An attacker was able to perform an out-of-bounds read or write on a JavaScript object by confusing array index sizes. This vulnerability was fixed in Firefox 138.0.4, Firefox ESR 128.10.1, Firefox ESR 115.23.1, Thunderbird 128.10.2, and Thunderbird 138.0.2.
History

Mon, 13 Apr 2026 15:00:00 +0000

Type Values Removed Values Added
Description An attacker was able to perform an out-of-bounds read or write on a JavaScript object by confusing array index sizes. This vulnerability affects Firefox < 138.0.4, Firefox ESR < 128.10.1, Firefox ESR < 115.23.1, Thunderbird < 128.10.2, and Thunderbird < 138.0.2. An attacker was able to perform an out-of-bounds read or write on a JavaScript object by confusing array index sizes. This vulnerability was fixed in Firefox 138.0.4, Firefox ESR 128.10.1, Firefox ESR 115.23.1, Thunderbird 128.10.2, and Thunderbird 138.0.2.
Title firefox: thunderbird: Out-of-bounds access when optimizing linear sums Out-of-bounds access when optimizing linear sums

Mon, 03 Nov 2025 20:30:00 +0000


Fri, 11 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.00039}

epss

{'score': 0.00037}


Tue, 10 Jun 2025 06:45:00 +0000

Type Values Removed Values Added
First Time appeared Redhat rhel Aus
Redhat rhel Tus
CPEs cpe:/a:redhat:rhel_aus:8.2
cpe:/a:redhat:rhel_aus:8.4
cpe:/a:redhat:rhel_aus:8.6
cpe:/a:redhat:rhel_e4s:8.6
cpe:/a:redhat:rhel_e4s:8.8
cpe:/a:redhat:rhel_e4s:9.2
cpe:/a:redhat:rhel_tus:8.6
cpe:/a:redhat:rhel_tus:8.8
Vendors & Products Redhat rhel Aus
Redhat rhel Tus

Fri, 06 Jun 2025 22:00:00 +0000

Type Values Removed Values Added
First Time appeared Redhat rhel Els
CPEs cpe:/o:redhat:rhel_els:7
Vendors & Products Redhat rhel Els

Tue, 03 Jun 2025 06:45:00 +0000

Type Values Removed Values Added
First Time appeared Redhat rhel E4s
Redhat rhel Eus
CPEs cpe:/a:redhat:rhel_e4s:9.0
cpe:/a:redhat:rhel_eus:9.2
cpe:/a:redhat:rhel_eus:9.4
Vendors & Products Redhat rhel E4s
Redhat rhel Eus

Wed, 28 May 2025 14:30:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla
Mozilla firefox
Mozilla thunderbird
CPEs cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*
Vendors & Products Mozilla
Mozilla firefox
Mozilla thunderbird

Tue, 27 May 2025 03:00:00 +0000

Type Values Removed Values Added
Title firefox: Out-of-bounds access when optimizing linear sums firefox: thunderbird: Out-of-bounds access when optimizing linear sums
References

Mon, 26 May 2025 15:15:00 +0000

Type Values Removed Values Added
CPEs cpe:/o:redhat:enterprise_linux:10.0

Thu, 22 May 2025 13:15:00 +0000

Type Values Removed Values Added
Description An attacker was able to perform an out-of-bounds read or write on a JavaScript object by confusing array index sizes. This vulnerability affects Firefox < 138.0.4, Firefox ESR < 128.10.1, and Firefox ESR < 115.23.1. An attacker was able to perform an out-of-bounds read or write on a JavaScript object by confusing array index sizes. This vulnerability affects Firefox < 138.0.4, Firefox ESR < 128.10.1, Firefox ESR < 115.23.1, Thunderbird < 128.10.2, and Thunderbird < 138.0.2.
References

Thu, 22 May 2025 03:00:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:enterprise_linux:8

Wed, 21 May 2025 03:00:00 +0000

Type Values Removed Values Added
Title firefox: Out-of-bounds access when optimizing linear sums
First Time appeared Redhat
Redhat enterprise Linux
CPEs cpe:/a:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
References
Metrics threat_severity

None

threat_severity

Important


Mon, 19 May 2025 19:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 19 May 2025 16:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-125
CWE-787
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}


Sun, 18 May 2025 19:30:00 +0000

Type Values Removed Values Added
Description An attacker was able to perform an out-of-bounds read or write on a JavaScript object by confusing array index sizes. This vulnerability affects Firefox ESR < 115.23.1. An attacker was able to perform an out-of-bounds read or write on a JavaScript object by confusing array index sizes. This vulnerability affects Firefox < 138.0.4, Firefox ESR < 128.10.1, and Firefox ESR < 115.23.1.
References

Sat, 17 May 2025 21:30:00 +0000

Type Values Removed Values Added
Description An attacker was able to perform an out-of-bounds read or write on a JavaScript object by confusing array index sizes. This vulnerability affects Firefox ESR < 115.23.1.
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-04-13T14:25:56.780Z

Reserved: 2025-05-17T19:40:53.416Z

Link: CVE-2025-4919

cve-icon Vulnrichment

Updated: 2025-11-03T20:05:22.225Z

cve-icon NVD

Status : Modified

Published: 2025-05-17T22:15:19.653

Modified: 2026-04-13T15:17:01.630

Link: CVE-2025-4919

cve-icon Redhat

Severity : Important

Publid Date: 2025-05-17T21:07:27Z

Links: CVE-2025-4919 - Bugzilla