CVE-2026-46065
published 2026-05-27CVE-2026-46065: 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…
high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
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.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | >= 60b59beafba875aef6d378078bce0baf2287ae14 < 2a40f8bc9bb713329f1c35ffc199ee961a7135b0 | 2a40f8bc9bb713329f1c35ffc199ee961a7135b0 |
| linux | linux | >= 60b59beafba875aef6d378078bce0baf2287ae14 < 2b53d3a52e8e5403a4f4fb57ac6cad3fd2cb1066 | 2b53d3a52e8e5403a4f4fb57ac6cad3fd2cb1066 |
| linux | linux | >= 60b59beafba875aef6d378078bce0baf2287ae14 < 25c2b77bc463f29ee71a54b883548baf9386a0db | 25c2b77bc463f29ee71a54b883548baf9386a0db |
| linux | linux | >= 60b59beafba875aef6d378078bce0baf2287ae14 < a0aafb421dd15e935d81543152617f2742cefa70 | a0aafb421dd15e935d81543152617f2742cefa70 |
| linux | linux | >= 60b59beafba875aef6d378078bce0baf2287ae14 < 9ded47ad003f09a94b6a710b5c47f4aa5ceb7429 | 9ded47ad003f09a94b6a710b5c47f4aa5ceb7429 |
| linux | linux_kernel | — | — |