CSIRTS // UNIFIED SECURITY ADVISORY FEEDSYS ● ONLINE · POWERED BY INTELFUSIONS.COM

← Back to feed

CVE-2025-39932: smb: client: let smbd_destroy() call disable_work_sync(&info->post_send_credits_work)

mediumCVSS 5.7CVE-2025-39932

CSIRTS triage

vendor: Microsoftproduct: SMB ClientDenial of service
What
Missing work synchronization call in smbd_destroy() for post_send_credits_work cleanup.
Who is affected
Systems running Microsoft SMB client code with active SMB sessions.
Urgency
Medium urgency; improper cleanup can lead to resource leaks or race conditions.
Action
Apply the patch ensuring disable_work_sync() is called in smbd_destroy().

AI-assisted analysis generated from the source advisory — verify against the original.

⚡ Watch SMB Client

Get an email when a new SMB Client advisory drops — max one per day, one-click unsubscribe.

Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
medium — CVSS 5.7
Published
2026-08-06
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-39932

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-2025-39932coverage & exploitation statusNVD · CVE.org

Recent advisories for smb

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.

More from Microsoft Security Response Center