CVE Catalog

CVE-2025-71150

HighCVSS 7.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.23%

14th percentile - higher than 14% of all known CVEs

Summary

In the Linux kernel, a reference count leak was found in the ksmbd module during session lookup. When a session is found but its state is not SMB2_SESSION_VALID, the reference count acquired by the session lookup is not decremented.

Risk Assessment

The reference count leak can lead to kernel memory exhaustion, potentially causing a denial of service (DoS) for the SMB server.

Recommendation

Immediately update the Linux kernel to a version containing the fix that explicitly calls ksmbd_user_session_put to release the session reference.

Other vulnerabilities in Linux kernel

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Original NVD description (English source)

In the Linux kernel, the following vulnerability has been resolved: ksmbd: Fix refcount leak when invalid session is found on session lookup When a session is found but its state is not SMB2_SESSION_VALID, It indicates that no valid session was found, but it is missing to decrement the reference count acquired by the session lookup, which results in a reference count leak. This patch fixes the issue by explicitly calling ksmbd_user_session_put to release the reference to the session.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS