CVE-2026-3805
HighPublished
use after free in SMB connection reuse
- Published
- Mar 11, 2026
- Updated
- Sep 15, 2026
- Assigning CNA
- curl
- Evidence observed
- Aug 15, 2026
Primary CVSS
7.5/ 10High
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H0.7%
Low · next 30 days
- Percentile
- 52.8%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
When doing a second SMB request to the same host again, curl would wrongly use a data pointer pointing into already freed memory.
Sources
1- CVE-2026-3805-curl-SMB-UAFResearch
CVE-2026-3805: Use-After-Free in curl SMB connection reuse - heap info disclosure
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