CVE-2026-93683— Dpdk: dpdk: guest-triggered out-of-bounds walk via vhost indirect descriptor length toctou
Quick assessment
Affected
Red Hat Fast Datapath for RHEL 10
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
在 DPDK vhost 库中发现一个安全漏洞。当处理 virtio 间接描述符表时，主机从客户机内存中多次读取该表的长度，并在验证长度之前分配主机副本。如果客户机在这两次读取之间修改长度，或在 vDPA 中继路径中提供一个超出范围的下一索引值且主机副本较小，则可能导致主机 vhost 进程越过已验证的内存映射或堆副本。这可能导致 vhost 进程崩溃或运行异常。越界读取的字节被用作描述符字段进行 GPA（客户机物理地址）转换，并不会作为载荷返回给客户机。该问题是非连续间接描述符拷贝路径中的遗留缺陷，该路径是在修复
Possible ATT&CK Techniques 2 AI
T1498 · Network Denial of Service T1499 · Endpoint Denial of ServiceAffected Version Matrix 24
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Red Hat | Fast Datapath for RHEL 10 | any |
affected |
any |
affected | ||
| Red Hat | Fast Datapath for RHEL 8 | any |
affected |
any |
affected | ||
any |
affected | ||
any |
affected | ||
any |
affected | ||
any |
affected | ||
any |
affected | ||
| Red Hat | Fast Datapath for RHEL 9 | any |
affected |
any |
affected | ||
any |
affected | ||
any |
affected | ||
any |
affected | ||
any |
affected | ||
any |
affected | ||
any |
affected | ||
| Red Hat | Red Hat Enterprise Linux 10 | any |
affected |
| Red Hat | Red Hat Enterprise Linux 8 | any |
affected |
| Red Hat | Red Hat Enterprise Linux 9 | any |
affected |
| Red Hat | Red Hat OpenShift Container Platform 4 | any |
affected |
any |
affected | ||
any |
affected | ||
| Red Hat | Red Hat OpenStack Platform 13 (Queens) | any |
affected |
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I. Basic Information for CVE-2026-93683
Vulnerability Information
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Vulnerability Title
Dpdk: dpdk: guest-triggered out-of-bounds walk via vhost indirect descriptor length toctou
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in the DPDK vhost library. When handling a virtio indirect descriptor table, the host reads the table length more than once from guest memory and can allocate a host copy before validating that length. A guest that changes the length between those reads, or that supplies an out-of-range next index on a small host copy in the vDPA relay path, can cause the host vhost process to walk past the validated mapping or heap copy. That can crash or disrupt the vhost process. Out-of-bounds bytes are consumed as descriptor fields for GPA translation and are not returned to the guest as payload. This is a residual issue in the non-contiguous indirect descriptor copy path introduced as part of the CVE-2018-1059 fix.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
检查时间与使用时间(TOCTOU)的竞争条件
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Red Hat | Fast Datapath for RHEL 10 | - |
cpe:/o:redhat:enterprise_linux:10::fastdatapath
|
|
| Red Hat | Fast Datapath for RHEL 10 | - |
cpe:/o:redhat:enterprise_linux:10::fastdatapath
|
|
| Red Hat | Fast Datapath for RHEL 8 | - |
cpe:/o:redhat:enterprise_linux:8::fastdatapath
|
|
| Red Hat | Fast Datapath for RHEL 8 | - |
cpe:/o:redhat:enterprise_linux:8::fastdatapath
|
|
| Red Hat | Fast Datapath for RHEL 8 | - |
cpe:/o:redhat:enterprise_linux:8::fastdatapath
|
|
| Red Hat | Fast Datapath for RHEL 8 | - |
cpe:/o:redhat:enterprise_linux:8::fastdatapath
|
|
| Red Hat | Fast Datapath for RHEL 8 | - |
cpe:/o:redhat:enterprise_linux:8::fastdatapath
|
|
| Red Hat | Fast Datapath for RHEL 8 | - |
cpe:/o:redhat:enterprise_linux:8::fastdatapath
|
|
| Red Hat | Fast Datapath for RHEL 8 | - |
cpe:/o:redhat:enterprise_linux:8::fastdatapath
|
|
| Red Hat | Fast Datapath for RHEL 9 | - |
cpe:/o:redhat:enterprise_linux:9::fastdatapath
|
|
| Red Hat | Fast Datapath for RHEL 9 | - |
cpe:/o:redhat:enterprise_linux:9::fastdatapath
|
|
| Red Hat | Fast Datapath for RHEL 9 | - |
cpe:/o:redhat:enterprise_linux:9::fastdatapath
|
|
| Red Hat | Fast Datapath for RHEL 9 | - |
cpe:/o:redhat:enterprise_linux:9::fastdatapath
|
|
| Red Hat | Fast Datapath for RHEL 9 | - |
cpe:/o:redhat:enterprise_linux:9::fastdatapath
|
|
| Red Hat | Fast Datapath for RHEL 9 | - |
cpe:/o:redhat:enterprise_linux:9::fastdatapath
|
|
| Red Hat | Fast Datapath for RHEL 9 | - |
