CVE-2024-29943

An attacker was able to perform an out-of-bounds read or write on a JavaScript object by fooling range-based bounds check elimination. This vulnerability affects Firefox < 124.0.1.

Affected

Mozilla · Firefox

CVSS v3.1 CNA

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

22.93% chance of exploitation in the next 30 days, 98th percentile

Published

2024-03-22

Updated

2025-02-13

Proof-of-concept exploits (4)

• bjrjk/CVE-2024-2994398★ · 2025-02-12
• SneakyNachos/CVE-2024-29943-but-with-wasm1★ · 2026-08-11
• seadragnol/CVE-2024-299432★ · 2025-11-25
• SneakyNachos/CVE-2026-2764-but-with-wasm1★ · 2026-08-11

Security advisories

• https://www.mozilla.org/security/advisories/mfsa2024-15
• http://www.openwall.com/lists/oss-security/2024/03/23/1
• https://bugzilla.mozilla.org/show_bug.cgi?id=1886849

References

• CVE Record
• NVD entry

Related

• CVE-2022-4262
• CVE-2024-4947
• CVE-2024-8381
• CVE-2025-2783
• CVE-2025-5419
• CVE-2026-12295