High 7.1Published Dec 7, 2025

CVE-2025-40322fbdev: bitblit: bound-check glyph index in bit_putcs*

Updated under an hour ago (Oct 26, 2026, 12:50 AM ET)

Does this affect you?

It affects Linux. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Linux

Exploited in the last 30 days

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.

CVSS: 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Deferred
Record last updated: Aug 5, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before a10cede006f9614b465cf25609a8753efbfd45cc; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 0998a6cb232674408a03e8561dc15aa266b2f53b; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before db5c9a162d2f42bcc842b76b3d935dcc050a0eec; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before c12003bf91fdff381c55ef54fef3e961a5af2545; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 9ba1a7802ca9a2590cef95b253e6526f4364477f; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 901f44227072be60812fe8083e83e1533c04eed1; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before efaf89a75a29b2d179bf4fe63ca62852e93ad620; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 18c4ef4e765a798b47980555ed665d78b71aeadf	CNA record

References

https://git.kernel.org/stable/c/a10cede006f9614b465cf25609a8753efbfd45cc
https://git.kernel.org/stable/c/0998a6cb232674408a03e8561dc15aa266b2f53b
https://git.kernel.org/stable/c/db5c9a162d2f42bcc842b76b3d935dcc050a0eec
https://git.kernel.org/stable/c/c12003bf91fdff381c55ef54fef3e961a5af2545
https://git.kernel.org/stable/c/9ba1a7802ca9a2590cef95b253e6526f4364477f
https://git.kernel.org/stable/c/901f44227072be60812fe8083e83e1533c04eed1
https://git.kernel.org/stable/c/efaf89a75a29b2d179bf4fe63ca62852e93ad620
https://git.kernel.org/stable/c/18c4ef4e765a798b47980555ed665d78b71aeadf

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.