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Fencer Vulns
high 8.8

CVE-2021-30547 json

Out of bounds write in ANGLE in Google Chrome prior to 91.0.4472.101 allowed a remote attacker to potentially perform out of bounds memory…

published 2021-06-15 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-17468

cvss
8.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.6%
EPSS 3.6% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

Out of bounds write in ANGLE in Google Chrome prior to 91.0.4472.101 allowed a remote attacker to potentially perform out of bounds memory access via a crafted HTML page.

Patch / fix

  • Google Chrome 91.0.4472.101
  • chromium Debian 14, Debian 13, Debian 12 93.0.4577.82-1
  • firefox-esr Debian 14, Debian 13, Debian 12 78.12.0esr-1
  • thunderbird Debian 14, Debian 13, Debian 12 1:78.12.0-1

debian advisories DEBIAN-CVE-2021-30547

  • firefox Ubuntu 18.04 LTS 90.0+build1-0ubuntu0.18.04.1
  • firefox Ubuntu 20.04 LTS 90.0+build1-0ubuntu0.20.04.1
  • thunderbird Ubuntu 18.04 LTS 1:78.13.0+build1-0ubuntu0.18.04.1
  • thunderbird Ubuntu 20.04 LTS 1:78.13.0+build1-0ubuntu0.20.04.2
  • chromium-browser Ubuntu 18.04 LTS 91.0.4472.101-0ubuntu0.18.04.1

ubuntu advisories UBUNTU-CVE-2021-30547

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • thunderbird RHEL 7 78.12.0-2.el7_9
  • thunderbird RHEL 8 78.12.0-3.el8_4
  • firefox RHEL 7 78.12.0-1.el7_9
  • firefox RHEL 8 78.12.0-1.el8_4
  • thunderbird RHEL 8.2 EUS 78.12.0-2.el8_2
  • thunderbird RHEL 8.1 EUS 78.12.0-2.el8_1
  • firefox RHEL 8.2 EUS 78.12.0-1.el8_2
  • firefox RHEL 8.1 EUS 78.12.0-1.el8_1

red hat advisories RHSA-2021:2914RHSA-2021:2881RHSA-2021:2882RHSA-2021:2883RHSA-2021:2742RHSA-2021:2741

  • MozillaFirefox SLES for SAP 15 SP1, SLES for SAP 15, SLES 15-LTSS +10 more 78.12.0-3.147.1
  • MozillaThunderbird SLE Workstation Extension 15 SP3, SLE Workstation Extension 15 SP2 78.12.0-8.33.1
  • MozillaFirefox SLE Module for Desktop Applications 15 SP3, SLE Module for Desktop Applications 15 SP2 78.12.0-8.46.1
  • MozillaFirefox SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +11 more 78.12.0-112.65.1
  • MozillaFirefox SLES 11 SP4-LTSS 78.12.0-78.134.1

suse advisories SUSE-SU-2021:2478-1SUSE-SU-2021:2458-1SUSE-SU-2021:2393-1SUSE-SU-2021:2389-1SUSE-SU-2021:14766-1

  • firefox-esr openSUSE Tumbleweed 128.5.1-1.1
  • MozillaFirefox openSUSE Tumbleweed 92.0-1.2
  • MozillaThunderbird openSUSE Tumbleweed 91.1.1-1.1
  • chromium openSUSE Tumbleweed 93.0.4577.82-1.1
  • chromium openSUSE Tumbleweed 113.0.5672.92-1.1
  • opera openSUSE Leap 15.4 NonFree 85.0.4341.28-lp154.2.5.1
  • MozillaThunderbird openSUSE Leap 15.2 78.12.0-lp152.2.48.2
  • MozillaThunderbird openSUSE Leap 15.3 78.12.0-8.33.1

opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:10600-1openSUSE-SU-2024:10601-1openSUSE-SU-2024:10681-1openSUSE-SU-2024:12948-1openSUSE-SU-2022:0110-1

  • thunderbird Rocky Linux 8 78.12.0-3.el8_4
  • firefox Rocky Linux 8 78.12.0-1.el8_4

rocky linux advisories RLSA-2021:2883RLSA-2021:2743

  • firefox Alpine 3.23, Alpine 3.22, Alpine 3.21 +6 more 90.0-r0
  • chromium Alpine 3.24, Alpine 3.23, Alpine 3.22 +8 more 91.0.4472.101-r0
  • librewolf Alpine 3.24, Alpine 3.23, Alpine 3.22 +1 more 90.0-r0
  • firefox-esr Alpine 3.23, Alpine 3.22, Alpine 3.21 +8 more 78.12.0-r0
  • thunderbird Alpine 3.23, Alpine 3.22, Alpine 3.21 +5 more 91.3.2-r0
  • qt5-qtwebengine Alpine 3.14 5.15.3_git20211006-r0
  • qt5-qtwebengine Alpine 3.23, Alpine 3.22, Alpine 3.21 +6 more 5.15.3_git20210510-r4

alpine advisories ALPINE-CVE-2021-30547

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • chromium Arch Linux 91.0.4472.101-1
  • vivaldi Arch Linux 4.0.2312.25-1
  • firefox Arch Linux 90.0-1
  • thunderbird Arch Linux 78.12.0-1

arch linux advisories AVG-2057AVG-2058AVG-2148AVG-2152

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-30547 updated cvss 8.8

chromium-browser: Out of bounds write in ANGLE

  • Red Hat Enterprise Linux 6 firefox, thunderbird
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux AppStream (v. 8) firefox 78.12.0-1.el8_4, thunderbird 78.12.0-3.el8_4
    fixed: vendor fix RHSA-2021:2743
  • Red Hat Enterprise Linux AppStream EUS (v. 8.1) firefox 78.12.0-1.el8_1, thunderbird 78.12.0-2.el8_1
    fixed: vendor fix RHSA-2021:2740
  • Red Hat Enterprise Linux AppStream EUS (v. 8.2) firefox 78.12.0-1.el8_2, thunderbird 78.12.0-2.el8_2
    fixed: vendor fix RHSA-2021:2742
  • Red Hat Enterprise Linux Client (v. 7) firefox 78.12.0-1.el7_9, thunderbird 78.12.0-2.el7_9 Red Hat Enterprise Linux Client Optional (v. 7) firefox 78.12.0-1.el7_9 Red Hat Enterprise Linux Server (v. 7) firefox 78.12.0-1.el7_9 Red Hat Enterprise Linux Server Optional (v. 7) firefox 78.12.0-1.el7_9, thunderbird 78.12.0-2.el7_9 Red Hat Enterprise Linux Workstation (v. 7) firefox 78.12.0-1.el7_9, thunderbird 78.12.0-2.el7_9 Red Hat Enterprise Linux Workstation Optional (v. 7) firefox 78.12.0-1.el7_9
    fixed: vendor fix RHSA-2021:2741

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.61% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

  • Google Chrome

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.