Uninitialized memory in the JavaScript Engine component
Published Aug 19, 2025
6.5
MEDIUMCVSS 3.1
EPSS 0.37%
Description
Uninitialized memory in the JavaScript Engine component. This vulnerability was fixed in Firefox 142, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird 140.2.
Affected products
No data.
- < 128.14.0
- < 142.0
- ≥ 140.0 · < 140.2.0
- < 128.14.0
- < 142.0
- ≥ 140.0 · < 140.2.0
No data.
Red Hat Enterprise Linux 10
firefox-0:128.14.0-2.el10_0
Fixed · RHSA-2025:14417
Red Hat Enterprise Linux 10
thunderbird-0:128.14.0-3.el10_0
Fixed · RHSA-2025:14844
Red Hat Enterprise Linux 7 Extended Lifecycle Support
firefox-0:128.14.0-2.el7_9
Fixed · RHSA-2025:15430
Red Hat Enterprise Linux 8
firefox-0:128.14.0-2.el8_10
Fixed · RHSA-2025:14442
Red Hat Enterprise Linux 8
thunderbird-0:128.14.0-3.el8_10
Fixed · RHSA-2025:14743
Red Hat Enterprise Linux 8.2 Advanced Update Support
firefox-0:128.14.0-2.el8_2
Fixed · RHSA-2025:15418
Red Hat Enterprise Linux 8.2 Advanced Update Support
thunderbird-0:128.14.0-3.el8_2
Fixed · RHSA-2025:15437
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
firefox-0:128.14.0-2.el8_4
Fixed · RHSA-2025:15419
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
thunderbird-0:128.14.0-3.el8_4
Fixed · RHSA-2025:15496
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
firefox-0:128.14.0-2.el8_4
Fixed · RHSA-2025:15419
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
thunderbird-0:128.14.0-3.el8_4
Fixed · RHSA-2025:15496
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
firefox-0:128.14.0-2.el8_6
Fixed · RHSA-2025:15422
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
thunderbird-0:128.14.0-3.el8_6
Fixed · RHSA-2025:15535
Red Hat Enterprise Linux 8.6 Telecommunications Update Service
firefox-0:128.14.0-2.el8_6
Fixed · RHSA-2025:15422
Red Hat Enterprise Linux 8.6 Telecommunications Update Service
thunderbird-0:128.14.0-3.el8_6
Fixed · RHSA-2025:15535
Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
firefox-0:128.14.0-2.el8_6
Fixed · RHSA-2025:15422
Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
thunderbird-0:128.14.0-3.el8_6
Fixed · RHSA-2025:15535
Red Hat Enterprise Linux 8.8 Telecommunications Update Service
firefox-0:128.14.0-2.el8_8
Fixed · RHSA-2025:15424
Red Hat Enterprise Linux 8.8 Telecommunications Update Service
thunderbird-0:128.14.0-3.el8_8
Fixed · RHSA-2025:15438
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
firefox-0:128.14.0-2.el8_8
Fixed · RHSA-2025:15424
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
thunderbird-0:128.14.0-3.el8_8
Fixed · RHSA-2025:15438
Red Hat Enterprise Linux 9
firefox-0:128.14.0-2.el9_6
Fixed · RHSA-2025:14416
Red Hat Enterprise Linux 9
thunderbird-0:128.14.0-3.el9_6
Fixed · RHSA-2025:14640
Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions
firefox-0:128.14.0-2.el9_0
Fixed · RHSA-2025:15420
Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions
thunderbird-0:128.14.0-3.el9_0
Fixed · RHSA-2025:15436
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
firefox-0:128.14.0-2.el9_2
Fixed · RHSA-2025:15421
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
thunderbird-0:128.14.0-3.el9_2
Fixed · RHSA-2025:15435
Red Hat Enterprise Linux 9.4 Extended Update Support
firefox-0:128.14.0-2.el9_4
Fixed · RHSA-2025:15423
Red Hat Enterprise Linux 9.4 Extended Update Support
thunderbird-0:128.14.0-3.el9_4
Fixed · RHSA-2025:15434
Red Hat Enterprise Linux 10
rhel10/firefox-flatpak
Affected
Red Hat Enterprise Linux 10
rhel10/thunderbird-flatpak
Affected
Red Hat Enterprise Linux 6
firefox
Out of support scope
Red Hat Enterprise Linux 6
thunderbird
Out of support scope
Red Hat Enterprise Linux 7
thunderbird
Out of support scope
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 10 | firefox-0:128.14.0-2.el10_0 | Fixed | RHSA-2025:14417 |
| Red Hat Enterprise Linux 10 | thunderbird-0:128.14.0-3.el10_0 | Fixed | RHSA-2025:14844 |
| Red Hat Enterprise Linux 7 Extended Lifecycle Support | firefox-0:128.14.0-2.el7_9 | Fixed | RHSA-2025:15430 |
| Red Hat Enterprise Linux 8 | firefox-0:128.14.0-2.el8_10 | Fixed | RHSA-2025:14442 |
| Red Hat Enterprise Linux 8 | thunderbird-0:128.14.0-3.el8_10 | Fixed | RHSA-2025:14743 |
