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Curl CVE-2026-3805

HIGH
Use After Free (CWE-416)
2026-03-11 2499f714-1537-4658-8207-48ae4bb9eae9
7.5
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SUSE
HIGH
qualitative
Red Hat
6.3 MEDIUM
qualitative

Primary rating from NVD.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

4
Analysis Generated
Mar 12, 2026 - 22:06 vuln.today
PoC Detected
Mar 12, 2026 - 14:08 vuln.today
Public exploit code
Patch released
Mar 12, 2026 - 14:08 nvd
Patch available
CVE Published
Mar 11, 2026 - 11:16 nvd
HIGH 7.5

DescriptionCVE.org

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

AnalysisAI

Curl's SMB implementation contains a use-after-free vulnerability that causes denial of service when processing consecutive requests to the same host, as the library incorrectly dereferences freed memory on subsequent connections. Public exploit code exists for this vulnerability affecting Curl installations. An attacker can crash Curl-based applications or services by triggering multiple SMB requests, though remote code execution is not possible due to the nature of the memory corruption.

Technical ContextAI

Classified as CWE-416 (Use After Free). Affects Curl. When doing a second SMB request to the same host again, curl would wrongly use a data pointer pointing into already freed memory.

RemediationAI

A vendor patch is available — apply it immediately. Restrict network access to the affected service where possible.

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Vendor StatusVendor

SUSE

Severity: High
Product Status
Container suse/manager/4.3/proxy-httpd:4.3.16.2.9.73.25 Container suse/manager/4.3/proxy-salt-broker:4.3.16.2.9.63.26 Container suse/sle-micro/base-5.5:2.0.4-5.8.252 Image SLES15-SP5-Micro-5-5 Image SLES15-SP5-Micro-5-5-Azure Image SLES15-SP5-SAP-Azure-LI-BYOS Image SLES15-SP5-SAP-Azure-LI-BYOS-Production Image SLES15-SP5-SAP-Azure-VLI-BYOS Image SLES15-SP5-SAP-Azure-VLI-BYOS-Production Affected
Container suse/manager/5.0/x86_64/proxy-httpd:latest Container suse/manager/5.0/x86_64/proxy-salt-broker:latest Container suse/manager/5.0/x86_64/server:latest Image SLES15-SP6-SAP-Azure-LI-BYOS Image SLES15-SP6-SAP-Azure-LI-BYOS-Production Image SLES15-SP6-SAP-Azure-VLI-BYOS Image SLES15-SP6-SAP-Azure-VLI-BYOS-Production Affected
Container suse/manager/5.0/x86_64/server-hub-xmlrpc-api:latest Container suse/manager/5.0/x86_64/server-migration-14-16:latest Affected
Container suse/sl-micro/6.0/baremetal-os-container:2.1.3-6.140 Affected
Container suse/sl-micro/6.0/base-os-container:2.1.3-7.107 Container suse/sl-micro/6.0/toolbox:13.2-9.77 Image SL-Micro Affected

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CVE-2026-3805 vulnerability details – vuln.today

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