VYPR
Unrated severityNVD Advisory· Published Dec 8, 2025· Updated Apr 15, 2026

CVE-2025-40322

CVE-2025-40322

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.

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Affected products

188

Patches

Vulnerability mechanics

References

8

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