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CVE-2021-4062

28
FAUCET Score

CVE-2021-4062 describes a heap buffer overflow vulnerability in Google Chrome's BFCache, affecting versions prior to 96.0.4664.93, as well as various Debian and Fedora distributions. This high-severity flaw (CVSS 8.8) could allow a remote attacker, after compromising the renderer process, to achieve heap corruption and potentially execute arbitrary code by enticing a user to visit a specially crafted HTML page. While the vulnerability has garnered some community discussion and media coverage, there is currently no evidence of active exploitation, nor are public exploits available in Metasploit, Nuclei, or ExploitDB.

Impacted Technologies

VendorProductVersion(s)CPE
< 96.0.4664.93CPE matchmatch criteria
cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
34CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
11.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.42%
Probability of exploitation in next 30 days
EPSS Percentile
70.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0142 is in the 69th percentile among its peer group of 14,875 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

microsoftpatch availablevia msrc
Product: Microsoft Edge (Chromium-based)Fixed in: 96.0.1054.53
googlevendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

microsoft2021-Dec/CVE-2021-4062

Chromium: CVE-2021-4062 Heap buffer overflow in BFCache

Dec 14, 2021

References

chromereleases.googleblog.com / 2021/12/stable-channel-update-for-desktop.html
Vendor Advisory
crbug.com / 1272403
Permissions Required
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/3W46HRT2UVHWSLZB6JZHQF6JNQWKV744
security.gentoo.org / glsa/202208-25
Third Party Advisory
debian.org / security/2022/dsa-5046
Third Party Advisory