CVE-2024-35864
CSIRTS triage
- What
- A use-after-free vulnerability in smb2_is_valid_lease_break() in the SMB client code may allow memory corruption.
- Who is affected
- Systems with active SMB client connections processing lease break notifications.
- Urgency
- High severity (CVSS 7.8) potential for arbitrary code execution via memory corruption.
- Action
- Apply kernel patch adding proper lifecycle management in smb2_is_valid_lease_break().
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.66% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 48% of all EPSS-scored CVEs.
Advisory coverage (1)
- highCVE-2024-35864: smb: client: fix potential UAF in smb2_is_valid_lease_break()msrc · 2026-08-06
External references
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[](https://www.csirts.com/cve/CVE-2024-35864)