected packages
PackageAffectedFixed
chromium
Alpine:v3.24
before 91.0.4472.164-r0
91.0.4472.164-r0
qt5-qtwebengine
Alpine:v3.14
before 5.15.3_git20211006-r0
5.15.3_git20211006-r0
qt5-qtwebengine
Alpine:v3.15
before 5.15.3_git20210510-r4
5.15.3_git20210510-r4
qt5-qtwebengine
Alpine:v3.16
before 5.15.3_git20210510-r4
5.15.3_git20210510-r4
qt5-qtwebengine
Alpine:v3.17
before 5.15.3_git20210510-r4
5.15.3_git20210510-r4
qt5-qtwebengine
Alpine:v3.18
before 5.15.3_git20210510-r4
5.15.3_git20210510-r4
qt5-qtwebengine
Alpine:v3.19
before 5.15.3_git20210510-r4
5.15.3_git20210510-r4
qt5-qtwebengine
Alpine:v3.20
before 5.15.3_git20210510-r4
5.15.3_git20210510-r4
qt5-qtwebengine
Alpine:v3.21
before 5.15.3_git20210510-r4
5.15.3_git20210510-r4
qt5-qtwebengine
Alpine:v3.22
before 5.15.3_git20210510-r4
5.15.3_git20210510-r4
qt5-qtwebengine
Alpine:v3.23
before 5.15.3_git20210510-r4
5.15.3_git20210510-r4
chromium
Debian:12
before 93.0.4577.82-1
93.0.4577.82-1
chromium
Debian:13
before 93.0.4577.82-1
93.0.4577.82-1
chromium
Debian:14
before 93.0.4577.82-1
93.0.4577.82-1
chromium-browser
Ubuntu:18.04:LTS
before 92.0.4515.159-0ubuntu0.18.04.1, 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
92.0.4515.159-0ubuntu0.18.04.1
chromium
openSUSE:Leap 15.2
From an advisory covering 7 CVEs
before 91.0.4472.164-lp152.2.113.2
91.0.4472.164-lp152.2.113.2
chromium
SUSE:Package Hub 15 SP3
From an advisory covering 7 CVEs
before 91.0.4472.164-bp153.2.16.1
91.0.4472.164-bp153.2.16.1
chromium
openSUSE:Leap 15.3
From an advisory covering 7 CVEs
before 91.0.4472.164-bp153.2.16.1
91.0.4472.164-bp153.2.16.1
opera
openSUSE:Leap 15.3 NonFree
From an advisory covering 6 CVEs
before 77.0.4054.277-lp153.2.9.1
77.0.4054.277-lp153.2.9.1
opera
openSUSE:Leap 15.2 NonFree
From an advisory covering 6 CVEs
before 77.0.4054.277-lp152.2.55.1
77.0.4054.277-lp152.2.55.1
opera
openSUSE:Leap 15.4 NonFree
From an advisory covering 241 CVEs
before 85.0.4341.28-lp154.2.5.1
85.0.4341.28-lp154.2.5.1
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-2021-30563 is a high vulnerability (CVSS 8.8) in Google Chrome, published July 21, 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 9.00%, the 95th percentile. Fixed in chromium 91.0.4472.164-r0.

References

Show 194 moreShow less
This page doesn't list everything

Left out here: 5 versions, 2,129 references and the rest of 1 source description. The JSON record has them.

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