CVE-2026-46191
published 2026-05-28CVE-2026-46191: In the Linux kernel, the following vulnerability has been resolved: fbcon: Avoid OOB font access if console rotation fails Clear the font buffer if the…
medium5.5
In the Linux kernel, the following vulnerability has been resolved:
fbcon: Avoid OOB font access if console rotation fails
Clear the font buffer if the reallocation during console rotation fails
in fbcon_rotate_font(). The putcs implementations for the rotated buffer
will return early in this case. See [1] for an example.
Currently, fbcon_rotate_font() keeps the old buffer, which is too small
for the rotated font. Printing to the rotated console with a high-enough
character code will overflow the font buffer.
v2:
- fix typos in commit message
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | >= 6cc50e1c5b57180fd37a31282000f43859b0fe73 < 594973a2e54924d8ba31c9faac669fc1ba6fcb80 | 594973a2e54924d8ba31c9faac669fc1ba6fcb80 |
| linux | linux | >= 6cc50e1c5b57180fd37a31282000f43859b0fe73 < ab6c34b9829d5de03f1d08a47a2253729a6e7e27 | ab6c34b9829d5de03f1d08a47a2253729a6e7e27 |
| linux | linux | >= 6cc50e1c5b57180fd37a31282000f43859b0fe73 < 7105d9f1387d63b15c9a860674fc92c959181f2f | 7105d9f1387d63b15c9a860674fc92c959181f2f |
| linux | linux | >= 6cc50e1c5b57180fd37a31282000f43859b0fe73 < b44cc78ff46b96e72d333a3be6aaaa0a14797263 | b44cc78ff46b96e72d333a3be6aaaa0a14797263 |
| linux | linux | >= 6cc50e1c5b57180fd37a31282000f43859b0fe73 < e4ef723d8975a2694cc90733a6b888a5e2841842 | e4ef723d8975a2694cc90733a6b888a5e2841842 |
| linux | linux_kernel | — | — |