ksmbd vulnerability

About this tag
The ksmbd vulnerability tag covers discussions about security flaws in the Linux kernel's in-kernel SMB server (ksmbd), including CVEs such as CVE-2025-38092, CVE-2025-22042, CVE-2025-38437, and CVE-2025-40039. Topics include missing bounds checks, use-after-free issues, and race conditions in RPC handle operations. Microsoft's MSRC has attested that Azure Linux includes the vulnerable ksmbd code, but this attestation is product-scoped and does not guarantee other Microsoft artifacts are unaffected. Users and administrators are advised to prioritize patching Azure Linux while verifying other Microsoft images, kernels, and WSL artifacts for potential exposure. The discussions emphasize the importance of artifact-level discovery and understanding the scope of vulnerability attestations.

  1. Azure Linux ksmbd CVE-2025-38092: What Attestation Means for Microsoft Artifacts

    Microsoft’s MSRC entry naming Azure Linux as a product that “includes this open‑source library and is therefore potentially affected” is an authoritative, product‑level attestation — but it is not a categorical guarantee that no other Microsoft artifact or product can include the same vulnerable...
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    • azure linux ksmbd vulnerability machine readable attestations security best practices
    • Replies: 0
    • Forum: Security Alerts

  2. CVE-2025-22042 Ksmbd Patch and Azure Linux Attestation Explained

    Microsoft’s concise MSRC line — “Azure Linux includes this open‑source library and is therefore potentially affected” — is accurate for the product Microsoft has inspected, but it should not be read as a categorical statement that only Azure Linux could include the vulnerable ksmbd code. The...
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    • azure linux cve 2025 22042 ksmbd vulnerability msrc attestation
    • Replies: 0
    • Forum: Security Alerts

  3. CVE-2025-38437: Azure Linux Attestation and ksmbd Kernel Verification

    Microsoft’s brief, machine‑readable advisory that “Azure Linux includes this open‑source library and is therefore potentially affected” is accurate — but it is a product‑scoped attestation, not a blanket guarantee that no other Microsoft product could carry the same vulnerable ksmbd code...
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    • azure linux attestation csaf vex attestations ksmbd vulnerability vulnerability management
    • Replies: 0
    • Forum: Security Alerts

  4. CVE-2025-40039: Linux ksmbd race condition fix in kernel RPC handles

    A recently disclosed Linux kernel vulnerability in the ksmbd subsystem — tracked as CVE-2025-40039 — fixes a subtle but consequential race condition in the kernel SMB server’s RPC handle list that could lead to inconsistent state, data corruption, or use‑after‑free when RPC handles are accessed...
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    • cve 2025 40039 kernel concurrency ksmbd vulnerability linux kernel
    • Replies: 0
    • Forum: Security Alerts