CVE-2025-40193

Not scored yetLast modified Oct 19, 2026

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()")

Metrics

No CVSS score has been published yet.

Affected software

VendorProductVersions
LinuxLinux>= b6c7e873daf765e41233b9752083b66442703b7a, < f40405ccfb87b71175f2d5d004c0b8a0aebcc2cf; >= b6c7e873daf765e41233b9752083b66442703b7a, < 151bd88859474cdaccc1e4c8b21fbf72dbba2ab4; >= b6c7e873daf765e41233b9752083b66442703b7a, < d381de7fd4cdc928ede96987dc64b133e6480dd6; >= b6c7e873daf765e41233b9752083b66442703b7a, < a0c2c36d864ef3676b05cfd8c58b72ee3214cb1a; >= b6c7e873daf765e41233b9752083b66442703b7a, < 5d5f08fd0cd970184376bee07d59f635c8403f63
LinuxLinux3.9

References

Timeline

Published
Nov 12, 2025
Last modified
Oct 19, 2026
NVD status
Deferred

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CVE-2025-40193: Unscored | Vulnix