When doing a second SMB request to the same host again, curl would wrongly use
a data pointer pointing into already freed memory.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00042.

Exploitation poc

Automatable yes

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
curl curl unaffected
Version Status Constraints
8.18.0 affected ≤ 8.18.0
8.17.0 affected ≤ 8.17.0
8.16.0 affected ≤ 8.16.0
8.15.0 affected ≤ 8.15.0
8.14.1 affected ≤ 8.14.1
8.14.0 affected ≤ 8.14.0
8.13.0 affected ≤ 8.13.0

Configuration 1 [-]

cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors Products
Curl Subscribe
Curl Subscribe

Project Subscriptions

Vendors Products
Curl Subscribe
Curl Subscribe
Haxx Subscribe
Curl Subscribe
Advisories
Source ID Title
Ubuntu USN Ubuntu USN USN-8084-1 curl vulnerabilities
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
http://www.openwall.com/lists/oss-security/2026/03/11/4 cve-icon
https://curl.se/docs/CVE-2026-3805.html cve-icon cve-icon
https://curl.se/docs/CVE-2026-3805.json cve-icon cve-icon
https://hackerone.com/reports/3591944 cve-icon cve-icon
History

Thu, 12 Mar 2026 14:15:00 +0000

Type Values Removed Values Added
First Time appeared Haxx
Haxx curl
CPEs cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*
Vendors & Products Haxx
Haxx curl

Thu, 12 Mar 2026 10:15:00 +0000

Type Values Removed Values Added
First Time appeared Curl
Curl curl
Vendors & Products Curl
Curl curl

Wed, 11 Mar 2026 16:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 11 Mar 2026 11:30:00 +0000

Type Values Removed Values Added
References

Wed, 11 Mar 2026 10:30:00 +0000

Type Values Removed Values Added
Description When doing a second SMB request to the same host again, curl would wrongly use a data pointer pointing into already freed memory.
Title use after free in SMB connection reuse
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: curl

Published:

Updated: 2026-03-11T15:45:38.820Z

Reserved: 2026-03-08T16:07:39.817Z

Link: CVE-2026-3805

cve-icon Vulnrichment

Updated: 2026-03-11T10:16:34.391Z

cve-icon NVD

Status : Analyzed

Published: 2026-03-11T11:16:00.967

Modified: 2026-03-12T14:08:56.790

Link: CVE-2026-3805

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-03-12T10:06:02Z

Weaknesses