CVE-2023-52731
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.24%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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().
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.24% probability · 16th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/3efc61d95259956db25347e2a9562c3e54546e20Patch
- https://git.kernel.org/stable/c/87b9802ca824fcee7915e717e9a60471af62e8e9Patch
- https://git.kernel.org/stable/c/f1d91f0e9d5a240a809698d7d9c5a538e7dcc149Patch
- https://git.kernel.org/stable/c/3efc61d95259956db25347e2a9562c3e54546e20Patch
- https://git.kernel.org/stable/c/87b9802ca824fcee7915e717e9a60471af62e8e9Patch
- https://git.kernel.org/stable/c/f1d91f0e9d5a240a809698d7d9c5a538e7dcc149Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.