Local kernel oops via NULL parent dereference
Published Dec 24, 2025 · Updated Dec 24, 2025
NULL pointer dereference in the Linux kernel IIO core allows local users to trigger a kernel oops by creating an IIO dummy device. The __iio_device_register function dereferences the parent device while retrieving a firmware-node label without first checking whether that parent is NULL. The trigger requires permission to create entries in the IIO configfs hierarchy with the dummy driver loaded; the oops interrupts device registration and can panic systems configured to panic on oops.
Summary
What happened
NULL pointer dereference in the Linux kernel IIO core allows local users to trigger a kernel oops by creating an IIO dummy device. The __iio_device_register function dereferences the parent device while retrieving a firmware-node label without first checking whether that parent is NULL. The trigger requires permission to create entries in the IIO configfs hierarchy with the dummy driver loaded; the oops interrupts device registration and can panic systems configured to panic on oops.
The record
- CVE
- CVE-2023-54027
- Published
- Dec 24, 2025
- Updated
- Dec 24, 2025
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- T1499.004
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Dec 24, 2025CVE publishedPublication date reported by the CVE source.
- Dec 24, 2025Record updatedLatest update available in the CVE record.
Exploitability
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Is a vulnerable build present?
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- Affected versionversion=5.19
- Affected versionversion=813665564b3d7c74412fe2877520f1d254ce948a <312f04ede209f0a186799fe8e64a19b49700d5dc
- Affected versionversion=813665564b3d7c74412fe2877520f1d254ce948a <a4b34cccff14ce74bb7d77fbfd56e7c9d7c28a97
- Affected versionversion=813665564b3d7c74412fe2877520f1d254ce948a <b2a69969908fcaf68596dfc04369af0fe2e1d2f7
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Weakness, pattern, technique
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Technologies
Your stack
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Your stack
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