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Fencer Intel
high 7.4

CVE-2021-4098 json

Insufficient data validation in Mojo in Google Chrome prior to 96.0.4664.110 allowed a remote attacker who had compromised the renderer pro…

published 4y ago modified 4mo ago also EUVD-2021-33983

cvss
7.4
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 51%
public exploits
0
none known

Summary

Insufficient data validation in Mojo in Google Chrome prior to 96.0.4664.110 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page.

Patch / fix

  • Google Chrome 96.0.4664.110
  • chromium Debian 14, Debian 13, Debian 12 97.0.4692.71-0.1

debian advisories DEBIAN-CVE-2021-4098

  • chromium-browser Ubuntu 18.04 LTS 97.0.4692.71-0ubuntu0.18.04.1

ubuntu advisories UBUNTU-CVE-2021-4098

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

  • chromium openSUSE Tumbleweed 96.0.4664.110-1.1
  • chromium openSUSE Tumbleweed 113.0.5672.92-1.1
  • opera openSUSE Leap 15.4 NonFree 85.0.4341.28-lp154.2.5.1
  • opera openSUSE Leap 15.3 NonFree 83.0.4254.27-lp153.2.33.1
  • chromium openSUSE Leap 15.2 96.0.4664.110-lp152.2.143.1
  • chromium Package Hub 15 SP3, openSUSE Leap 15.3 96.0.4664.110-bp153.2.48.1

opensuse advisories openSUSE-SU-2024:11687-1openSUSE-SU-2024:12948-1openSUSE-SU-2022:0110-1openSUSE-SU-2022:0047-1openSUSE-SU-2021:1632-1openSUSE-SU-2021:1600-1

  • qt5-qtwebengine Alpine 3.15 5.15.3_git20211127-r2
  • qt5-qtwebengine Alpine 3.23, Alpine 3.22, Alpine 3.21 +5 more 5.15.3_git20211127-r3

alpine advisories ALPINE-CVE-2021-4098

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 96.0.4664.110-1
  • vivaldi Arch Linux 5.0.2497.30-1

arch linux advisories AVG-2633AVG-2634

Is CVE-2021-4098 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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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-2021-4098 updated cvss 9.6

chromium-browser: Insufficient data validation in Mojo

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

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

0.65% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 7.4 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Affected products

  • Google Chrome

Classification

Weakness
  • CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition
  • CWE-787 Out-of-bounds Write
Technology feeds

References

Sources

Fencer Intel 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.