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TI-2026-74057 Aliases CVE-2026-93683GHSA-vg6x-f7m9-xx3h

DPDK vhost out-of-bounds walk via indirect descriptor length TOCTOU

Priority LOW 27CWE-367Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
Low · None · High
Fix status
Partial Red Hat: 2 fixed, 6 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

Summary

Red Hat builds of the DPDK vhost library for Red Hat Enterprise Linux 9 and 10 are affected before 2:25.11-2.el9_8 and 2:25.11-2.el10_2. When handling virtio indirect descriptor tables, the host reads the table length more than once from guest memory (CWE-367), so a guest that changes the length between reads can make the vhost process walk past its validated mapping or heap copy. A guest with low privileges can crash or disrupt the vhost process, while the out-of-bounds bytes are not returned to the guest.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00111 1st percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 2 fixed, 6 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Red HatRed Hat Enterprise Linux 10—2:25.11-2.el10_2Patch availableCNA
Red HatRed Hat Enterprise Linux 9—2:25.11-2.el9_8Patch availableCNA
Red HatFast Datapath for RHEL 10——No fix listedCNA
Red HatFast Datapath for RHEL 10——No fix listedCNA
Red HatFast Datapath for RHEL 8——No fix listedCNA
Red HatFast Datapath for RHEL 8——No fix listedCNA
Red HatFast Datapath for RHEL 8——No fix listedCNA
Red HatFast Datapath for RHEL 8——No fix listedCNA
Red HatFast Datapath for RHEL 8——No fix listedCNA
Red HatFast Datapath for RHEL 8——No fix listedCNA
Red HatFast Datapath for RHEL 8——No fix listedCNA
Red HatFast Datapath for RHEL 9——No fix listedCNA
Red HatFast Datapath for RHEL 9——No fix listedCNA
Red HatFast Datapath for RHEL 9——No fix listedCNA
Red HatFast Datapath for RHEL 9——No fix listedCNA
Red HatFast Datapath for RHEL 9——No fix listedCNA
Red HatFast Datapath for RHEL 9——No fix listedCNA
Red HatFast Datapath for RHEL 9——No fix listedCNA
Red HatFast Datapath for RHEL 9——No fix listedCNA
Red HatRed Hat Enterprise Linux 8——No fix listedCNA
Red HatRed Hat OpenShift Container Platform 4——No fix listedCNA
Red HatRed Hat OpenShift Container Platform 4——No fix listedCNA
Red HatRed Hat OpenShift Container Platform 4——No fix listedCNA
Red HatRed Hat OpenStack Platform 13 (Queens)——No fix listedCNA
  • Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in 2:25.11-2.el10_2 Patch available CNA
  • Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 2:25.11-2.el9_8 Patch available CNA
  • Fast Datapath for RHEL 10 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Fast Datapath for RHEL 10 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Fast Datapath for RHEL 8 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Fast Datapath for RHEL 8 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Fast Datapath for RHEL 8 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Fast Datapath for RHEL 8 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Fast Datapath for RHEL 8 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Fast Datapath for RHEL 8 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Fast Datapath for RHEL 8 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Fast Datapath for RHEL 9 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Fast Datapath for RHEL 9 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Fast Datapath for RHEL 9 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Fast Datapath for RHEL 9 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Fast Datapath for RHEL 9 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Fast Datapath for RHEL 9 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Fast Datapath for RHEL 9 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Fast Datapath for RHEL 9 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat OpenStack Platform 13 (Queens) VendorRed Hat Affected — Fixed in — No fix listed CNA

CPE names CNA · 8

CPEVersionsRoleVendor
cpe:/o:redhat:enterprise_linux:10.210.2—Red Hat
cpe:/a:redhat:enterprise_linux:9::appstream9—Red Hat
cpe:/o:redhat:enterprise_linux:10::fastdatapath10—Red Hat
cpe:/o:redhat:enterprise_linux:8::fastdatapath8—Red Hat
cpe:/o:redhat:enterprise_linux:9::fastdatapath9—Red Hat
cpe:/a:redhat:enterprise_linux:88—Red Hat
cpe:/a:redhat:openshift:44—Red Hat
cpe:/a:redhat:openstack:1313—Red Hat
  • cpe:/o:redhat:enterprise_linux:10.2 Versions 10.2 — ·Red Hat
  • cpe:/a:redhat:enterprise_linux:9::appstream Versions 9 — ·Red Hat
  • cpe:/o:redhat:enterprise_linux:10::fastdatapath Versions 10 — ·Red Hat
  • cpe:/o:redhat:enterprise_linux:8::fastdatapath Versions 8 — ·Red Hat
  • cpe:/o:redhat:enterprise_linux:9::fastdatapath Versions 9 — ·Red Hat
  • cpe:/a:redhat:enterprise_linux:8 Versions 8 — ·Red Hat
  • cpe:/a:redhat:openshift:4 Versions 4 — ·Red Hat
  • cpe:/a:redhat:openstack:13 Versions 13 — ·Red Hat

