CVE-2026-46191
High
Description
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
SeverityHigh
CVSS7.1
Exploit probability—
Product
Linux Kernel
PublishedMay 28, 2026
First seenMay 28, 2026
Weakness typeCWE-125Out-of-bounds read
How to fix
Update
- linux linux_kernel6.6.140, 6.12.90, 6.18.32, 7.0.7 or later
Patches
- git.kernel.org/stable/c/594973a2e54924d8ba31c9faac669fc1ba6fcb80
- git.kernel.org/stable/c/7105d9f1387d63b15c9a860674fc92c959181f2f
- git.kernel.org/stable/c/ab6c34b9829d5de03f1d08a47a2253729a6e7e27
- git.kernel.org/stable/c/b44cc78ff46b96e72d333a3be6aaaa0a14797263
- git.kernel.org/stable/c/e4ef723d8975a2694cc90733a6b888a5e2841842
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 2.6.15 ≤ v < 6.6.140, 6.7 ≤ v < 6.12.90, 6.13 ≤ v < 6.18.32, 6.19 ≤ v < 7.0.7 | 6.6.140, 6.12.90, 6.18.32, 7.0.7 |
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