Tracker / CVE-2025-39967
CVE-2025-39967
In the Linux kernel, the following vulnerability has been resolved: fbcon: fix integer overflow in fbcon_do_set_font Fix integer overflow vulnerabilities in fbcon_do_set_font() where font size calculations could overflow when handling user-controlled font parameters. The vulnerabilities occur when: 1. CALC_FONTSZ(h, pitch, charcount) performs h * pith * charcount multiplication with user-controlled values that can overflow. 2. FONT_EXTRA_WORDS * sizeof(int) + size addition can also overflow 3. This results in smaller allocations than expected, leading to buffer overflows during font data copying. Add explicit overflow checking using check_mul_overflow() and check_add_overflow() kernel helpers to safety validate all size calculations before allocation.
Prodotti e versioni affette
| linux | linux_kernel |
|---|---|
| linux | linux_kernel · 4.14.196 → 4.15 |
| linux | linux_kernel · 4.19.143 → 4.20 |
| linux | linux_kernel · 4.4.235 → 4.5 |
| linux | linux_kernel · 4.9.235 → 4.10 |
| linux | linux_kernel · 5.11 → 5.15.194 |
| linux | linux_kernel · 5.16 → 6.1.155 |
| linux | linux_kernel · 5.4.62 → 5.4.300 |
| linux | linux_kernel · 5.8.6 → 5.9 |
| linux | linux_kernel · 5.9.1 → 5.10.245 |
| linux | linux_kernel · 6.13 → 6.16.10 |
| linux | linux_kernel · 6.2 → 6.6.109 |
| linux | linux_kernel · 6.7 → 6.12.50 |