cpe:/o:redhat:enterprise_linux:9::fastdatapath
|
|
| Red Hat | Fast Datapath for RHEL 9 | - |
cpe:/o:redhat:enterprise_linux:9::fastdatapath
|
|
| Red Hat | Red Hat Enterprise Linux 10 | - |
cpe:/o:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 8 | - |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 9 | - |
cpe:/o:redhat:enterprise_linux:9
|
|
| Red Hat | Red Hat OpenShift Container Platform 4 | - |
cpe:/a:redhat:openshift:4
|
|
| Red Hat | Red Hat OpenShift Container Platform 4 | - |
cpe:/a:redhat:openshift:4
|
|
| Red Hat | Red Hat OpenShift Container Platform 4 | - |
cpe:/a:redhat:openshift:4
|
|
| Red Hat | Red Hat OpenStack Platform 13 (Queens) | - |
cpe:/a:redhat:openstack:13
|
|
II. Public POCs for CVE-2026-93683
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-93683 (2)
-
-
🔗 2537015 – (CVE-2026-93683) CVE-2026-93683 dpdk: dpdk: Guest-triggered out-of-bounds walk via vhost indirect descriptor length TOCTOU issue-tracking x_refsource_REDHAT
Same Patch Batch · Red Hat · 2026-10-14 · 25 CVEs total
| CVE-2026-104795 | 8.8 HIGH | Insights-runtime-extractor: insights-runtime-extractor: container escape via privileged bi |
| CVE-2026-86848 | 8.8 HIGH | Dpdk: dpdk: time-of-check/time-of-use vulnerability allowing guest-triggered out-of-bounds |
| CVE-2026-86567 | 8.8 HIGH | Dpdk: dpdk: vduse handler fails to invalidate vring pointers when iotlb is invalidated, le |
| CVE-2026-100236 | 8.6 HIGH | Dpdk: dpdk: heap out-of-bounds read/write in gso header copy |
| CVE-2026-86476 | 8.4 HIGH | Gstreamer1-plugins-base: gst-plugins-base: heap buffer overflow via unvalidated gstvideome |
| CVE-2026-86565 | 8.2 HIGH | Dpdk: dpdk: guest can desynchronize virtqueue size from inflight descriptor table size, ca |
| CVE-2026-90954 | 7.8 HIGH | Busybox: busybox: dpkg-deb extraction-root escape via per-ar-member deferred symlink flush |
| CVE-2026-86563 | 7.8 HIGH | Dpdk: dpdk: double offset bug in vhost log mapping calculation |
| CVE-2026-86562 | 7.8 HIGH | Dpdk: dpdk: control-queue descriptor double-fetch overflows host heap in dpdk vhost (vduse |
| CVE-2026-88829 | 7.2 HIGH | Busybox: busybox: http request smuggling via pipelined requests in httpd reverse proxy |
| CVE-2026-86561 | 6.5 MEDIUM | Dpdk: dpdk: missing memory size validation before mmap in vhost memory region setup |
| CVE-2026-100229 | 6.5 MEDIUM | Gstreamer1-plugins-bad-free: gstreamer1-plugins-bad-free: out-of-bounds write in gst_h266_ |
| CVE-2026-86849 | 6.5 MEDIUM | Dpdk: dpdk: integer overflow combined with missing validation leads to host buffer overflo |
| CVE-2026-86566 | 6.5 MEDIUM | Dpdk: dpdk: guest with runt rx descriptors underflows copy length in vhost enqueue (split |
| CVE-2026-86845 | 6.5 MEDIUM | Dpdk: dpdk: guest-triggered use-after-free and type confusion in vhost-crypto session clea |
| CVE-2026-86846 | 6.5 MEDIUM | Dpdk: dpdk: guest can trigger out-of-bounds write by controlling avail ring index in vhost |
| CVE-2026-86847 | 6.5 MEDIUM | Dpdk: dpdk: guest can trigger infinite loop in vhost-crypto writeback chain cleanup |
| CVE-2026-86856 | 6.5 MEDIUM | Dpdk: dpdk: stack and heap buffer overflow in nfp vdpa driver |
| CVE-2026-100231 | 6.1 MEDIUM | Gstreamer1-plugins-bad-free: gstreamer1-plugins-bad-free: heap out-of-bounds write in asfm |
| CVE-2026-109968 | 5.5 MEDIUM | Clevis: clevis: pkcs#11 luks passphrase logged in plaintext to world-readable file |
Showing top 20 of 25 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Fast Datapath for RHEL 10
-
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Dpdk: dpdk: integer overflow combined with missing validatio -
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Dpdk: dpdk: stack and heap buffer overflow in nfp vdpa drive -
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Dpdk: dpdk: guest can trigger infinite loop in vhost-crypto -
CVE-2026-86846
Dpdk: dpdk: guest can trigger out-of-bounds write by control -
CVE-2026-86845
Dpdk: dpdk: guest-triggered use-after-free and type confusio
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