Vulnerability Details CVE-2025-39921
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 4.4%
CVSS Severity
CVSS v3 Score 5.5
References
Products affected by CVE-2025-39921
-
cpe:2.3:o:linux:linux_kernel:6.14
-
cpe:2.3:o:linux:linux_kernel:6.14.1
-
cpe:2.3:o:linux:linux_kernel:6.14.10
-
cpe:2.3:o:linux:linux_kernel:6.14.11
-
cpe:2.3:o:linux:linux_kernel:6.14.2
-
cpe:2.3:o:linux:linux_kernel:6.14.3
-
cpe:2.3:o:linux:linux_kernel:6.14.4
-
cpe:2.3:o:linux:linux_kernel:6.14.5
-
cpe:2.3:o:linux:linux_kernel:6.14.6
-
cpe:2.3:o:linux:linux_kernel:6.14.7
-
cpe:2.3:o:linux:linux_kernel:6.14.8
-
cpe:2.3:o:linux:linux_kernel:6.14.9
-
cpe:2.3:o:linux:linux_kernel:6.15
-
cpe:2.3:o:linux:linux_kernel:6.15.1
-
cpe:2.3:o:linux:linux_kernel:6.15.10
-
cpe:2.3:o:linux:linux_kernel:6.15.11
-
cpe:2.3:o:linux:linux_kernel:6.15.2
-
cpe:2.3:o:linux:linux_kernel:6.15.3
-
cpe:2.3:o:linux:linux_kernel:6.15.4
-
cpe:2.3:o:linux:linux_kernel:6.15.5
-
cpe:2.3:o:linux:linux_kernel:6.15.6
-
cpe:2.3:o:linux:linux_kernel:6.15.7
-
cpe:2.3:o:linux:linux_kernel:6.15.8
-
cpe:2.3:o:linux:linux_kernel:6.15.9
-
cpe:2.3:o:linux:linux_kernel:6.16
-
cpe:2.3:o:linux:linux_kernel:6.16.1
-
cpe:2.3:o:linux:linux_kernel:6.16.2
-
cpe:2.3:o:linux:linux_kernel:6.16.3
-
cpe:2.3:o:linux:linux_kernel:6.16.4
-
cpe:2.3:o:linux:linux_kernel:6.16.5
-
cpe:2.3:o:linux:linux_kernel:6.17