Kernel memory corruption via double-freed V4L2 device
Published Sep 11, 2026 · Updated Sep 11, 2026
Double free in the V4L2 device-registration path in affected Linux kernel releases allows attackers to corrupt kernel memory. On device_register failure, __video_register_device calls put_device, whose release callback frees the video_device structure before the caller performs the API-required video_device_release. The path requires the rare registration failure, after which the same kernel object is freed twice.
Summary
What happened
Double free in the V4L2 device-registration path in affected Linux kernel releases allows attackers to corrupt kernel memory. On device_register failure, __video_register_device calls put_device, whose release callback frees the video_device structure before the caller performs the API-required video_device_release. The path requires the rare registration failure, after which the same kernel object is freed twice.
The record
- CVE
- CVE-2026-89741
- Published
- Sep 11, 2026
- Updated
- Sep 11, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- Unavailable
- Attack vector
- Unavailable
- Privileges
- Unavailable
Timeline
How it unfolded
- Sep 11, 2026CVE publishedPublication date reported by the CVE source.
- Sep 11, 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=2429bb9fad88c8fa84c4956b0a21cf5afe5e92b7 <712ca1cf756de2557a116e0df55791bac0c9f99e
- Affected versionversion=2a934fdb01db6458288fc9386d3d8ceba6dd551a <aad08b5f67d2a8116e1a00bce2611c1513b10bce
- Affected versionversion=2a934fdb01db6458288fc9386d3d8ceba6dd551a <ce792b94e03882108019ba996c1a7c4d4e09be2c
- Affected versionversion=2a934fdb01db6458288fc9386d3d8ceba6dd551a <e7600f5cee5de14065f950807931d6e6d40fb2d7
- Affected versionversion=4451412739ed33a49b34624299394ee575116d0c
- Affected versionversion=5.10.239 <5.11
- Affected versionversion=5.15.186 <5.16
- Affected versionversion=5.4.295 <5.5
- Affected versionversion=6.1.142 <6.2
- Affected versionversion=6.12.35 <6.12.109
- Affected versionversion=6.15.4 <6.16
- Affected versionversion=6.16
- Affected versionversion=6.6.95 <6.7
- Affected versionversion=8b451a9a46f2bfc510e6d5c2492df91647586184
- Affected versionversion=ae7b143e05b36fc69d6571751855946cc45064c6
- Affected versionversion=b6be1f5633eae200af2527e9eeb7f51be5739b0f
- Affected versionversion=e5c8e62ae551e0ad2e15412aa0c57c2856d59677
- Affected versionversion=ee141706e701356dda41c6fed9ee18bf427c28e3
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
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Public exploit references
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Technologies
Your stack
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Your stack
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