Local privilege escalation via Skia allocation overflow
Published Jan 2, 2025 · Updated Feb 26, 2026
An out-of-bounds write in Android 12 through 15 allows local users to elevate privileges through crafted PDF deflate data. The skia_alloc_func zlib allocator in SkDeflate.cpp multiplies item count by item size without checking whether the result fits in size_t, allowing an undersized allocation for zlib's write. A low-privileged local context is required; no user interaction is needed, and successful exploitation grants elevated privileges.
Summary
What happened
An out-of-bounds write in Android 12 through 15 allows local users to elevate privileges through crafted PDF deflate data. The skia_alloc_func zlib allocator in SkDeflate.cpp multiplies item count by item size without checking whether the result fits in size_t, allowing an undersized allocation for zlib's write. A low-privileged local context is required; no user interaction is needed, and successful exploitation grants elevated privileges.
The record
- CVE
- CVE-2024-43768
- Published
- Jan 2, 2025
- Updated
- Feb 26, 2026
- Vendor
- Google Cloud
- Product
- Android
- Classifications
- CWE-787, T1404
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jan 2, 2025CVE publishedPublication date reported by the CVE source.
- Feb 26, 2026Record 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=12
- Affected versionversion=12L
- Affected versionversion=13
- Affected versionversion=14
- Affected versionversion=15
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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