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CVE-2025-1933

JIT corruption of WASM i32 return values on 64-bit CPUs

Published: Mar 4, 2025Updated: Apr 13, 2026 Sources: CVE List NVD BDUNVD-CWE-noinfo
7.6HIGH
NVD MITRE
EPSS Score
0.3%
Top 79.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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 was fixed in Firefox 136, Firefox ESR 115.21, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:UC:LI:LA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

NVD-CWE-noinfo

Affected Products

Red Hat Enterprise LinuxRed Hat Inc.
On-premOS
Operating Systems / linux-distro
openSUSE TumbleweedNovell Inc.
On-prem
Operating Systems / linux-distro
UbuntuCanonical Ltd.
On-premOS
Operating Systems / linux-distro
Debian GNU/LinuxСообщество свободного программного обеспечения
On-premOS
Operating Systems / linux-distro
РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
red hat inc.commercialUSOperating Systemsaka red hat
novell inc.commercialUSOperating Systems
canonical ltd.commercialGBOperating Systemsaka canonical
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
ооо «ред софт»commercialRUOperating Systemsaka red soft
and 22 more affected products View all →

Exploitability

Official Patch Available
No detection template yetWe can run the check for you — a free external exposure review, no install. Check my exposure

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1946004
bugzilla.mozilla.org
https://www.mozilla.org/security/advisories/mfsa2025-14/
mozilla.org
https://www.mozilla.org/security/advisories/mfsa2025-15/
mozilla.org
and 20 more references View all →

Timeline

Published
Mar 4, 2025
Last Updated
Apr 13, 2026

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