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CVE-2025-38728: smb3: fix for slab out of bounds on mount to ksmbd

highCVSS 7.1CVE-2025-38728

CSIRTS triage

vendor: Linuxproduct: Linux kernelMemory corruption
What
Out-of-bounds slab memory access during SMB3 mount to ksmbd server.
Who is affected
Systems mounting SMB3 shares to ksmbd with specific mount parameters.
Urgency
High severity (CVSS 7.1); memory corruption can cause kernel crash or privilege escalation.
Action
Apply the Linux kernel patch fixing bounds checking in smb3 ksmbd mount code.

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 7.1
Published
2026-08-06
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-38728

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.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2025-38728coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for smb3

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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