CVE-2025-8040
published 2025-07-22CVE-2025-8040: Memory safety bugs present in Firefox ESR 140.0, Thunderbird ESR 140.0, Firefox 140 and Thunderbird 140. Some of these bugs showed evidence of memory…
PriorityP347high8.8CVSS 3.1
AVNACLPRNUIRSUCHIHAH
EPSS
0.30%
22.2th percentile
Memory safety bugs present in Firefox ESR 140.0, Thunderbird ESR 140.0, Firefox 140 and Thunderbird 140. 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 141, Firefox ESR 140.1, Thunderbird 141, and Thunderbird 140.1.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | firefox | < firefox 141.0-1 (sid) | firefox 141.0-1 (sid) |
| mozilla | firefox | < 140.1 | 140.1 |
| mozilla | firefox | < 141.0 | 141.0 |
| mozilla | firefox | — | — |
| mozilla | thunderbird | < 140.1 | 140.1 |
| mozilla | thunderbird | < 141.0 | 141.0 |
| mozilla | thunderbird | >= 0 < 1:140.7.1+build1-0ubuntu0.22.04.1 | 1:140.7.1+build1-0ubuntu0.22.04.1 |
CVSS provenance
nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
osv8.8HIGH
vendor_debian8.8HIGH
vendor_redhat8.8HIGH
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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
firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.1, Thunderbird ESR 140.1, Firefox 141 and Thunderbird 141
vendor_redhat·2025-07-22·CVSS 8.8
CVE-2025-8040 [HIGH] CWE-119 firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.1, Thunderbird ESR 140.1, Firefox 141 and Thunderbird 141
firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.1, Thunderbird ESR 140.1, Firefox 141 and Thunderbird 141
Memory safety bugs present in Firefox ESR 140.0, Thunderbird ESR 140.0, Firefox 140 and Thunderbird 140. 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 < 141, Firefox ESR < 140.1, Thunderbird < 141, and Thunderbird < 140.1.
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:
Memory safety bugs present in Firefox ESR 140.0, Thunderbird ESR 140.0, Firefox 140, and Thunderbird 140. Some of these bugs showed evidence of memory corruption, and we presume that wi
Debian
CVE-2025-8040: firefox - Memory safety bugs present in Firefox ESR 140.0, Thunderbird ESR 140.0, Firefox ...
vendor_debian·2025·CVSS 8.8
CVE-2025-8040 [HIGH] CVE-2025-8040: firefox - Memory safety bugs present in Firefox ESR 140.0, Thunderbird ESR 140.0, Firefox ...
Memory safety bugs present in Firefox ESR 140.0, Thunderbird ESR 140.0, Firefox 140 and Thunderbird 140. 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 < 141, Firefox ESR < 140.1, Thunderbird < 141, and Thunderbird < 140.1.
Scope: local
sid: resolved (fixed in 141.0-1)
Mozilla
Mozilla Foundation Security Advisory 2025-61: CVE-2025-8040
vendor_mozilla·CVSS 8.8
CVE-2025-8040 [HIGH] Mozilla Foundation Security Advisory 2025-61: CVE-2025-8040
Mozilla Foundation Security Advisory 2025-61
CVE: CVE-2025-8040
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 141
Mozilla
Mozilla Foundation Security Advisory 2025-56: CVE-2025-8040
vendor_mozilla·CVSS 8.8
CVE-2025-8040 [HIGH] Mozilla Foundation Security Advisory 2025-56: CVE-2025-8040
Mozilla Foundation Security Advisory 2025-56
CVE: CVE-2025-8040
Product: Firefox
Impact: high
Fixed in: Firefox 141
Mozilla
Mozilla Foundation Security Advisory 2025-63: CVE-2025-8040
vendor_mozilla·CVSS 8.8
CVE-2025-8040 [HIGH] Mozilla Foundation Security Advisory 2025-63: CVE-2025-8040
Mozilla Foundation Security Advisory 2025-63
CVE: CVE-2025-8040
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 140.1
Mozilla
Mozilla Foundation Security Advisory 2025-59: CVE-2025-8040
vendor_mozilla·CVSS 8.8
CVE-2025-8040 [HIGH] Mozilla Foundation Security Advisory 2025-59: CVE-2025-8040
Mozilla Foundation Security Advisory 2025-59
CVE: CVE-2025-8040
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 140.1
OSV
CVE-2025-8040: Memory safety bugs present in Firefox ESR 140
osv·2025-07-22·CVSS 8.8
CVE-2025-8040 [HIGH] CVE-2025-8040: Memory safety bugs present in Firefox ESR 140
Memory safety bugs present in Firefox ESR 140.0, Thunderbird ESR 140.0, Firefox 140 and Thunderbird 140. 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 < 141, Firefox ESR < 140.1, Thunderbird < 141, and Thunderbird < 140.1.
GHSA
GHSA-7jcf-w576-jvj3: Memory safety bugs present in Firefox ESR 140
ghsa_unreviewed·2025-07-22
CVE-2025-8040 [HIGH] CWE-119 GHSA-7jcf-w576-jvj3: Memory safety bugs present in Firefox ESR 140
Memory safety bugs present in Firefox ESR 140.0, Thunderbird ESR 140.0, Firefox 140 and Thunderbird 140. 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 < 141, Firefox ESR < 140.1, Thunderbird < 141, and Thunderbird < 140.1.
No detection rules found.
No public exploits indexed.
2025-07-22
Published