Vulnerability Details : CVE-2021-3839
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.
Vulnerability category: Memory Corruption
Products affected by CVE-2021-3839
- cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:enterprise_linux_fast_datapath:7.0:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:enterprise_linux_fast_datapath:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
- cpe:2.3:a:dpdk:data_plane_development_kit:*:*:*:*:*:*:*:*
- cpe:2.3:a:dpdk:data_plane_development_kit:22.03:rc2:*:*:*:*:*:*
- cpe:2.3:a:dpdk:data_plane_development_kit:22.03:rc3:*:*:*:*:*:*
- cpe:2.3:a:dpdk:data_plane_development_kit:22.03:rc1:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-3839
0.12%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 46 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-3839
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2021-3839
-
The product reads data past the end, or before the beginning, of the intended buffer.Assigned by:
- nvd@nist.gov (Primary)
- secalert@redhat.com (Secondary)
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by:
- nvd@nist.gov (Primary)
- secalert@redhat.com (Secondary)
References for CVE-2021-3839
-
https://access.redhat.com/security/cve/CVE-2021-3839
CVE-2021-3839- Red Hat Customer PortalThird Party Advisory
-
https://bugzilla.redhat.com/show_bug.cgi?id=2025882
2025882 – (CVE-2021-3839) CVE-2021-3839 DPDK: out-of-bounds read/write in vhost_user_set_inflight_fd() may lead to crashIssue Tracking;Patch;Third Party Advisory
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https://github.com/DPDK/dpdk/commit/6442c329b9d2ded0f44b27d2016aaba8ba5844c5
vhost: fix queue number check when setting inflight FD · DPDK/dpdk@6442c32 · GitHubPatch;Third Party Advisory
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