CVE-2025-40014: objtool, spi: amd: Fix out-of-bounds stack access in amd_set_spi_freq()
Description
In the Linux kernel, the following vulnerability has been resolved:
objtool, spi: amd: Fix out-of-bounds stack access in amd_set_spi_freq()
If speed_hz < AMD_SPI_MIN_HZ, amd_set_spi_freq() iterates over the
entire amd_spi_freq array without breaking out early, causing 'i' to go
beyond the array bounds.
Fix that by stopping the loop when it gets to the last entry, so the low
speed_hz value gets clamped up to AMD_SPI_MIN_HZ.
Fixes the following warning with an UBSAN kernel:
drivers/spi/spi-amd.o: error: objtool: amd_set_spi_freq() falls through to next function amd_spi_set_opcode()
Classification
CVE ID: CVE-2025-40014
Affected Products
Vendor: Linux
Product: Linux
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.02% (probability of being exploited)
EPSS Percentile: 3.27% (scored less or equal to compared to others)
EPSS Date: 2025-04-18 (when was this score calculated)
References
https://nvd.nist.gov/vuln/detail/CVE-2025-40014https://git.kernel.org/stable/c/7f2c746e09a3746bf937bc708129dc8af61d8f19
https://git.kernel.org/stable/c/76e51db43fe4aaaebcc5ddda67b0807f7c9bdecc