CVE-2025-39967

Katalog CVE

CVSS 7.8 · High EPSS 0,17%

Kerentanan Integer Overflow or Wraparound pada linux kernel. Skor CVSS 3.1 7.8 (High) menurut NVD.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

15 Oktober 2025

Terakhir diubah

30 Juli 2026

Status NVD

Modified

CVSS 3.1

7.8 (High), sumber NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-190: Integer Overflow or Wraparound

EPSS (30 hari)

0,17% peluang dieksploitasi; lebih tinggi dari 5,9% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/stable/c/1a194e6c8e1ee745e914b0b7f50fa86c89ed13fe patch
• https://git.kernel.org/stable/c/4a4bac869560f943edbe3c2b032062f6673b13d3 patch
• https://git.kernel.org/stable/c/994bdc2d23c79087fbf7dcd9544454e8ebcef877 patch
• https://git.kernel.org/stable/c/9c8ec14075c5317edd6b242f1be8167aa1e4e333 patch
• https://git.kernel.org/stable/c/a6eb9f423b3db000aaedf83367b8539f6b72dcfc patch
• https://git.kernel.org/stable/c/adac90bb1aaf45ca66f9db8ac100be16750ace78 patch
• https://git.kernel.org/stable/c/b8a6e85328aeb9881531dbe89bcd2637a06c3c95 patch
• https://git.kernel.org/stable/c/c0c01f9aa08c8e10e10e8c9ebb5be01a4eff6eb7 patch