On 64-bit CPUs, when the JIT compiles WASM i32 return values they can pick up bits from left over memory. This can potentially cause them to be treated as a different type. This vulnerability affects Firefox < 136, Firefox ESR < 115.21, Firefox ESR < 128.8, Thunderbird < 136, and Thunderbird < 128.8.

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Rhel Eus Subscribe
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Advisories
Source ID Title
Debian DLA Debian DLA DLA-4078-1 firefox-esr security update
Debian DLA Debian DLA DLA-4081-1 thunderbird security update
Debian DSA Debian DSA DSA-5874-1 firefox-esr security update
Debian DSA Debian DSA DSA-5876-1 thunderbird security update
EUVD EUVD EUVD-2025-7438 On 64-bit CPUs, when the JIT compiles WASM i32 return values they can pick up bits from left over memory. This can potentially cause them to be treated as a different type. This vulnerability affects Firefox < 136, Firefox ESR < 115.21, Firefox ESR < 128.8, Thunderbird < 136, and Thunderbird < 128.8.
Ubuntu USN Ubuntu USN USN-7334-1 Firefox vulnerabilities
Ubuntu USN Ubuntu USN USN-7663-1 Thunderbird vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Mon, 03 Nov 2025 21:30:00 +0000

Type Values Removed Values Added
References

Thu, 03 Apr 2025 13:45:00 +0000

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

Fri, 14 Mar 2025 03:00:00 +0000

Type Values Removed Values Added
First Time appeared Redhat rhel Els
CPEs cpe:/a:redhat:rhel_aus:8.2
cpe:/o:redhat:rhel_els:7
Vendors & Products Redhat rhel Els

Wed, 12 Mar 2025 17:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-252
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H'}

cvssV3_1

{'score': 7.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H'}


Mon, 10 Mar 2025 15:15:00 +0000

Type Values Removed Values Added
First Time appeared Redhat rhel Aus
Redhat rhel E4s
Redhat rhel Eus
Redhat rhel Tus
CPEs cpe:/a:redhat:rhel_aus:8.4
cpe:/a:redhat:rhel_aus:8.6
cpe:/a:redhat:rhel_e4s:8.4
cpe:/a:redhat:rhel_e4s:8.6
cpe:/a:redhat:rhel_e4s:9.0
cpe:/a:redhat:rhel_eus:8.8
cpe:/a:redhat:rhel_eus:9.2
cpe:/a:redhat:rhel_eus:9.4
cpe:/a:redhat:rhel_tus:8.4
cpe:/a:redhat:rhel_tus:8.6
Vendors & Products Redhat rhel Aus
Redhat rhel E4s
Redhat rhel Eus
Redhat rhel Tus

Fri, 07 Mar 2025 02:45:00 +0000

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

Thu, 06 Mar 2025 02:45:00 +0000

Type Values Removed Values Added
First Time appeared Redhat
Redhat enterprise Linux
CPEs cpe:/a:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux

Wed, 05 Mar 2025 03:00:00 +0000

Type Values Removed Values Added
Title firefox: JIT corruption of WASM i32 return values on 64-bit CPUs
Weaknesses CWE-843
References
Metrics threat_severity

None

threat_severity

Important


Wed, 05 Mar 2025 00:00:00 +0000

Type Values Removed Values Added
Description On 64-bit CPUs, when the JIT compiles WASM i32 return values they can pick up bits from left over memory. This can potentially cause them to be treated as a different type. This vulnerability affects Firefox < 136, Firefox ESR < 115.21, and Firefox ESR < 128.8. On 64-bit CPUs, when the JIT compiles WASM i32 return values they can pick up bits from left over memory. This can potentially cause them to be treated as a different type. This vulnerability affects Firefox < 136, Firefox ESR < 115.21, Firefox ESR < 128.8, Thunderbird < 136, and Thunderbird < 128.8.
References

Tue, 04 Mar 2025 16:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-252
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H'}

ssvc

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


Tue, 04 Mar 2025 13:45:00 +0000

Type Values Removed Values Added
Description On 64-bit CPUs, when the JIT compiles WASM i32 return values they can pick up bits from left over memory. This can potentially cause them to be treated as a different type. This vulnerability affects Firefox < 136, Firefox ESR < 115.21, and Firefox ESR < 128.8.
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2025-11-03T20:57:18.028Z

Reserved: 2025-03-04T12:29:32.686Z

Link: CVE-2025-1933

cve-icon Vulnrichment

Updated: 2025-11-03T20:57:18.028Z

cve-icon NVD

Status : Modified

Published: 2025-03-04T14:15:38.170

Modified: 2025-11-03T21:18:53.767

Link: CVE-2025-1933

cve-icon Redhat

Severity : Important

Publid Date: 2025-03-04T13:31:23Z

Links: CVE-2025-1933 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses