CVE-2023-52731 (GCVE-0-2023-52731)

Vulnerability from cvelistv5 – Published: 2024-05-21 15:22 – Updated: 2025-05-04 07:42
VLAI?
Title
fbdev: Fix invalid page access after closing deferred I/O devices
Summary
In the Linux kernel, the following vulnerability has been resolved: fbdev: Fix invalid page access after closing deferred I/O devices When a fbdev with deferred I/O is once opened and closed, the dirty pages still remain queued in the pageref list, and eventually later those may be processed in the delayed work. This may lead to a corruption of pages, hitting an Oops. This patch makes sure to cancel the delayed work and clean up the pageref list at closing the device for addressing the bug. A part of the cleanup code is factored out as a new helper function that is called from the common fb_release().
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 186b89659c4c67cccead52961eab0ca3b23951dc , < 87b9802ca824fcee7915e717e9a60471af62e8e9 (git)
Affected: 56c134f7f1b58be08bdb0ca8372474a4a5165f31 , < f1d91f0e9d5a240a809698d7d9c5a538e7dcc149 (git)
Affected: 56c134f7f1b58be08bdb0ca8372474a4a5165f31 , < 3efc61d95259956db25347e2a9562c3e54546e20 (git)
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    Linux Linux Affected: 5.19
Unaffected: 0 , < 5.19 (semver)
Unaffected: 6.1.13 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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