9.8

CVE-2022-34476: mozilla firefox Improper Input Validation

CVSS: 9.8v3.1CriticalModified
AliasesUBUNTU-CVE-2022-34476
Published 22-12-2022Last modified 15-04-2025
Open JSON

Vulnerability summary

CVE-2022-34476 is a critical (CVSS 9.8) Improper Input Validation vulnerability in mozilla firefox. EPSS estimates a 0.69% chance of exploitation in the next 30 days, higher than 51.9% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.69%
0%100%
Low · -0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 6 · Related 6
OPENSUSE-SU-2024:12184-1OPENSUSE-SU-2024:14572-1SUSE-SU-2022:3272-1SUSE-SU-2022:3273-1SUSE-SU-2022:3396-1USN-5504-1

Timeline

  1. 22-12-2022
    PublishedVulnerability first disclosed.
  2. 15-04-2025
    Last modifiedVulnerability information updated.

Description

ASN.1 parsing of an indefinite SEQUENCE inside an indefinite GROUP could have resulted in the parser accepting malformed ASN.1. This vulnerability affects Firefox < 102.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.69%

Chance of exploitation in the next 30 days

Percentile

52%

Versus all other CVEs

30-day change

-0.01 pp

From 0.70% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.69%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Mozilla1 product
  • firefox≥ unspecified, < 102 | < 102.0
Ubuntu1 product
  • firefox< 102.0+build2-0ubuntu0.18.04.1 | < 102.0+build2-0ubuntu0.20.04.1

2 vendors · 2 products

References

6 links