CVE-2025-40193

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()")

EPSS

0.2% chance of exploitation in the next 30 days; higher than 10% of CVEs (scores of 2026-10-25)

Published

2025-11-12

Modified

2026-10-19

Record from

the NVD, synced 2026-10-21

References

• https://git.kernel.org/stable/c/151bd88859474cdaccc1e4c8b21fbf72dbba2ab4
• https://git.kernel.org/stable/c/5d5f08fd0cd970184376bee07d59f635c8403f63
• https://git.kernel.org/stable/c/a0c2c36d864ef3676b05cfd8c58b72ee3214cb1a
• https://git.kernel.org/stable/c/d381de7fd4cdc928ede96987dc64b133e6480dd6
• https://git.kernel.org/stable/c/f40405ccfb87b71175f2d5d004c0b8a0aebcc2cf

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