CVE-2025-68773 - CVE House
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Status published Unknown CVE-2025-68773

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

Vulnerability Description

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

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Affected Vendor

Affected Software

Linux
Vulnerable Versions:
60afe299bb541a928ba39bcb4ae8d3e428d1c5a5, 4badd33929c05ed314794b95f1af1308f7222be8, 7f6738e003b364783f3019fdf6e7645bc8dd1643, fc96ec826bced75cc6b9c07a4ac44bbf651337ab, 42c04316d9275ec267d36e5e9064cd56c9884148, dc120f2d35b030390a2bc0f94dd5f37e900cae91, b558275c1b040f0e5aa56c862241f9212b6118c3, b9d9e8856f1c83e4277403f9b4c369b322ebcb12, 36a6d0f66c874666caf4e8be155b1be30f6231be, 5.10.181, 5.15.114, 6.1.29, 4.14.316, 4.19.284, 5.4.244, 6.2.16, 6.3.3, 6.4, 0, 5.10.248, 5.15.198, 6.1.160, 6.6.120, 6.12.64, 6.18.3, 6.19

Timeline

Official Publish: January 13th, 2026
Last Modified: July 14th, 2026
Added to House: July 22nd, 2026

CVSS Vectors

No vector data available

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.