Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 7e71fcedfda6f7de18f850a6b36e78d78b04476f; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 70aed03b1d5a5df974f456cdc8eedb213c94bb8b; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 067c694d06040db6f0c65281bb358452ca6d85b9; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 8a6a240f52e14356386030d8958ae8b1761d2325; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 883f7897a25e3ce14a7f274ca4c73f49ac84002a; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before d570c48dd37dbe8fc6875d4461d01a9554ae2560; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 699d926585daa6ec44be556cdc1ab89e5d54557b; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 3b0c406124719b625b1aba431659f5cdc24a982c |
| Linux / Linux | affected 2.6.12; unaffected 0 before 2.6.12; unaffected 4.4.286 through 4.4.*; unaffected 4.9.285 through 4.9.*; unaffected 4.14.249 through 4.14.*; unaffected 4.19.209 through 4.19.*; unaffected 5.4.151 through 5.4.*; unaffected 5.10.71 through 5.10.*; unaffected 5.14.10 through 5.14.*; unaffected 5.15 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/7e71fcedfda6f7de18f850a6b36e78d78b04476f
- https://git.kernel.org/stable/c/70aed03b1d5a5df974f456cdc8eedb213c94bb8b
- https://git.kernel.org/stable/c/067c694d06040db6f0c65281bb358452ca6d85b9
- https://git.kernel.org/stable/c/8a6a240f52e14356386030d8958ae8b1761d2325
- https://git.kernel.org/stable/c/883f7897a25e3ce14a7f274ca4c73f49ac84002a
- https://git.kernel.org/stable/c/d570c48dd37dbe8fc6875d4461d01a9554ae2560
- https://git.kernel.org/stable/c/699d926585daa6ec44be556cdc1ab89e5d54557b
- https://git.kernel.org/stable/c/3b0c406124719b625b1aba431659f5cdc24a982c
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.
- https://git.kernel.org/stable/c/7e71fcedfda6f7de18f850a6b36e78d78b04476f
- https://git.kernel.org/stable/c/70aed03b1d5a5df974f456cdc8eedb213c94bb8b
- https://git.kernel.org/stable/c/067c694d06040db6f0c65281bb358452ca6d85b9
- https://git.kernel.org/stable/c/8a6a240f52e14356386030d8958ae8b1761d2325
- https://git.kernel.org/stable/c/883f7897a25e3ce14a7f274ca4c73f49ac84002a
- https://git.kernel.org/stable/c/d570c48dd37dbe8fc6875d4461d01a9554ae2560
- https://git.kernel.org/stable/c/699d926585daa6ec44be556cdc1ab89e5d54557b
- https://git.kernel.org/stable/c/3b0c406124719b625b1aba431659f5cdc24a982c