What is CVE-2026-31609?

CVE-2026-31609 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. smb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush()

Which CVE IDs does CVE-2026-31609 cover?

CVE-2026-31609 covers the following CVE IDs: CVE-2026-31609. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-31609?

CVE-2026-31609 has a CVSS v3 base score of 7.8, published by Microsoft Security Response Center (MSRC).

CVE-2026-31609HighCVSS 7.8

smb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush()

Vendor

Microsoft Security Response Center (MSRC)

Published

June 2, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-31609 →