Mozilla developers and community members Lukas Bernhard, Gabriele Svelto, Randell Jesup, and the Mozilla Fuzzing Team reported memory safet…

published 2022-12-22 3 y ago modified 2026-06-17 4 mo ago also EUVD-2022-49659

cvss: 8.8; 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 52%
public exploits: 0; none known

Mozilla developers and community members Lukas Bernhard, Gabriele Svelto, Randell Jesup, and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 107. 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 < 108.

Patch / fix

fixed in 1 distros 2

Mozilla Firefox 108

ubuntu opensuse

firefox Ubuntu 18.04 LTS 108.0+build2-0ubuntu0.18.04.1
firefox Ubuntu 20.04 LTS 108.0+build2-0ubuntu0.20.04.1

ubuntu advisories UBUNTU-CVE-2022-46879

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 108.0.1-1.1

opensuse advisories openSUSE-SU-2024:14572-1 openSUSE-SU-2024:12577-1

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 18 mo ago (2025-04-15)

Exploit prediction

0.68% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-08).

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

Affected products

Mozilla Firefox

Classification

Weakness

CWE-787 Out-of-bounds Write

References

security.gentoo.org /glsa/202305-06
vendor-advisory
mozilla.org /security/advisories/mfsa2022-51/
vendor-advisory
bugzilla.mozilla.org /buglist.cgi?bug_id=1736224%2C1793407%2C1794249%2C1795845%2C1797682%2C1797720%2C1798494%2C1799479
broken-link, issue-tracking

Sources

CVE List CVE-2022-46879
NVD CVE-2022-46879

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.

Summary