CVE-2023-52731
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().
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2023-52731
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2023-52731.html
Vendor advisory: redhat — https://access.redhat.com/errata/RHSA-2024:9315
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| rhel | 9 | fixed | |
| sles | affected | | |
| debian | bookworm | fixed | 6.1.15-1 |
| debian | bullseye | fixed | 0 |
| debian | forky | fixed | 6.1.15-1 |
| debian | sid | fixed | 6.1.15-1 |
| debian | trixie | fixed | 6.1.15-1 |
References
Verify integrity in audit chain (admin only). AS-IS.