Kernel warning via uninitialized delayed-work flush
Published Nov 19, 2024 · Updated May 23, 2026
Use-after-free in Linux kernel dm-cache allows local users to trigger a kernel warning by creating a cache with invalid metadata. The cache_create() error path destroys the delayed_work waker before initialization, causing cancel_delayed_work_sync() to flush invalid work state. Reaching the flaw requires local device-mapper control and deliberately corrupted cache metadata; the published behavior is a WARN_ON, not a demonstrated crash.
Summary
What happened
Use-after-free in Linux kernel dm-cache allows local users to trigger a kernel warning by creating a cache with invalid metadata. The cache_create() error path destroys the delayed_work waker before initialization, causing cancel_delayed_work_sync() to flush invalid work state. Reaching the flaw requires local device-mapper control and deliberately corrupted cache metadata; the published behavior is a WARN_ON, not a demonstrated crash.
The record
- CVE
- CVE-2024-50280
- Published
- Nov 19, 2024
- Updated
- May 23, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-416
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Nov 19, 2024CVE publishedPublication date reported by the CVE source.
- May 23, 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=034cbc8d3b47a56acd89453c29632a9c117de09d
- Affected versionversion=2b17026685a270b2beaf1cdd9857fcedd3505c7e <40fac0271c7aedf60d81ed8214e80851e5b26312
- Affected versionversion=2f097dfac7579fd84ff98eb1d3acd41d53a485f3
- Affected versionversion=4.14.303 <4.15
- Affected versionversion=4.19.270 <4.20
- Affected versionversion=4.9.337 <4.10
- Affected versionversion=4d20032dd90664de09f2902a7ea49ae2f7771746
- Affected versionversion=5.10.163 <5.10.237
- Affected versionversion=5.15.87 <5.15.181
- Affected versionversion=5.4.229 <5.5
- Affected versionversion=6.0.18 <6.1
- Affected versionversion=6.1.4 <6.1.117
- Affected versionversion=6.2
- Affected versionversion=6a3e412c2ab131c54945327a7676b006f000a209 <5a754d3c771280f2d06bf8ab716d6a0d36ca256e
- Affected versionversion=6a459d8edbdbe7b24db42a5a9f21e6aa9e00c2aa <135496c208ba26fd68cdef10b64ed7a91ac9a7ff
- Affected versionversion=6a459d8edbdbe7b24db42a5a9f21e6aa9e00c2aa <8cc12dab635333c4ea28e72d7b947be7d0543c2c
- Affected versionversion=6a459d8edbdbe7b24db42a5a9f21e6aa9e00c2aa <aee3ecda73ce13af7c3e556383342b57e6bd0718
- Affected versionversion=6ac4f36910764cb510bafc4c3768544f86ca48ca
- Affected versionversion=993406104d2b28fe470126a062ad37a1e21e792e
- Affected versionversion=d2a0b298ebf83ab6236f66788a3541e91ce75a70 <d154b333a5667b6c1b213a11a41ad7aaccd10c3d
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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