vulnerability
Debian: CVE-2025-40322: linux, linux-6.1 -- security update
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 6 | (AV:L/AC:L/Au:S/C:C/I:N/A:C) | Dec 15, 2025 | Dec 15, 2025 | Jan 15, 2026 |
Severity
6
CVSS
(AV:L/AC:L/Au:S/C:C/I:N/A:C)
Published
Dec 15, 2025
Added
Dec 15, 2025
Modified
Jan 15, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: fbdev: bitblit: bound-check glyph index in bit_putcs* bit_putcs_aligned()/unaligned() derived the glyph pointer from the character value masked by 0xff/0x1ff, which may exceed the actual font's glyph count and read past the end of the built-in font array. Clamp the index to the actual glyph count before computing the address. This fixes a global out-of-bounds read reported by syzbot.
Solutions
debian-upgrade-linuxdebian-upgrade-linux-6-1
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