Remediation

Update dpdk to 2:25.11-2.el10_2 on Red Hat Enterprise Linux 10 (RHSA-2026:94630) and to 2:25.11-2.el9_8 on Red Hat Enterprise Linux 9 (RHSA-2026:94629). The sources list no fixed version for Fast Datapath for RHEL 8, 9 and 10, Red Hat Enterprise Linux 8, Red Hat OpenShift Container Platform 4 and Red Hat OpenStack Platform 13 (Queens).

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

Red Hat 2 advisories

  • RHSA-2026:94629 Released 2026-11-03 · Red Hat rating Important
    dpdk security update
    • Red Hat Enterprise Linux AppStream (v. 9) dpdk-2:25.11-2.el9_8, dpdk-devel-2:25.11-2.el9_8, dpdk-doc-2:25.11-2.el9_8 +1
  • RHSA-2026:94630 Released 2026-11-03 · Red Hat rating Important
    dpdk security update
    • Red Hat Enterprise Linux AppStream (v. 10) dpdk-2:25.11-2.el10_2, dpdk-devel-2:25.11-2.el10_2, dpdk-doc-2:25.11-2.el10_2 +1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Red Hat Fast Datapath for RHEL 10, Fast Datapath for RHEL 8 and 6 more products — RHSA-2026:94629

    14 records Highest priority Priority MEDIUM 1 MEDIUM, 13 LOW

    Other records, highest priority first

    • TI-2026-74176 Out-of-bounds write in DPDK GSO header copyPriority MEDIUM 43
    • TI-2026-74386 DPDK vhost-crypto race condition enables out-of-bounds host accessPriority LOW 39
    • TI-2026-74382 DPDK VDUSE handler use-after-unmap after IOTLB invalidationPriority LOW 39
    Show all 14 records → Advisory →
  • Advisory ·

    Red Hat Fast Datapath for RHEL 10, Fast Datapath for RHEL 8 and 6 more products — RHSA-2026:94630

    14 records Highest priority Priority MEDIUM 1 MEDIUM, 13 LOW

    Other records, highest priority first

    • TI-2026-74176 Out-of-bounds write in DPDK GSO header copyPriority MEDIUM 43
    • TI-2026-74386 DPDK vhost-crypto race condition enables out-of-bounds host accessPriority LOW 39
    • TI-2026-74382 DPDK VDUSE handler use-after-unmap after IOTLB invalidationPriority LOW 39
    Show all 14 records → Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Fast Datapath for RHEL 10AffectedNo fix yet: Fix deferred
Fast Datapath for RHEL 8AffectedNo fix yet: Fix deferred
Fast Datapath for RHEL 9AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 8AffectedNo fix yet
Red Hat OpenShift Container Platform 4AffectedNo fix yet: Fix deferred
Red Hat OpenStack Platform 13 (Queens)AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:94630
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:94629

Timeline

  1. 2026-10-14 Threatist record created from CVE-2026-93683
  2. 2026-10-15 Alias added: GHSA-vg6x-f7m9-xx3h
  3. 2026-10-15 CISA SSVC decision points changed
  4. 2026-10-15 Priority changed: MEDIUM → LOW
  5. 2026-10-16 Affected versions changed · Red Hat
  6. 2026-10-16 CVSS score added · Red Hat
  7. 2026-10-21 Affected versions changed · Red Hat
  8. 2026-11-03 Fix available: dpdk@2:25.11-2.el10_2, dpdk@2:25.11-2.el9_8 · CNA
  9. 2026-11-03 2 new references · CNA
  10. 2026-11-03 Fix available: RHSA-2026:94630 · Red Hat
  11. 2026-11-03 Fix available: RHSA-2026:94629 · Red Hat
  12. 2026-11-03 Fix available: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux AppStream (v. 9) · Red Hat

References

Advisory 2

Other 2

  • TI-2019-15875 Protection mechanism failure in Jenkins Pipeline: Groovy Plugin KEVCVSS 3.1CRITICAL 9.9
  • TI-2019-15874 Protection mechanism failure in Jenkins Script Security Plugin KEVCVSS 3.1CRITICAL 9.9
  • TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-05363 Code injection in Elastic Kibana KEVCVSS 3.1CRITICAL 10.0
  • TI-2019-03949 Out-of-bounds write in ESXi and Horizon DaaS KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-16080 A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153… KEVCVSS 3.1CRITICAL 9.8
See all 7413 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences