CVE-2025-39921Medium· 5.5▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: spi: microchip-core-qspi: stop checking viability of op->max_freq in supports_op callback In commit 13529647743d9 ("spi: microchip-core-qspi: Support per spi-mem opera…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 30.3 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the CISA ADP record, not NVD.
Exploit-prediction probability, daily snapshots since Oct 21.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
0.1% → 0.2%
In the Linux kernel, the following vulnerability has been resolved:
spi: microchip-core-qspi: stop checking viability of op->max_freq in supports_op callback
In commit 13529647743d9 ("spi: microchip-core-qspi: Support per spi-mem operation frequency switches") the logic for checking the viability of op->max_freq in mchp_coreqspi_setup_clock() was copied into mchp_coreqspi_supports_op(). Unfortunately, op->max_freq is not valid when this function is called during probe but is instead zero. Accordingly, baud_rate_val is calculated to be INT_MAX due to division by zero, causing probe of the attached memory device to fail.
Seemingly spi-microchip-core-qspi was the only driver that had such a modification made to its supports_op callback when the per_op_freq capability was added, so just remove it to restore prior functionality.
Linux >= d29f749d5202605dbb7480791e6841487d8afb77 < 4ad071e3d57967f7ab483aed0687468bc1d9e9ceLinux >= 13529647743d906ed3cf991f1d77727e7ff1fb6f < ac8a13f35d5b8996582b3f97b924838a5c570c18Linux >= 13529647743d906ed3cf991f1d77727e7ff1fb6f < 89e7353f522f5cf70cb48c01ce2dcdcb275b8022Linux 6.14Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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