Browser crash via shutdown ImageBitmap use-after-free
Published Sep 27, 2023 · Updated May 1, 2025
Use-after-free in Firefox before 118 allows attackers to crash the browser through an ImageBitmap created during process shutdown. The shutdown path could create a new ImageBitmapShutdownObserver after that observer had been destroyed, allowing another path to use freed memory. Triggering depends on a narrow, timing-sensitive shutdown phase, and the published consequence is a browser crash rather than demonstrated code execution.
Summary
What happened
Use-after-free in Firefox before 118 allows attackers to crash the browser through an ImageBitmap created during process shutdown. The shutdown path could create a new ImageBitmapShutdownObserver after that observer had been destroyed, allowing another path to use freed memory. Triggering depends on a narrow, timing-sensitive shutdown phase, and the published consequence is a browser crash rather than demonstrated code execution.
The record
- CVE
- CVE-2023-5175
- Published
- Sep 27, 2023
- Updated
- May 1, 2025
- Vendor
- Mozilla
- Product
- Firefox
- Classifications
- CWE-416, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 27, 2023CVE publishedPublication date reported by the CVE source.
- May 1, 2025Record 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.
- Affected versionversion=unspecified <118
What conditions does exploitation require?
What is affected?
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.
Public exploit references
- Mozilla Bugzilla ImageBitmap shutdown reproductionproof of concept · demonstrated
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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