Bug 2446451 (CVE-2026-3805)

Summary: CVE-2026-3805 curl: curl: Arbitrary code execution or Denial of Service via use-after-free in SMB request handling
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: adudiak, bbrownin, crizzo, csutherl, dbosanac, gtanzill, jbuscemi, jcantril, jclere, jmitchel, jreimann, kaycoth, kshier, mdessi, mrizzi, pbohmill, pcattana, pjindal, plodge, rojacob, sdawley, stcannon, szappis, teagle, vchlup, yguenane
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in curl. When handling a second Server Message Block (SMB) request to the same host, curl incorrectly accesses memory that has already been freed. This memory corruption vulnerability, known as a use-after-free, could allow a remote attacker to potentially execute arbitrary code or cause a denial of service.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2446457, 2446458, 2446459, 2446464, 2446465, 2446466, 2446467, 2446471, 2446461, 2446462, 2446463, 2446468, 2446469, 2446470    
Bug Blocks:    

Description OSIDB Bzimport 2026-03-11 11:01:27 UTC
When doing a second SMB request to the same host again, curl would wrongly use
a data pointer pointing into already freed memory.