Memory safety bugs fixed in Firefox 152.0.4

published 2026-06-30 4 mo ago modified 2026-10-25 14 d ago also EUVD-2026-40321

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 37%
public exploits: 0; none known

Memory safety bugs present in Firefox 152.0.3. 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 was fixed in Firefox 152.0.4.

Patch / fix

distros 1

firefox-esr openSUSE Tumbleweed 153.0-1.1
MozillaFirefox openSUSE Tumbleweed 152.0.4-1.1

opensuse advisories openSUSE-SU-2026:11373-1 openSUSE-SU-2026:11229-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-14241 updated 2026-11-04 cvss 7.5

firefox: Memory safety bugs fixed in Firefox 152.0.4

Red Hat Enterprise Linux 6 firefox Red Hat Enterprise Linux 7 firefox Red Hat Enterprise Linux 8 firefox Red Hat Enterprise Linux 9 firefox, firefox-x11 Red Hat Enterprise Linux 10 firefox, rhel10/firefox-flatpak
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 4 mo ago (2026-07-01)

Exploit prediction

0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	7.5	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/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	7.5	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Mozilla Firefox

Classification

Weakness

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-787 Out-of-bounds Write

References

mozilla.org /security/advisories/mfsa2026-62/
vendor-advisory
bugzilla.mozilla.org /buglist.cgi?bug_id=2043241%2C2045514%2C2045576%2C2045623%2C2045765%2C2049409%2C2049840
broken-link
bugzilla.mozilla.org /show_bug.cgi?id=2046814
permissions-required

Sources

CVE List CVE-2026-14241
NVD CVE-2026-14241

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