CVE-2025-40003: net: mscc: ocelot: Fix use-after-free caused by cyclic delayed work

highCVSS 7.8CVE-2025-40003

CSIRTS triage

vendor: Microchip product: Ocelot Switch Driver Memory corruption

What: The Ocelot switch driver has a use-after-free vulnerability caused by cyclic delayed work scheduling.
Who is affected: Systems using Microchip Ocelot switches with the vulnerable Linux kernel driver.
Urgency: High severity (CVSS 7.8); use-after-free can lead to kernel crash or code execution.
Action: Apply the Linux kernel patch that fixes cyclic delayed work handling in the Ocelot driver.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 7.8
Published: 2026-08-06
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-40003

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2025-400030.22% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 13% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2025-40003	coverage & exploitation status	NVD · CVE.org

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