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Fencer Vulns
critical 9.8

CVE-2022-36320 json

Mozilla developers and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 102.

published 2022-12-22 3 y ago modified 2026-06-17 4 mo ago also EUVD-2022-39036

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 53%
public exploits
0
none known

Summary

Mozilla developers and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 102. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 103.

Patch / fix

  • Mozilla Firefox 103
  • firefox Ubuntu 18.04 LTS 103.0+build1-0ubuntu0.18.04.1
  • firefox Ubuntu 20.04 LTS 103.0+build1-0ubuntu0.20.04.1
  • thunderbird Ubuntu 20.04 LTS 1:102.2.2+build1-0ubuntu0.20.04.1
  • thunderbird Ubuntu 22.04 LTS 1:102.2.2+build1-0ubuntu0.22.04.1

ubuntu advisories UBUNTU-CVE-2022-36320

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

  • firefox-esr openSUSE Tumbleweed 128.5.1-1.1
  • MozillaFirefox openSUSE Tumbleweed 103.0.1-1.1

opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:12227-1

  • firefox Alpine 3.23, Alpine 3.22, Alpine 3.21 +4 more 103.0-r0
  • librewolf Alpine 3.24, Alpine 3.23, Alpine 3.22 +1 more 103.0-r0

alpine advisories ALPINE-CVE-2022-36320

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
18 mo ago

Exploit prediction

0.70% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Mozilla Firefox

Classification

Weakness

References

Sources

Fencer Vulns 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.