CVE-2022-49948
High
Description
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.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Linux Kernel
PublishedJun 18, 2025
First seenJun 18, 2025
How to fix
Update
- linux linux_kernel4.9.328, 4.14.293, 4.19.258, 5.4.213, 5.10.142, 5.15.66, 5.19.8 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | v < 4.9.328, 4.10 ≤ v < 4.14.293, 4.15 ≤ v < 4.19.258, 4.20 ≤ v < 5.4.213, 5.5 ≤ v < 5.10.142, 5.11 ≤ v < 5.15.66, 5.16 ≤ v < 5.19.8, 6.0 | 4.9.328, 4.14.293, 4.19.258, 5.4.213, 5.10.142, 5.15.66, 5.19.8 |
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