Bug 2529844 (CVE-2026-86845)

Summary: CVE-2026-86845 dpdk: dpdk: Guest-triggered use-after-free and type confusion in vhost-crypto session cleanup
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: akhatavk, aos-team-art-private, asdas, dpaolell, echaudro, eglynn, fleitner, jdelft, jjoyce, jpretori, jschluet, jupierce, ktraynor, lgarciaa, lhh, mbiarnes, mburns, mgarciac, ppalepu, ppostler, prdhamdh, rhel-process-autobot, rkhan, security-response-team, sfaye, sghai, sidsharm, suppawar, vlaad, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Fixed In Version: Doc Type: ---
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A flaw was found in DPDK lib/vhost vhost-crypto. Session cleanup can leave a stale cached session pointer, and the data path does not check the session type before attaching it, leading to use-after-free or type confusion in the host vhost-crypto backend.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2552428, 2552429, 2552430, 2552431    
Bug Blocks:    
Deadline: 2026-12-08   

Description OSIDB Bzimport 2026-09-08 14:46:46 UTC 
A flaw was found in DPDK lib/vhost vhost-crypto. vhost_crypto_close_sess() frees a cryptodev session without invalidating the per-device session cache, so a later request with the same session id uses a dangling pointer. The data path also attaches vhost_session->sym or vhost_session->asym without checking the session type, so an asymmetric session can be treated as symmetric.