CVE-2025-3030 — Use After Free in Mozilla Firefox

CWE-416 — Use After FreeCWE-120 — Classic Buffer Overflow11 documents8 sources
Severity
8.1HIGHNVD
EPSS
0.4%
top 36.97%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Mozilla ThunderbirdMozilla Firefox
Timeline
PublishedApr 1
Latest updateJul 22

Description

Memory safety bugs present in Firefox 136, Thunderbird 136, Firefox ESR 128.8, and Thunderbird 128.8. 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 137, Firefox ESR 128.9, Thunderbird 137, and Thunderbird 128.9.

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 2.2 | Impact: 5.9

Affected Packages3 packages

▶NVDmozilla/firefox< 128.8.0+1
▶NVDmozilla/thunderbird129.0 — 136.0+1
▶Debianmozilla/thunderbird< 1:128.9.0esr-1~deb11u1+3

🔴Vulnerability Details

3
CVEList
Memory safety bugs fixed in Firefox 137, Thunderbird 137, Firefox ESR 128.9, and Thunderbird 128.9↗2025-04-01
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OSV
CVE-2025-3030: Memory safety bugs present in Firefox 136, Thunderbird 136, Firefox ESR 128↗2025-04-01
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GHSA
GHSA-8r77-rxc7-qgvv: Memory safety bugs present in Firefox 136, Thunderbird 136, Firefox ESR 128↗2025-04-01
▶

📋Vendor Advisories

7
Ubuntu
Thunderbird vulnerabilities↗2025-07-22
▶
Red Hat
firefox: thunderbird: Memory safety bugs fixed in Firefox 137, Thunderbird 137, Firefox ESR 128.9, and Thunderbird 128.9↗2025-04-01
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Debian
CVE-2025-3030: firefox - Memory safety bugs present in Firefox 136, Thunderbird 136, Firefox ESR 128.8, a...↗2025
▶
Mozilla
Mozilla Foundation Security Advisory 2025-23: CVE-2025-3030↗
▶
Mozilla
Mozilla Foundation Security Advisory 2025-24: CVE-2025-3030↗
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CVE-2025-3030 — Use After Free in Mozilla Firefox | cvebase