High · published June 18, 2025
In the Linux kernel, the following vulnerability has been resolved:
vt: Clear selection before changing the font
When changing the console font with ioctl(KDFONTOP) the new font size
can be bigger than the previous font. A previous selection may thus now
be outside of the new screen size and thus trigger out-of-bounds
accesses to graphics memory if the selection is removed in
vc_do_resize().
Prevent such out-of-memory accesses by dropping the selection before the
various con_font_set() console handlers are called.
| Product | Versions | Fixed in |
|---|---|---|
| linux/linux_kernel | < 4.9.328 | 4.9.328 |
| linux/linux_kernel | ≥ 4.10, < 4.14.293 | 4.14.293 |
| linux/linux_kernel | ≥ 4.15, < 4.19.258 | 4.19.258 |
| linux/linux_kernel | ≥ 4.20, < 5.4.213 | 5.4.213 |
| linux/linux_kernel | ≥ 5.5, < 5.10.142 | 5.10.142 |
| linux/linux_kernel | ≥ 5.11, < 5.15.66 | 5.15.66 |
| linux/linux_kernel | ≥ 5.16, < 5.19.8 | 5.19.8 |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |