Bug 2552445

Summary: CVE-2026-86849 dpdk: dpdk: Integer overflow combined with missing validation leads to host buffer overflow in vhost-crypto [fedora-all]
Product: [Fedora] Fedora Reporter: Ganesh <gnaik>
Component: dpdkAssignee: Timothy Redaelli <tredaelli>
Status: NEW --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: aconole, tredaelli
Target Milestone: ---Keywords: Security, SecurityTracking
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Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["f769f5e4-1ed9-4159-9afb-0158e393605d"]}
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On:    
Bug Blocks: 2529858    

Description Ganesh 2026-10-14 16:04:39 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

A flaw was found in DPDK lib/vhost vhost-crypto. vhost_crypto_check_chain_request() adds uint32_t length fields without overflow checks, so a wrapped sum can pass the cap while prepare_write_back_data() still uses the original dst_data_len. write_back_data() then memcpy/memset that length from a host mbuf. The RSA request path has no equivalent length cap.