Unrated severityNVD Advisory· Published Nov 12, 2025· Updated Apr 15, 2026
CVE-2025-40193
CVE-2025-40193
Description
In the Linux kernel, the following vulnerability has been resolved:
xtensa: simdisk: add input size check in proc_write_simdisk
A malicious user could pass an arbitrarily bad value to memdup_user_nul(), potentially causing kernel crash.
This follows the same pattern as commit ee76746387f6 ("netdevsim: prevent bad user input in nsim_dev_health_break_write()")
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Affected products
3Patches
Vulnerability mechanics
References
5- git.kernel.org/stable/c/151bd88859474cdaccc1e4c8b21fbf72dbba2ab4nvd
- git.kernel.org/stable/c/5d5f08fd0cd970184376bee07d59f635c8403f63nvd
- git.kernel.org/stable/c/a0c2c36d864ef3676b05cfd8c58b72ee3214cb1anvd
- git.kernel.org/stable/c/d381de7fd4cdc928ede96987dc64b133e6480dd6nvd
- git.kernel.org/stable/c/f40405ccfb87b71175f2d5d004c0b8a0aebcc2cfnvd
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