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CVE.org (no NVD analysis yet)· CNA redhat

CVE-2026-86848: Dpdk: dpdk: time-of-check/time-of-use vulnerability allowing guest-triggered out-of-bounds write in vhost-crypto

Noroxi assessment

Priority: Monitor (action score 35/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.10% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: dpdk (AlmaLinux:10) 2:25.11-2.el10_2; dpdk-devel (AlmaLinux:10) 2:25.11-2.el10_2; dpdk-doc (AlmaLinux:10) 2:25.11-2.el10_2.

Low priority for now. Upgrade to dpdk (AlmaLinux:10) 2:25.11-2.el10_2; dpdk-devel (AlmaLinux:10) 2:25.11-2.el10_2; dpdk-doc (AlmaLinux:10) 2:25.11-2.el10_2 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A flaw was found in DPDK lib/vhost vhost-crypto. The indirect-descriptor snapshot double-fetches a guest descriptor next index, allowing a malicious guest to cause an out-of-bounds access in the host backend.

HighCVSS 8.8 · v3.1—No exploit Fix available
Published
Oct 14, 2026
Updated
Nov 11, 2026
EPSS
0.1% · 1th percentile

Report tools

JSON

Action score

35

Monitor

Low priority for now.

CVSS
35 / 40 · 8.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · redhat
8.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-86848

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • Red Hat Fast Datapath for RHEL 10

    • all versionsaffected
    • all versionsaffected
    • all versionsaffected

  • Red Hat Fast Datapath for RHEL 8

    • all versionsaffected
    • all versionsaffected
    • all versionsaffected
    • all versionsaffected
    • all versionsaffected
    • all versionsaffected
    • all versionsaffected

  • Red Hat Fast Datapath for RHEL 9

    • all versionsaffected
    • all versionsaffected
    • all versionsaffected
    • all versionsaffected
    • all versionsaffected
    • all versionsaffected
    • all versionsaffected
    • all versionsaffected
    • all versionsaffected

  • Red Hat Red Hat Enterprise Linux 10

    • 2:25.11-2.el10_2 and laternot affected · rpm
    • 2:25.11-2.el10_3 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8

    • 0:23.11-3.el8_10 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 9

    • 2:25.11-2.el9_8 and laternot affected · rpm
    • 2:25.11-2.el9_9 and laternot affected · rpm

  • Red Hat Red Hat OpenShift Container Platform 4

    • all versionsunknown
    • all versionsunknown
    • all versionsunknown

  • Red Hat Red Hat OpenStack Platform 13 (Queens)

    • all versionsaffected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:10dpdkbefore 2:25.11-2.el10_22:25.11-2.el10_2
AlmaLinux:10dpdk-develbefore 2:25.11-2.el10_22:25.11-2.el10_2
AlmaLinux:10dpdk-docbefore 2:25.11-2.el10_22:25.11-2.el10_2
AlmaLinux:10dpdk-toolsbefore 2:25.11-2.el10_22:25.11-2.el10_2
AlmaLinux:8dpdkbefore 23.11-3.el8_1023.11-3.el8_10
AlmaLinux:8dpdk-develbefore 23.11-3.el8_1023.11-3.el8_10
AlmaLinux:8dpdk-docbefore 23.11-3.el8_1023.11-3.el8_10
AlmaLinux:8dpdk-toolsbefore 23.11-3.el8_1023.11-3.el8_10
AlmaLinux:9dpdkbefore 2:25.11-2.el9_82:25.11-2.el9_8
AlmaLinux:9dpdk-develbefore 2:25.11-2.el9_82:25.11-2.el9_8
AlmaLinux:9dpdk-docbefore 2:25.11-2.el9_82:25.11-2.el9_8
AlmaLinux:9dpdk-toolsbefore 2:25.11-2.el9_82:25.11-2.el9_8
Debian:12dpdkfrom 0—
Debian:13dpdkbefore 24.11.8-0+deb13u124.11.8-0+deb13u1
Debian:14dpdkbefore 25.11.4-125.11.4-1
openSUSE:Tumbleweeddpdkbefore 25.11.4-1.125.11.4-1.1
Rocky Linux:10dpdkbefore 2:25.11-2.el10_22:25.11-2.el10_2
Rocky Linux:8dpdkbefore 0:23.11-3.el8_100:23.11-3.el8_10
Rocky Linux:9dpdkbefore 2:25.11-2.el9_82:25.11-2.el9_8
SUSE:Linux Enterprise Micro 5.5dpdk22before 22.11.11-150500.5.16.122.11.11-150500.5.16.1
SUSE:Linux Enterprise Micro 5.5dpdk22-thunderxbefore 22.11.11-150500.5.16.122.11.11-150500.5.16.1

Same product

red hat: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-86567Dpdk: dpdk: vduse handler fails to invalidate vring pointers when iotlb is invalidated, leading to use-after-unmap
    35Monitor
  • CVE-2026-100236Dpdk: dpdk: heap out-of-bounds read/write in gso header copy
    34Monitor
  • CVE-2026-86565Dpdk: dpdk: guest can desynchronize virtqueue size from inflight descriptor table size, causing out-of-bounds write
    32Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2026-86846Oct 14, 2026 · Dpdk: dpdk: guest can trigger out-of-bounds write by controlling avail ring index in vhost-crypto
    26Monitor
  • ← EarlierCVE-2026-86847Oct 14, 2026 · Dpdk: dpdk: guest can trigger infinite loop in vhost-crypto writeback chain cleanup
    26Monitor
  • Later →CVE-2026-86849Oct 14, 2026 · Dpdk: dpdk: integer overflow combined with missing validation leads to host buffer overflow in vhost-crypto
    26Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
almalinux:dpdk2:25.11-2.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:dpdk-devel2:25.11-2.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:dpdk-doc2:25.11-2.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:dpdk-tools2:25.11-2.el9_8 · AlmaLinux:9Package registry (OSV)
debian:dpdk24.11.8-0+deb13u1 · Debian:13Package registry (OSV)
debian:dpdk25.11.4-1 · Debian:14Package registry (OSV)
opensuse:dpdk25.11.4-1.1 · openSUSE:TumbleweedPackage registry (OSV)
rocky linux:dpdk2:25.11-2.el9_8 · Rocky Linux:9Package registry (OSV)
suse:dpdk2222.11.11-150500.5.16.1 · SUSE:Linux Enterprise Micro 5.5Package registry (OSV)
suse:dpdk22-thunderx22.11.11-150500.5.16.1 · SUSE:Linux Enterprise Micro 5.5Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. Fix recorded+3 d
  3. TodayNov 11, 2026+28 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-936830 days apartDpdk: dpdk: guest-triggered out-of-bounds walk via vhost indirect descriptor length toctou
    25Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-367 · Time-of-check Time-of-use (TOCTOU) Race Condition

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓
  2. SSVC exploitation— → none
  3. Exploit maturity— → none

For records you follow, these changes also arrive as notifications. →

References

Show all references (6 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records