Invalid kernel-memory access via Binder VMA race
Published Sep 15, 2025 · Updated Sep 15, 2025
Use-after-free in the Linux kernel Binder driver 4.20 through 5.10.153 allows local users to trigger invalid kernel-memory access. binder_update_page_range accesses alloc->vma while concurrent munmap processing can detach and free that VMA under a downgraded read lock. Concurrent Binder buffer allocation and unmapping are required; the demonstrated consequence is a KASAN-detected invalid read.
Summary
What happened
Use-after-free in the Linux kernel Binder driver 4.20 through 5.10.153 allows local users to trigger invalid kernel-memory access. binder_update_page_range accesses alloc->vma while concurrent munmap processing can detach and free that VMA under a downgraded read lock. Concurrent Binder buffer allocation and unmapping are required; the demonstrated consequence is a KASAN-detected invalid read.
The record
- CVE
- CVE-2022-50240
- Published
- Sep 15, 2025
- Updated
- Sep 15, 2025
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-416, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 15, 2025CVE publishedPublication date reported by the CVE source.
- Sep 15, 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?
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- Affected versionversion=4.20
- Affected versionversion=dd2283f2605e3b3e9c61bcae844b34f2afa4813f <015ac18be7de25d17d6e5f1643cb3b60bfbe859e
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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