CVE-2025-40193

UNRATEDCVSS · not yet scored
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EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No CVSS published and no exploitation signals yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS v2: —Exploit: None knownExposed: 0

A fix is available — apply it.

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()")

CVSS v3
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EchelonGraph score
Not yet assessedNo source has published severity data for this CVE yet — no CVSS score from NVD or a CNA, no GitHub advisory, and it is not in CISA KEV. This is not a rating of zero; we cannot assess it yet.
EG Score
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EG Risk
—
EPSS PROB
0%
EPSS %ILE
9%
KEV
Not listed

Published

November 12, 2025

Last Modified

April 15, 2026

References (5)

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Frequently asked(4)

What is CVE-2025-40193?
CVE-2025-40193 is a publicly disclosed vulnerability published on November 12, 2025. In the Linux kernel, the following vulnerability has been resolved: xtensa: simdisk: add input size check in procwritesimdisk A malicious user could pass an arbitrarily bad value to memdupusernul(), potentially causing kernel crash. This follows the same pattern as commit ee76746387f6 ("netdevsim:…
When was CVE-2025-40193 disclosed?
CVE-2025-40193 was first published in the National Vulnerability Database on November 12, 2025, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-40193 actively exploited?
CVE-2025-40193 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 91.1% of all scored CVEs.
How do I remediate CVE-2025-40193?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-40193, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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