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CVE-2025-1933

Date: March 4, 2025

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.

Severity Score

Related Resources (8)

https://www.mozilla.org/security/advisories/mfsa2025-18/
https://www.mozilla.org/security/advisories/mfsa2025-15/
https://www.mozilla.org/security/advisories/mfsa2025-14/
https://bugzilla.mozilla.org/show_bug.cgi?id=1946004
https://www.mozilla.org/security/advisories/mfsa2025-17/
https://www.mozilla.org/security/advisories/mfsa2025-16/
https://nvd.nist.gov/vuln/detail/CVE-2025-1933
https://www.mend.io/vulnerability-database/CVE-2025-1933

Severity Score

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): LOW
Availability (A): HIGH

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