CVE-2026-86847Dpdk: dpdk: guest can trigger infinite loop in vhost-crypto writeback chain cleanup
- 6.5MediumCVSS base score
- 0.20%Exploitation in 30 daysEPSS · top 90% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
A flaw was found in DPDK lib/vhost vhost-crypto. Write-back chain cleanup can follow an uninitialized next pointer when mapping a guest descriptor fails, causing the host vhost-crypto process to hang or crash.
Timeline
ID reserved
By redhat
- 36 days later
· 36 days later
Published
- 28 days later
· 28 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| redhatCNA (assigner) | 3.1 | Medium6.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |
| NVDNVD · Awaiting Analysis | 3.1 | Medium6.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.20% · top 90% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Affected products
Red Hat · Red Hat Enterprise Linux 10
- unaffected 2:25.11-2.el10_2 – < *
Red Hat · Red Hat Enterprise Linux 10
- unaffected 2:25.11-2.el10_3 – < *
Red Hat · Red Hat Enterprise Linux 8
- unaffected 0:23.11-3.el8_10 – < *
Red Hat · Red Hat Enterprise Linux 9
- unaffected 2:25.11-2.el9_8 – < *
Red Hat · Red Hat Enterprise Linux 9
- unaffected 2:25.11-2.el9_9 – < *
Red Hat · Fast Datapath for RHEL 10
All versions: affected
Red Hat · Fast Datapath for RHEL 10
All versions: affected
Red Hat · Fast Datapath for RHEL 10
All versions: affected
Red Hat · Fast Datapath for RHEL 8
All versions: affected
Red Hat · Fast Datapath for RHEL 8
All versions: affected
Red Hat · Fast Datapath for RHEL 8
All versions: affected
Red Hat · Fast Datapath for RHEL 8
All versions: affected
Red Hat · Fast Datapath for RHEL 8
All versions: affected
Red Hat · Fast Datapath for RHEL 8
All versions: affected
Red Hat · Fast Datapath for RHEL 8
All versions: affected
Red Hat · Fast Datapath for RHEL 9
All versions: affected
Red Hat · Fast Datapath for RHEL 9
All versions: affected
Red Hat · Fast Datapath for RHEL 9
All versions: affected
Red Hat · Fast Datapath for RHEL 9
All versions: affected
Red Hat · Fast Datapath for RHEL 9
All versions: affected
Red Hat · Fast Datapath for RHEL 9
All versions: affected
Red Hat · Fast Datapath for RHEL 9
All versions: affected
Red Hat · Fast Datapath for RHEL 9
All versions: affected
Red Hat · Fast Datapath for RHEL 9
All versions: affected
Red Hat · Red Hat OpenShift Container Platform 4
All versions: affected
Red Hat · Red Hat OpenShift Container Platform 4
All versions: affected
Red Hat · Red Hat OpenShift Container Platform 4
All versions: affected
Red Hat · Red Hat OpenStack Platform 13 (Queens)
All versions: affected
What to do
Workaround: Do not attach a virtio-crypto vhost-user backend to untrusted guests.
References
References7
- RHSA-2026:94629 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:94630 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:96083 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:98505 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:98616 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2026-86847 (opens in a new tab)vdb-entryx_refsource_REDHAT
- RHBZ#2529847 (opens in a new tab)issue-trackingx_refsource_REDHAT
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-101511 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-86847)Record last updated .