HIGH 7.0 Microsoft

CVE-2025-40039

ksmbd: Fix race condition in RPC handle list access

Microsoft Security Update 2026-Aug: ksmbd: Fix race condition in RPC handle list access

Affected Products

cbl2 kernel 5.15.200.1-1 on CBL Mariner 2.0
cbl2 kernel 5.15.202.1-1 on CBL Mariner 2.0
cbl2 kernel 5.15.202.1-1
azl3 kernel 6.6.104.2-4 on Azure Linux 3.0
cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.0

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-40039
https://nvd.nist.gov/vuln/detail/CVE-2025-40039

Published: 2026-08-06 · Source: Microsoft · Feed updated: 2026-08-10

This high severity vulnerability with a CVSS score of 7.0 was published on 2026-08-06 via Microsoft. Affected: cbl2 kernel 5.15.200.1-1 on CBL Mariner 2.0, cbl2 kernel 5.15.202.1-1 on CBL Mariner 2.0, cbl2 kernel 5.15.202.1-1 and 2 more.

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