🛡️ CVE-2025-68773 — kernel

⚪ Unknown ✅ No Known Exploit NVD
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

spi: fsl-cpm: Check length parity before switching to 16 bit mode

In the Linux kernel, the following vulnerability has been resolved:

spi: fsl-cpm: Check length parity before switching to 16 bit mode

Commit fc96ec826bce ("spi: fsl-cpm: Use 16 bit mode for large transfers

with even size") failed to make sure that the size is really even

before switching to 16 bit mode. Until recently the problem went

unnoticed because kernfs uses a pre-allocated bounce buffer of size

PAGE_SIZE for reading EEPROM.

But commit 8ad6249c51d0 ("eeprom: at25: convert to spi-mem API")

introduced an additional dynamically allocated bounce buffer whose size

is exactly the size of the transfer, leading to a buffer overrun in

the fsl-cpm driver when that size is odd.

Add the missing length parity verification and remain in 8 bit mode

when the length is not even.

Affected software

CVE-2025-68773 is recorded against 2 packages.

  • kernel (from 6.7.0 up to 6.18.3)
  • unknown

Timeline and source

Published on 13 January 2026 and last revised on 16 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

cert-portal.siemens.com (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

CVE-2025-68773 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2026-01-13
Updated 2026-08-12
Modified 2026-07-16
Fix URL N/A

Affected Packages

Software From version Fixed in
kernel 6.7.0 6.18.3
unknown — —

References

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