CVSS 7.1 · High EPSS 0,27%
Kerentanan Out-of-bounds Read pada linux kernel. Skor CVSS 3.1 7.1 (High) menurut NVD.
In the Linux kernel, the following vulnerability has been resolved: tty: Fix out-of-bound vmalloc access in imageblit This issue happens when a userspace program does an ioctl FBIOPUT_VSCREENINFO passing the fb_var_screeninfo struct containing only the fields xres, yres, and bits_per_pixel with values. If this struct is the same as the previous ioctl, the vc_resize() detects it and doesn't call the resize_screen(), leaving the fb_var_screeninfo incomplete. And this leads to the updatescrollmode() calculates a wrong value to fbcon_display->vrows, which makes the real_y() return a wrong value of y, and that value, eventually, causes the imageblit to access an out-of-bound address value. To solve this issue I made the resize_screen() be called even if the screen does not need any resizing, so it will "fix and fill" the fb_var_screeninfo independently.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
· uraikan di kalkulator | Vendor | Produk | Versi terdampak |
|---|---|---|
| linux | linux kernel | Semua versi sebelum 4.4.286 |
| linux | linux kernel | Versi 4.5 hingga sebelum 4.9.285 |
| linux | linux kernel | Versi 4.10 hingga sebelum 4.14.249 |
| linux | linux kernel | Versi 4.15 hingga sebelum 4.19.209 |
| linux | linux kernel | Versi 4.20 hingga sebelum 5.4.151 |
| linux | linux kernel | Versi 5.5 hingga sebelum 5.10.71 |
| linux | linux kernel | Versi 5.11 hingga sebelum 5.14.10 |