CVE-2025-9185CWE-119

CVE-2025-9185

High · published August 20, 2025

CVSS v3.1
8.1
EPSS
1%
Percentile
42.6
In the wild
Unconfirmed
What it is

Memory safety bugs present in Firefox ESR 115.26, Firefox ESR 128.13, Thunderbird ESR 128.13, Firefox ESR 140.1, Thunderbird ESR 140.1, Firefox 141 and Thunderbird 141. 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 142, Firefox ESR 115.27, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird 140.2.

The record
Technical detail
CVSS v3.1
8.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00509 · 42.6th percentile
Weakness
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer
Published
2025-08-20T01:15Z
Affected products (7)
ProductVersionsFixed in
mozilla/firefox< 115.27.0115.27.0
mozilla/firefox< 142.0142.0
mozilla/firefox≥ 128.0, < 128.14.0128.14.0
mozilla/firefox≥ 140.0, < 140.2.0140.2.0
mozilla/thunderbird< 128.14.0128.14.0
mozilla/thunderbird< 142.0142.0
mozilla/thunderbird≥ 140.0, < 140.2.0140.2.0
References (10)
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1970154%2C1976782%2C1977166 · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-64/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-65/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-66/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-67/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-70/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-71/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-72/ · [email protected]https://lists.debian.org/debian-lts-announce/2025/08/msg00016.html · af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/08/msg00018.html · af854a3a-2127-422b-91ae-364da2661108
EPSS history
Timeline
  • 19 AUG 20:33Z
    Memory safety bugs fixed in Firefox ESR 115.27, Firefox ESR 128.14, Thunderbird ESR 128.14, Firefox ESR 140.2, Thunderbird ESR 140.2, Firefox 142 and Thunderbird 142
    cvelistv5