Local privilege escalation via unaligned request buffer
Published Dec 8, 2025 · Updated Feb 26, 2026
Out-of-bounds write in Android kernel pKVM allows local users to escalate privileges through a malformed hypervisor request buffer. init_pkvm_hyp_vcpu accepts a host-supplied hyp_reqs pointer without enforcing page alignment, so the shared request buffer can spill into an adjacent page. A low-privileged local user can exploit the flaw without user interaction; the resulting kernel memory corruption grants elevated privileges.
Summary
What happened
Out-of-bounds write in Android kernel pKVM allows local users to escalate privileges through a malformed hypervisor request buffer. init_pkvm_hyp_vcpu accepts a host-supplied hyp_reqs pointer without enforcing page alignment, so the shared request buffer can spill into an adjacent page. A low-privileged local user can exploit the flaw without user interaction; the resulting kernel memory corruption grants elevated privileges.
The record
- CVE
- CVE-2025-48623
- Published
- Dec 8, 2025
- Updated
- Feb 26, 2026
- Vendor
- Google Cloud
- Product
- Android
- Classifications
- CWE-787, CWE-20, T1404
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Dec 8, 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?
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- Affected versionversion=Android kernel
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.
Weakness, pattern, technique
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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