High
Security advisory
A flaw was found in the vhost library in DPDK. Function vhost_user_set_inflight_fd() does not validate `msg->payload.inflight.num_queues`, possibly causing out-of-bounds memory read/write. Any software using DPDK vhost library may crash as a result of this vulnerability.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-3839
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 12:41 UTC · Revision 1
Source evidence
A flaw was found in the vhost library in DPDK. Function vhost_user_set_inflight_fd() does not validate `msg->payload.inflight.num_queues`, possibly causing out-of-bounds memory read/write. Any software using DPDK vhost library may crash as a result of this vulnerability.
osv:CVE-2021-3839
Complete source record
{
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"url": "https://osv.dev/vulnerability/CVE-2021-3839",
"method": "structured",
"payload": {
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"title": "CVE-2021-3839",
"summary": "A flaw was found in the vhost library in DPDK. Function vhost_user_set_inflight_fd() does not validate `msg->payload.inflight.num_queues`, possibly causing out-of-bounds memory read/write. Any software using DPDK vhost library may crash as a result of this vulnerability.",
"evidence": "osv:CVE-2021-3839",
"products": [],
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{
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"database_specific": {
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"vanir_signatures": [
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"source": "https://github.com/dpdk/dpdk/commit/6442c329b9d2ded0f44b27d2016aaba8ba5844c5",
"target": {
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"signature_type": "Line",
"signature_version": "v1"
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{
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"digest": {
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"function_hash": "340127545324019451371334732147163230990"
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"source": "https://github.com/dpdk/dpdk/commit/6442c329b9d2ded0f44b27d2016aaba8ba5844c5",
"target": {
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"function": "vhost_user_check_and_alloc_queue_pair"
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"modified": "2026-10-20T14:12:43.687202296Z",
"provider": "osv",
"references": [
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"https://bugzilla.redhat.com/show_bug.cgi?id=2025882",
"https://github.com/DPDK/dpdk/commit/6442c329b9d2ded0f44b27d2016aaba8ba5844c5"
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"provider_metadata": {
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"related_cves": [
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"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 388717,
"published_at": "2022-08-23T16:15:10.087+00:00"
}