| Red Hat Enterprise Linux 8.2 Advanced Update Support | firefox-0:128.14.0-2.el8_2 | Fixed | RHSA-2025:15418 |
| Red Hat Enterprise Linux 8.2 Advanced Update Support | thunderbird-0:128.14.0-3.el8_2 | Fixed | RHSA-2025:15437 |
| Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | firefox-0:128.14.0-2.el8_4 | Fixed | RHSA-2025:15419 |
| Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | thunderbird-0:128.14.0-3.el8_4 | Fixed | RHSA-2025:15496 |
| Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | firefox-0:128.14.0-2.el8_4 | Fixed | RHSA-2025:15419 |
| Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | thunderbird-0:128.14.0-3.el8_4 | Fixed | RHSA-2025:15496 |
| Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | firefox-0:128.14.0-2.el8_6 | Fixed | RHSA-2025:15422 |
| Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | thunderbird-0:128.14.0-3.el8_6 | Fixed | RHSA-2025:15535 |
| Red Hat Enterprise Linux 8.6 Telecommunications Update Service | firefox-0:128.14.0-2.el8_6 | Fixed | RHSA-2025:15422 |
| Red Hat Enterprise Linux 8.6 Telecommunications Update Service | thunderbird-0:128.14.0-3.el8_6 | Fixed | RHSA-2025:15535 |
| Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions | firefox-0:128.14.0-2.el8_6 | Fixed | RHSA-2025:15422 |
| Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions | thunderbird-0:128.14.0-3.el8_6 | Fixed | RHSA-2025:15535 |
| Red Hat Enterprise Linux 8.8 Telecommunications Update Service | firefox-0:128.14.0-2.el8_8 | Fixed | RHSA-2025:15424 |
| Red Hat Enterprise Linux 8.8 Telecommunications Update Service | thunderbird-0:128.14.0-3.el8_8 | Fixed | RHSA-2025:15438 |
| Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | firefox-0:128.14.0-2.el8_8 | Fixed | RHSA-2025:15424 |
| Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | thunderbird-0:128.14.0-3.el8_8 | Fixed | RHSA-2025:15438 |
| Red Hat Enterprise Linux 9 | firefox-0:128.14.0-2.el9_6 | Fixed | RHSA-2025:14416 |
| Red Hat Enterprise Linux 9 | thunderbird-0:128.14.0-3.el9_6 | Fixed | RHSA-2025:14640 |
| Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions | firefox-0:128.14.0-2.el9_0 | Fixed | RHSA-2025:15420 |
| Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions | thunderbird-0:128.14.0-3.el9_0 | Fixed | RHSA-2025:15436 |
| Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | firefox-0:128.14.0-2.el9_2 | Fixed | RHSA-2025:15421 |
| Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | thunderbird-0:128.14.0-3.el9_2 | Fixed | RHSA-2025:15435 |
| Red Hat Enterprise Linux 9.4 Extended Update Support | firefox-0:128.14.0-2.el9_4 | Fixed | RHSA-2025:15423 |
| Red Hat Enterprise Linux 9.4 Extended Update Support | thunderbird-0:128.14.0-3.el9_4 | Fixed | RHSA-2025:15434 |
| Red Hat Enterprise Linux 10 | rhel10/firefox-flatpak | Affected | n/a |
| Red Hat Enterprise Linux 10 | rhel10/thunderbird-flatpak | Affected | n/a |
| Red Hat Enterprise Linux 6 | firefox | Out of support scope | n/a |
| Red Hat Enterprise Linux 6 | thunderbird | Out of support scope | n/a |
| Red Hat Enterprise Linux 7 | thunderbird | Out of support scope | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.
References (16)
- https://access.redhat.com/security/cve/CVE-2025-9181 Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1977130 Issue TrackingPermissions Required
- https://bugzilla.redhat.com/show_bug.cgi?id=2389583 Issue Tracking
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-25244 Advisory
- https://lists.debian.org/debian-lts-announce/2025/08/msg00016.html
- https://lists.debian.org/debian-lts-announce/2025/08/msg00018.html
- https://nvd.nist.gov/vuln/detail/CVE-2025-9181
- https://www.cve.org/CVERecord?id=CVE-2025-9181
- https://www.mozilla.org/security/advisories/mfsa2025-64/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-66/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-66/#CVE-2025-9181
- https://www.mozilla.org/security/advisories/mfsa2025-67/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-70/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-71/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-71/#CVE-2025-9181
- https://www.mozilla.org/security/advisories/mfsa2025-72/ Vendor Advisory
Change history (0)
No recorded changes yet.