CVE-2022-49948
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.
| Software | From | Fixed in |
|---|---|---|
| linux / linux_kernel | - | 4.9.328 |
| linux / linux_kernel | 4.10 | 4.14.293 |
| linux / linux_kernel | 4.15 | 4.19.258 |
| linux / linux_kernel | 4.20 | 5.4.213 |
| linux / linux_kernel | 5.5 | 5.10.142 |
| linux / linux_kernel | 5.11 | 5.15.66 |
| linux / linux_kernel | 5.16 | 5.19.8 |
| linux / linux_kernel | 6.0-rc1 | 6.0-rc1.x |
| linux / linux_kernel | 6.0-rc2 | 6.0-rc2.x |
| linux / linux_kernel | 6.0-rc3 | 6.0-rc3.x |
- https://git.kernel.org/stable/c/1cf1930369c9dc428d827b60260c53271bff3285
- https://git.kernel.org/stable/c/2535431ae967ad17585513649625fea7db28d4db
- https://git.kernel.org/stable/c/566f9c9f89337792070b5a6062dff448b3e7977f
- https://git.kernel.org/stable/c/989201bb8c00b222235aff04e6200230d29dc7bb
- https://git.kernel.org/stable/c/c555cf04684fde39b5b0dd9fd80730030ee10c4a
- https://git.kernel.org/stable/c/c904fe03c4bd1f356a58797d39e2a5d0ca15cefc
- https://git.kernel.org/stable/c/e9ba4611ddf676194385506222cce7b0844e708e
- https://git.kernel.org/stable/c/f74b4a41c5d7c9522469917e3072e55d435efd9e
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