What is CVE-2025-40322?

CVE-2025-40322 is a high-severity vulnerability in Linux. CVSS score: 7.1/10. Published 2025-12-08.

How severe is CVE-2025-40322?

High severity. CVSS v3 base score is 7.1 out of 10.

Vulnerability in Linux

CVE-2025-40322

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.

EPSS: 0.002 (7.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H.

Affected products

Linux — versions 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 2.6.12, 0

References

Frequently asked questions

What is CVE-2025-40322?: CVE-2025-40322 is a high-severity vulnerability in Linux. CVSS score: 7.1/10. Published 2025-12-08.
How severe is CVE-2025-40322?: High severity. CVSS v3 base score is 7.1 out of 10.