Bug 2529206 (CVE-2026-80229)

Summary:	CVE-2026-80229 curl: libcurl: Memory corruption vulnerability via OpenSSL 3 provider use-after-free
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	akhatavk, anthomas, aos-team-art-private, asdas, bbrownin, crizzo, dpaolell, ehelms, ggainey, gtanzill, jbuscemi, jdelft, jpasqual, jupierce, juwatts, kshier, lgarciaa, mbiarnes, mdellweg, mhulan, nmoumoul, osousa, pcreech, ppalepu, ppostler, prdhamdh, rchan, rekumar, rhel-process-autobot, sdawley, sghai, sidsharm, smallamp, stcannon, suppawar, teagle, tmalecek, vlaad, vvoronko, watson-tool-maintainers, yguenane
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in libcurl when performing transfers via its multi interface with OpenSSL 3 provider configurations. Pooled TLS connections can outlive their originating easy handles, causing an allocated library context to be prematurely freed. This leaves the active connection with a dangling pointer, leading to a heap-use-after-free upon subsequent I/O or post-handshake operations. This memory corruption vulnerability could allow a remote attacker to cause a denial of service or potentially execute arbitrary code.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
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Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2537382, 2537381
Bug Blocks:

Description OSIDB Bzimport 2026-09-06 18:01:44 UTC

When performing transfers via libcurl’s multi interface, pooled TLS
connections can outlive their originating easy handles. In OpenSSL 3 provider
configurations, libcurl attaches an allocated library context to the easy
handle's state and passes it to OpenSSL without acquiring an ownership
reference; destroying the easy handle prematurely frees this context while the
active connection retains a dangling pointer, leading to a heap-use-after-free
upon subsequent I/O or post-handshake operations.