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Red Hat: CVE-2023-52731: kernel: fbdev: Fix invalid page access after closing deferred I/O devices (Multiple Advisories)

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Red Hat: CVE-2023-52731: kernel: fbdev: Fix invalid page access after closing deferred I/O devices (Multiple Advisories)

Severity
4
CVSS
(AV:L/AC:L/Au:M/C:N/I:N/A:C)
Published
05/21/2024
Created
12/06/2024
Added
12/05/2024
Modified
12/05/2024

Description

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().

Solution(s)

  • redhat-upgrade-kernel
  • redhat-upgrade-kernel-rt

References

  • CVE-2023-52731
  • RHSA-2024:9315
  • 查看数 701
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