CVE-2025-9184
published 2025-08-19CVE-2025-9184: Memory safety bugs present in Firefox ESR 140.1, Thunderbird ESR 140.1, Firefox 141 and Thunderbird 141. Some of these bugs showed evidence of memory…
PriorityP346high8.1CVSS 3.1
AVNACHPRNUINSUCHIHAH
EPSS
0.40%
32.7th percentile
Memory safety bugs present in 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 140.2, Thunderbird 142, and Thunderbird 140.2.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | firefox | < firefox 142.0-1 (sid) | firefox 142.0-1 (sid) |
| mozilla | firefox | < 140.2.0 | 140.2.0 |
| mozilla | firefox | < 142.0 | 142.0 |
| mozilla | firefox | — | — |
| mozilla | thunderbird | < 140.2.0 | 140.2.0 |
| mozilla | thunderbird | < 142.0 | 142.0 |
| mozilla | thunderbird | >= 0 < 1:140.7.1+build1-0ubuntu0.22.04.1 | 1:140.7.1+build1-0ubuntu0.22.04.1 |
CVSS provenance
nvdv3.18.1HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
osv8.1HIGH
vendor_debian8.1HIGH
vendor_redhat8.1HIGH
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Ubuntu
Thunderbird vulnerabilities
vendor_ubuntu·2026-02-02
CVE-2025-8031 Thunderbird vulnerabilities
Title: Thunderbird vulnerabilities
Summary: Several security issues were fixed in Thunderbird.
Multiple security issues were discovered in Thunderbird. If a user were
tricked into opening a specially crafted website in a browsing context,
an attacker could potentially exploit these to cause a denial of service,
obtain sensitive information, bypass security restrictions, cross-site
tracing, or execute arbitrary code.
Instructions: In general, a standard system update will make all the necessary changes.
Red Hat
thunderbird: firefox: Memory safety bugs fixed in Firefox ESR 140.2, Thunderbird ESR 140.2, Firefox 142 and Thunderbird 142
vendor_redhat·2025-08-19·CVSS 8.1
CVE-2025-9184 [HIGH] CWE-119 thunderbird: firefox: Memory safety bugs fixed in Firefox ESR 140.2, Thunderbird ESR 140.2, Firefox 142 and Thunderbird 142
thunderbird: firefox: Memory safety bugs fixed in Firefox ESR 140.2, Thunderbird ESR 140.2, Firefox 142 and Thunderbird 142
Memory safety bugs present in 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 affects Firefox < 142, Firefox ESR < 140.2, Thunderbird < 142, and Thunderbird < 140.2.
A flaw was found in Thunderbird and Firefox. The Mozilla Foundation's Security Advisory describes the following issue:
Memory safety bugs are present in 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 tha
Debian
CVE-2025-9184: firefox - Memory safety bugs present in Firefox ESR 140.1, Thunderbird ESR 140.1, Firefox ...
vendor_debian·2025·CVSS 8.1
CVE-2025-9184 [HIGH] CVE-2025-9184: firefox - Memory safety bugs present in Firefox ESR 140.1, Thunderbird ESR 140.1, Firefox ...
Memory safety bugs present in 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 affects Firefox < 142, Firefox ESR < 140.2, Thunderbird < 142, and Thunderbird < 140.2.
Scope: local
sid: resolved (fixed in 142.0-1)
Mozilla
Mozilla Foundation Security Advisory 2025-70: CVE-2025-9184
vendor_mozilla·CVSS 8.1
CVE-2025-9184 [HIGH] Mozilla Foundation Security Advisory 2025-70: CVE-2025-9184
Mozilla Foundation Security Advisory 2025-70
CVE: CVE-2025-9184
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 142
Mozilla
Mozilla Foundation Security Advisory 2025-72: CVE-2025-9184
vendor_mozilla·CVSS 8.1
CVE-2025-9184 [HIGH] Mozilla Foundation Security Advisory 2025-72: CVE-2025-9184
Mozilla Foundation Security Advisory 2025-72
CVE: CVE-2025-9184
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 140.2
Mozilla
Mozilla Foundation Security Advisory 2025-64: CVE-2025-9184
vendor_mozilla·CVSS 8.1
CVE-2025-9184 [HIGH] Mozilla Foundation Security Advisory 2025-64: CVE-2025-9184
Mozilla Foundation Security Advisory 2025-64
CVE: CVE-2025-9184
Product: Firefox
Impact: high
Fixed in: Firefox 142
Mozilla
Mozilla Foundation Security Advisory 2025-67: CVE-2025-9184
vendor_mozilla·CVSS 8.1
CVE-2025-9184 [HIGH] Mozilla Foundation Security Advisory 2025-67: CVE-2025-9184
Mozilla Foundation Security Advisory 2025-67
CVE: CVE-2025-9184
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 140.2
VulDB
Mozilla Thunderbird up to 141 memory corruption (Nessus ID 258109 / WID-SEC-2025-1866)
vuldb·2026-10-01·CVSS 8.1
CVE-2025-9184 [HIGH] Mozilla Thunderbird up to 141 memory corruption (Nessus ID 258109 / WID-SEC-2025-1866)
A vulnerability, which was classified as critical, has been found in Mozilla Thunderbird up to 141. The impacted element is an unknown function. The manipulation leads to memory corruption.
This vulnerability is uniquely identified as CVE-2025-9184. The attack is possible to be carried out remotely. No exploit exists.
It is advisable to upgrade the affected component.
VulDB
Mozilla Firefox up to 141 memory corruption (Nessus ID 258109 / WID-SEC-2025-1866)
vuldb·2026-10-01·CVSS 8.1
CVE-2025-9184 [HIGH] Mozilla Firefox up to 141 memory corruption (Nessus ID 258109 / WID-SEC-2025-1866)
A vulnerability classified as critical was found in Mozilla Firefox up to 141. The affected element is an unknown function. Executing a manipulation can lead to memory corruption.
This vulnerability is handled as CVE-2025-9184. The attack can be executed remotely. There is not any exploit available.
Upgrading the affected component is advised.
OSV
CVE-2025-9184: Memory safety bugs present in Firefox ESR 140
osv·2025-08-19·CVSS 8.1
CVE-2025-9184 [HIGH] CVE-2025-9184: Memory safety bugs present in Firefox ESR 140
Memory safety bugs present in 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 affects Firefox < 142, Firefox ESR < 140.2, Thunderbird < 142, and Thunderbird < 140.2.
GHSA
GHSA-66r8-wp9q-crp9: Memory safety bugs present in Firefox ESR 140
ghsa_unreviewed·2025-08-19
CVE-2025-9184 [HIGH] CWE-119 GHSA-66r8-wp9q-crp9: Memory safety bugs present in Firefox ESR 140
Memory safety bugs present in 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 affects Firefox < 142, Firefox ESR < 140.2, Thunderbird < 142, and Thunderbird < 140.2.
No detection rules found.
No public exploits indexed.
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1929482%2C1976376%2C1979163%2C1979955https://www.mozilla.org/security/advisories/mfsa2025-64/https://www.mozilla.org/security/advisories/mfsa2025-67/https://www.mozilla.org/security/advisories/mfsa2025-70/https://www.mozilla.org/security/advisories/mfsa2025-72/
2025-08-19
Published