Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 60b59beafba875aef6d378078bce0baf2287ae14 before 4aab89603b637a2e441b38808c4f6fe7d1184df6; affected 60b59beafba875aef6d378078bce0baf2287ae14 before 4fda0d6b45faad44926dd3e4f55f118d899b2e27; affected 60b59beafba875aef6d378078bce0baf2287ae14 before 2a40f8bc9bb713329f1c35ffc199ee961a7135b0; affected 60b59beafba875aef6d378078bce0baf2287ae14 before 2b53d3a52e8e5403a4f4fb57ac6cad3fd2cb1066; affected 60b59beafba875aef6d378078bce0baf2287ae14 before 25c2b77bc463f29ee71a54b883548baf9386a0db; affected 60b59beafba875aef6d378078bce0baf2287ae14 before a0aafb421dd15e935d81543152617f2742cefa70; affected 60b59beafba875aef6d378078bce0baf2287ae14 before 9ded47ad003f09a94b6a710b5c47f4aa5ceb7429 |
| Linux / Linux | affected 2.6.22; unaffected 0 before 2.6.22; unaffected 5.15.210 through 5.15.*; unaffected 6.1.176 through 6.1.*; unaffected 6.6.140 through 6.6.*; unaffected 6.12.88 through 6.12.*; unaffected 6.18.30 through 6.18.*; unaffected 7.0.4 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/4aab89603b637a2e441b38808c4f6fe7d1184df6
- https://git.kernel.org/stable/c/4fda0d6b45faad44926dd3e4f55f118d899b2e27
- https://git.kernel.org/stable/c/2a40f8bc9bb713329f1c35ffc199ee961a7135b0
- https://git.kernel.org/stable/c/2b53d3a52e8e5403a4f4fb57ac6cad3fd2cb1066
- https://git.kernel.org/stable/c/25c2b77bc463f29ee71a54b883548baf9386a0db
- https://git.kernel.org/stable/c/a0aafb421dd15e935d81543152617f2742cefa70
- https://git.kernel.org/stable/c/9ded47ad003f09a94b6a710b5c47f4aa5ceb7429
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.