Local privilege escalation via interior-pointer double-free
Published Dec 30, 2025 · Updated Dec 30, 2025
Memory corruption in the Linux kernel 5.17 through 6.0.6 allows local users to gain kernel privileges by triggering an Adreno a6xx GPU dump. The a6xx crash-state path allocates an object with state_kcalloc(), then adreno_show_object() reallocates and kvfree()s an interior pointer during ASCII85 encoding, corrupting allocator metadata before the containing object is freed again. An unprivileged process must access a DRM render node and trigger a GPU hang or IOVA fault; automatic devcoredump collection can invoke the faulty path, enabling kernel compromise or a panic.
Summary
What happened
Memory corruption in the Linux kernel 5.17 through 6.0.6 allows local users to gain kernel privileges by triggering an Adreno a6xx GPU dump. The a6xx crash-state path allocates an object with state_kcalloc(), then adreno_show_object() reallocates and kvfree()s an interior pointer during ASCII85 encoding, corrupting allocator metadata before the containing object is freed again. An unprivileged process must access a DRM render node and trigger a GPU hang or IOVA fault; automatic devcoredump collection can invoke the faulty path, enabling kernel compromise or a panic.
The record
- CVE
- CVE-2022-50867
- Published
- Dec 30, 2025
- Updated
- Dec 30, 2025
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Dec 30, 2025CVE publishedPublication date reported by the CVE source.
- Dec 30, 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=5.17
- Affected versionversion=b859f9b009bbfbc236d9b076c64c59ccb41b8737 <4b1bbc0571a5d7ee10f754186dc3d619b9ced5c1
- Affected versionversion=b859f9b009bbfbc236d9b076c64c59ccb41b8737 <83d18e9d9c0150d98dc24e3642ea93f5e245322c
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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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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