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Fencer Intel
high 8.8

CVE-2021-4102 kev in the critical feed json

Use after free in V8 in Google Chrome prior to 96.0.4664.110 allowed a remote attacker to potentially exploit heap corruption via a crafted…

published 4y ago modified 4mo ago also EUVD-2021-33987

cvss
8.8
version 3.1, CNA
cisa kev
Exploited
added 2021-12-15
epss
7.8%
EPSS 7.8% chance of exploitation in 30 days, percentile 94%
public exploits
0
none known

Summary

Use after free in V8 in Google Chrome prior to 96.0.4664.110 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Patch / fix

cisa required action Apply updates per vendor instructions.

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

debian advisories DEBIAN-CVE-2021-4102

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

ubuntu advisories UBUNTU-CVE-2021-4102

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

  • chromium Arch Linux 96.0.4664.110-1
  • vivaldi Arch Linux 5.0.2497.30-1

arch linux advisories AVG-2633AVG-2634

Is CVE-2021-4102 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.

Check with Fencer

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-2021-4102 updated cvss 8.8

chromium-browser: Use after free in V8

  • 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

Timeline

  1. Found exploited as a 0-day (Project Zero)
  2. 0-day patched (Project Zero)
  3. Added to CISA KEV
  4. CISA patch deadline
  5. Published
  6. CISA SSVC: exploitation active

Known exploited

Added
4y ago
Patch by
2021-12-29 (4y ago)
Ransomware
Not known
Required action
Apply updates per vendor instructions.
Vendor, product
Google, Chromium V8
CISA name
Google Chromium V8 Use-After-Free Vulnerability

Zero-day

Detected in real attacks while still unknown to the vendor and the public, per Google Project Zero's 0day In-the-Wild tracker.

Found
2021-12-09
Patched
2021-12-13
Details
project zero root cause analysis

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
no
Technical impact
total
Assessed
last yr.

Exploit prediction

7.84% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CISA ADP 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA 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 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.