Kernel crash via stale deferred-I/O page references
Published May 21, 2024 · Updated Aug 5, 2026
Invalid page access in Linux kernel fbdev 5.19 through 6.1.12 and 6.2 release candidates allows local users to trigger a kernel Oops. The fb_release() path closes a deferred-I/O framebuffer without canceling delayed work or removing dirty-page references, so later work processes stale page entries. Exploitation requires low-privileged local access to open, dirty, and close a framebuffer using deferred I/O; the bounded consequence is page corruption and a kernel Oops, which can interrupt service.
Summary
What happened
Invalid page access in Linux kernel fbdev 5.19 through 6.1.12 and 6.2 release candidates allows local users to trigger a kernel Oops. The fb_release() path closes a deferred-I/O framebuffer without canceling delayed work or removing dirty-page references, so later work processes stale page entries. Exploitation requires low-privileged local access to open, dirty, and close a framebuffer using deferred I/O; the bounded consequence is page corruption and a kernel Oops, which can interrupt service.
The record
- CVE
- CVE-2023-52731
- Published
- May 21, 2024
- Updated
- Aug 5, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-125, T1499.004
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- May 21, 2024CVE publishedPublication date reported by the CVE source.
- Aug 5, 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?
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- Affected versionversion=186b89659c4c67cccead52961eab0ca3b23951dc <87b9802ca824fcee7915e717e9a60471af62e8e9
- Affected versionversion=5.19
- Affected versionversion=56c134f7f1b58be08bdb0ca8372474a4a5165f31 <3efc61d95259956db25347e2a9562c3e54546e20
- Affected versionversion=56c134f7f1b58be08bdb0ca8372474a4a5165f31 <f1d91f0e9d5a240a809698d7d9c5a538e7dcc149
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Public exploit references
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Technologies
Your stack
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Your stack
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