CVE-2024-0744Network attack vector

Browser crash via JIT wild-pointer dereference

Published Jan 23, 2024 · Updated Sep 10, 2024

Wild-pointer dereference in Firefox before 122 allows remote attackers to crash the browser through JIT-compiled JavaScript. During an inlined constructor call, the baseline inline cache reloads a spilled ICStubReg after garbage collection clones the stub and updates its frame, causing a stale ICScript pointer read. A crafted JavaScript workload must trigger JIT-code disposal and page reuse during garbage collection; successful exploitation interrupts the browser process.

CVSS severity7.5
High
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Wild-pointer dereference in Firefox before 122 allows remote attackers to crash the browser through JIT-compiled JavaScript. During an inlined constructor call, the baseline inline cache reloads a spilled ICStubReg after garbage collection clones the stub and updates its frame, causing a stale ICScript pointer read. A crafted JavaScript workload must trigger JIT-code disposal and page reuse during garbage collection; successful exploitation interrupts the browser process.

The record

CVE
CVE-2024-0744
Published
Jan 23, 2024
Updated
Sep 10, 2024
Vendor
Mozilla
Product
Firefox
Classifications
CWE-119, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 23, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <122

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mozilla · Firefoxversion=unspecified <122

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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