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.
References
- https://git.kernel.org/stable/c/1417927df8049a0194933861e9b098669a95c762
- https://git.kernel.org/stable/c/3dd6d01384823e1bd8602873153d6fc4337ac4fe
- https://git.kernel.org/stable/c/743cebcbd1b2609ec5057ab474979cef73d1b681
- https://git.kernel.org/stable/c/837a23a11e0f734f096c7c7b0778d0e625e3dc87
- https://git.kernel.org/stable/c/9c34a4a2ead00979d203a8c16bea87f0ef5291d8
- https://git.kernel.org/stable/c/be0b613198e6bfa104ad520397cab82ad3ec1771
- https://git.kernel.org/stable/c/c8f1d35076b78df61ace737e41cc1f4b7b63236c
FAQ
What is CVE-2025-68773?
CVE-2025-68773 is a documented vulnerability. 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 tr...
How severe is CVE-2025-68773?
CVSS scoring is not yet available for CVE-2025-68773. Check NVD for updates.
Is there a patch for CVE-2025-68773?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.