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.

Published: 2024-03-22 Last update: 2025-04-01 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-29943 is rated High Risk (76.3/100): CVSS Critical severity, with high exploitation likelihood (EPSS 53.86%, 98th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +2.78% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2024-29943

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-10 51.07% 53.86% +2.78%
2 2026-03-04 40.21% 51.07% +10.86%
3 2026-03-01 — 40.21% —

Full EPSS history (36 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-29943

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2024-29943

OS Trackers for CVE-2024-29943

vendor priority summary link
alpine — CVE-2024-29943: 1 source package rows (firefox); 99 state rows across 2 repos (3.22-community, edge-community); fixed 0, open 99. https://security.alpinelinux.org/vuln/CVE-2024-29943
debian not yet assigned CVE-2024-29943 not yet assigned priority: Debian including 1 source packages (firefox), 1 status rows across 1 suites (sid): resolved 1. https://security-tracker.debian.org/tracker/CVE-2024-29943
gentoo high CVE-2024-29943: 1 GLSA(s) (202407-22), 2 atom(s) (www-client/firefox, www-client/firefox-bin); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2024-29943
redhat critical — https://access.redhat.com/security/cve/CVE-2024-29943
suse high CVE-2024-29943 severity important: SUSE including 16 source package names (MozillaFirefox, MozillaFirefox-124.0.1-1.1, …), 35 product×package rows across 9 product lines (SUSE Linux Enterprise Module for Package Hub 15 SP5, SUSE Linux Enterprise Module for Package Hub 15 SP6, … (9 product lines)): Known Not Affected 18, Fixed 9, Will Not Fix 8. https://www.suse.com/security/cve/CVE-2024-29943/
ubuntu medium CVE-2024-29943 medium priority: Ubuntu including 8 source packages (firefox, mozjs102, …), 42 status rows across 6 suites (bionic, focal, jammy, mantic, noble, upstream): DNE 18, ignored 16, not-affected 5, needs-triage 2, released 1. https://ubuntu.com/security/CVE-2024-29943

Affected software / configurations for CVE-2024-29943

Vendor Product Version Raw CPE
mozilla firefox < 124.0.1 cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*

References for CVE-2024-29943

cvelogic Threat Intelligence