CVE-2026-64384
In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix change notify replay double-free
A response-bearing attempt can return a replayable error and free its
response buffer. If SMB2_notify_init() fails before the next send, cleanup
retains the previous buffer type and frees that response again.
Reset response bookkeeping before each attempt to prevent the stale free.
CSIRTS triage
- What
- This vulnerability addresses a double-free issue in the SMB client related to change notify replay.
- Who is affected
- Deployments using the SMB client.
- Urgency
- Remediation is important to prevent potential crashes, with no current exploitation reported.
- Action
- Apply the fix for the double-free issue in the SMB client.
AI-assisted analysis generated from the source advisory — verify against the original.
⚡ Watch CVE-2026-64384
Get an email if CVE-2026-64384 is added to CISA KEV, gains public exploit code, or a new advisory cites it — max one per day, one-click unsubscribe.
Exploitation outlook
- Low exploitation risk0.46% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 37% of all EPSS-scored CVEs.
Advisory coverage (2)
- criticalCVE-2026-64384: In the Linux kernel, the following vulnerability has been resolved: smb: client: fix change no…nvd · 2026-07-25
- highCVE-2026-64384: smb: client: fix change notify replay double-freemsrc · 2026-07-14
External references
Embed the live status
— this badge updates automatically when the KEV or exploit status changes. How to embed it →
[](https://www.csirts.com/cve/CVE-2026-64384)