CVE-2025-40193
xtensa: simdisk: add input size check in proc_write_simdisk
Vexday Risk Score
3Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS —EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
12 Nov 2025Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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()")
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/151bd88859474cdaccc1e4c8b21fbf72dbba2ab4https://git.kernel.org/stable/c/5d5f08fd0cd970184376bee07d59f635c8403f63https://git.kernel.org/stable/c/a0c2c36d864ef3676b05cfd8c58b72ee3214cb1ahttps://git.kernel.org/stable/c/d381de7fd4cdc928ede96987dc64b133e6480dd6https://git.kernel.org/stable/c/f40405ccfb87b71175f2d5d004c0b8a0aebcc2cf