CVE-2024-7520

HighCVSS 8.8/10Last modified Jun 17, 2026

Description

A type confusion bug in WebAssembly could be leveraged by an attacker to potentially achieve code execution. This vulnerability affects Firefox < 129, Firefox ESR < 128.1, and Thunderbird < 128.1.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-843 CWE-94

Affected software

Vendor	Product	Versions
Mozilla	Firefox	>= unspecified, < 129
Mozilla	Firefox ESR	>= unspecified, < 128.1
Mozilla	Thunderbird	>= unspecified, < 128.1
mozilla	firefox_esr	< 128.1
mozilla	firefox	< 129
mozilla	thunderbird	< 128.1

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1903041Issue Tracking, Permissions Required
https://www.mozilla.org/security/advisories/mfsa2024-33/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-35/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-37/Vendor Advisory

Timeline

Published: Aug 6, 2024
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2024

CVE-2024-75218.8Incomplete WebAssembly exception handing could have led to a use-after-free. This vulnerability affects Firefox < 129, Firefox ESR < 115.14,CVE-2024-75228.8Editor code failed to check an attribute value. This could have led to an out-of-bounds read. This vulnerability affects Firefox < 129, Fire CVE-2024-75238.1A select option could partially obscure security prompts. This could be used by a malicious site to trick a user into granting permissions. CVE-2024-75246.1Firefox adds web-compatibility shims in place of some tracking scripts blocked by Enhanced Tracking Protection. On a site protected by Cont CVE-2024-75258.1It was possible for a web extension with minimal permissions to create a `StreamFilter` which could be used to read and modify the response CVE-2024-75266.5ANGLE failed to initialize parameters which lead to reading from uninitialized memory. This could be leveraged to leak sensitive data from m CVE-2024-75278.8Unexpected marking work at the start of sweeping could have led to a use-after-free. This vulnerability affects Firefox < 129, Firefox ESR <CVE-2024-75288.8Incorrect garbage collection interaction in IndexedDB could have led to a use-after-free. This vulnerability affects Firefox < 129, Firefox CVE-2024-75296.5The date picker could partially obscure security prompts. This could be used by a malicious site to trick a user into granting permissions. CVE-2024-75308.8Incorrect garbage collection interaction could have led to a use-after-free. This vulnerability affects Firefox < 129.CVE-2024-75316.5Calling `PK11_Encrypt()` in NSS using CKM_CHACHA20 and the same buffer for input and output can result in plaintext on an Intel Sandy Bridge CVE-2024-75328.8Out of bounds memory access in ANGLE in Google Chrome prior to 127.0.6533.99 allowed a remote attacker to potentially exploit heap corruptio