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.
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Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2024-03-22. NVD baseline CVSS 9.8; sources differ by 0.0.
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.
March 22, 2024
April 1, 2025
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| ubuntu | firefox-mozsymbols (124.0.1+build1-0ubuntu0.20.04.1) @ focal | 2026-05-24 | ubuntu |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
Working exploit code is in the public domain (2 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.
Reproducing CVE-2024-29943 for Windows, based on https://github.com/bjrjk/CVE-2024-29943
Open source ↗A Pwn2Own 2024 SpiderMonkey JIT Bug: From Integer Range Inconsistency to Bound Check Elimination then RCE
Open source ↗Explore the affected products and dependency analysis for CVE-2024-29943
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.
ubuntu · msrc
CWE-787