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CVE-2026-46065 In the Linux kernel, the following vulnerability has been resolved: fbdev: defio: Disconnect deferred I/O from the…
Description
In the Linux kernel, the following vulnerability has been resolved: fbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info Hold state of deferred I/O in struct fb_deferred_io_state. Allocate an instance as part of initializing deferred I/O and remove it only after the final mapping has been closed. If the fb_info and the contained deferred I/O meanwhile goes away, clear struct fb_deferred_io_state.info to invalidate the mapping. Any access will then result in a SIGBUS signal. Fixes a long-standing problem, where a device hot-unplug happens while user space still has an active mapping of the graphics memory. The hot- unplug frees the instance of struct fb_info. Accessing the memory will operate on undefined state.
Produits et versions touchés
| Produit | Versions touchées | Corrigé en |
|---|---|---|
| Linux 7.1 | premières → < 7.1 | 7.1 |
| Linux 7.0 | premières → < 7.0.4 | 7.0.4 |
| Linux 6.18 | premières → < 6.18.30 | 6.18.30 |
| Linux 6.12 | premières → < 6.12.88 | 6.12.88 |
| Linux 6.6 | premières → < 6.6.140 | 6.6.140 |
| Linux 6.1 | premières → < 6.1.176 | 6.1.176 |
| Linux 5.15 | premières → < 5.15.210 | 5.15.210 |
| Linux | 2.6.22 | Pas de correctif indiqué |
| SIMATIC S7-1500 TM MFP - GNU/Linux subsystem | Versions non publiées |
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