8.8

CVE-2021-21157: fedoraproject fedora Use After Free

CVSS: 8.8v3.1HighModified
AliasesUBUNTU-CVE-2021-21157DEBIAN-CVE-2021-21157
Published 22-02-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-21157 is a high (CVSS 8.8) Use After Free vulnerability in fedoraproject fedora. EPSS estimates a 9.46% chance of exploitation in the next 30 days, higher than 95.3% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
47/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (NVD)
EPSS score
9.46%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 9 · Related 7
DSA-4858-1MGASA-2021-0406OPENSUSE-SU-2021:0392-1OPENSUSE-SU-2021:0401-1OPENSUSE-SU-2021:0413-1OPENSUSE-SU-2021:0973-1

Timeline

  1. 22-02-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

Use after free in Web Sockets in Google Chrome on Linux prior to 88.0.4324.182 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

9.46%

Chance of exploitation in the next 30 days

Percentile

95%

Versus all other CVEs

30-day change

0.00 pp

From 9.46% on 20-09-2026

20-09-202620-10-2026
EPSS score
9.46%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (crbug.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Microsoft2 products
Debian1 product
  • chromium< 88.0.4324.182-1
Fedoraproject1 product
Google1 product
  • chrome≥ unspecified, < 88.0.4324.182 | < 88.0.4324.182
Ubuntu1 product
  • chromium-browser< 89.0.4389.82-0ubuntu0.16.04.1 | < 89.0.4389.82-0ubuntu0.18.04.1

5 vendors · 6 products

References

8 links