Bug 2529201 (CVE-2026-18924)

Summary: CVE-2026-18924 curl: libcurl: Use-after-free in HTTP/2 Server Push with shared connections
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: 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   
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Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in libcurl. When libcurl handles HTTP/2 Server Push streams and the parent handle shares connections, a use-after-free vulnerability can occur during the cleanup process. This could lead to application crashes, resulting in 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: 2535955, 2535958, 2535962, 2535963, 2535956, 2535957, 2535959, 2535960, 2535961    
Bug Blocks:    

Description OSIDB Bzimport 2026-09-06 17:51:26 UTC 
A flaw in libcurl's handling of HTTP/2 Server Push streams, when the parent
handle is set to share connections with other handles, can lead to
use-after-free in the cleanup process.