CVE-2025-14323 — NULL Pointer Dereference in Mozilla Firefox

CWE-476 — NULL Pointer Dereference14 documents10 sources
Severity
8.8HIGHNVD
EPSS
0.1%
top 77.27%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Mozilla ThunderbirdMozilla Firefox
Timeline
PublishedDec 9
Latest updateFeb 2

Description

Privilege escalation in the DOM: Notifications component. This vulnerability was fixed in Firefox 146, Firefox ESR 115.31, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitability: 2.8 | Impact: 5.9

Affected Packages3 packages

▶NVDmozilla/firefox116.0 — 140.6.0+2
▶NVDmozilla/thunderbird< 140.6.0+1
▶Debianmozilla/thunderbird< 1:140.6.0esr-1~deb11u1+3

🔴Vulnerability Details

3
CVEList
Privilege escalation in the DOM: Notifications component↗2025-12-09
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GHSA
GHSA-24pp-jv4q-cp8j: Privilege escalation in the DOM: Notifications component↗2025-12-09
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OSV
CVE-2025-14323: Privilege escalation in the DOM: Notifications component↗2025-12-09
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📋Vendor Advisories

9
Ubuntu
Thunderbird vulnerabilities↗2026-02-02
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Red Hat
firefox: thunderbird: Privilege escalation in the DOM: Notifications component↗2025-12-09
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Debian
CVE-2025-14323: firefox - Privilege escalation in the DOM: Notifications component. This vulnerability aff...↗2025
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Microsoft
A null pointer dereference flaw was found in samba's Winbind service in versions before 4.11.15 before 4.12.9 and before 4.13.1. A local user could use this flaw to crash the winbind service causing d↗2020-10-13
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Mozilla
Mozilla Foundation Security Advisory 2025-95: CVE-2025-14323↗
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🕵️Threat Intelligence

1
Wiz
CVE-2025-14323 Impact, Exploitability, and Mitigation Steps | Wiz↗
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CVE-2025-14323 — NULL Pointer Dereference in Mozilla | cvebase