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TI-2026-04696 Aliases CVE-2026-5367GHSA-r8vj-9qgr-m84x

Ovn: ovn: information disclosure via crafted dhcpv6 packets

Priority MEDIUM 45CWE-130Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · None
Fix status
Partial Red Hat: 3 fixed, 3 without a fix

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

Summary

A flaw was found in OVN (Open Virtual Network). A remote attacker, by sending crafted DHCPv6 (Dynamic Host Configuration Protocol for IPv6) SOLICIT packets with an inflated Client ID length, could cause the ovn-controller to read beyond the bounds of a packet. This out-of-bounds read can lead to the disclosure of sensitive information stored in heap memory, which is then returned to the attacker's virtual machine port.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00868 58th percentileScored 2026-11-07
Fix Partial Red Hat: 9 advisoriesRed Hat: 3 fixed, 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
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 HatFast Datapath for Red Hat Enterprise Linux 10—25.03.2-100.el10fdpPatch availableCNA
Red HatFast Datapath for Red Hat Enterprise Linux 10—25.09.2-103.el10fdpPatch availableCNA
Red HatFast Datapath for Red Hat Enterprise Linux 8—21.12.0-145.el8fdpPatch availableCNA
Red HatFast Datapath for Red Hat Enterprise Linux 8—23.06.4-30.el8fdpPatch availableCNA
Red HatFast Datapath for Red Hat Enterprise Linux 9—23.06.4-30.el9fdpPatch availableCNA
Red HatFast Datapath for Red Hat Enterprise Linux 9—23.09.6-16.el9fdpPatch availableCNA
Red HatFast Datapath for Red Hat Enterprise Linux 9—24.03.7-82.el9fdpPatch availableCNA
Red HatFast Datapath for Red Hat Enterprise Linux 9—25.03.2-100.el9fdpPatch availableCNA
Red HatFast Datapath for Red Hat Enterprise Linux 9—25.09.2-103.el9fdpPatch availableCNA
Red HatFast Datapath for RHEL 8——Not affectedCNA
Red HatFast Datapath for RHEL 8——Not affectedCNA
Red HatFast Datapath for RHEL 8——Not affectedCNA
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 HatRed Hat OpenShift Container Platform 4——Not affectedCNA
Red HatRed Hat OpenShift Container Platform 4——Not affectedCNA
Red HatRed Hat OpenShift Container Platform 4——Not affectedCNA
Red HatRed Hat OpenShift Container Platform 4——Not affectedCNA
Red HatRed Hat OpenShift Container Platform 4——No fix listedCNA
Red HatRed Hat OpenShift Container Platform 4——Not affectedCNA
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
  • Fast Datapath for Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in 25.03.2-100.el10fdp Patch available CNA
  • Fast Datapath for Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in 25.09.2-103.el10fdp Patch available CNA
  • Fast Datapath for Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 21.12.0-145.el8fdp Patch available CNA
  • Fast Datapath for Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 23.06.4-30.el8fdp Patch available CNA
  • Fast Datapath for Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 23.06.4-30.el9fdp Patch available CNA
  • Fast Datapath for Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 23.09.6-16.el9fdp Patch available CNA
  • Fast Datapath for Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 24.03.7-82.el9fdp Patch available CNA
  • Fast Datapath for Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 25.03.2-100.el9fdp Patch available CNA
  • Fast Datapath for Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 25.09.2-103.el9fdp Patch available CNA
  • Fast Datapath for RHEL 8 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Fast Datapath for RHEL 8 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Fast Datapath for RHEL 8 VendorRed Hat Affected — Fixed in — Not affected 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
  • Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — Not affected 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 — Not affected 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

CPE names CNA · 4

CPEVersionsRoleVendor
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:openshift:44—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:openshift:4 Versions 4 — ·Red Hat

Remediation

Red Hat 9 advisories

  • RHSA-2026:22110 Released 2026-06-01 · Red Hat rating Important
    ovn25.03 security update
    • Fast Datapath for Red Hat Enterprise Linux 10 ovn25.03-25.03.2-100.el10fdp, ovn25.03-central-25.03.2-100.el10fdp, ovn25.03-host-25.03.2-100.el10fdp +1
  • RHSA-2026:22111 Released 2026-06-01 · Red Hat rating Important
    ovn25.09 security update
    • Fast Datapath for Red Hat Enterprise Linux 10 ovn25.09-25.09.2-103.el10fdp, ovn25.09-central-25.09.2-103.el10fdp, ovn25.09-host-25.09.2-103.el10fdp +1
  • RHSA-2026:11700 Released 2026-04-29 · Red Hat rating Important
    ovn24.03 security update
    • Fast Datapath for Red Hat Enterprise Linux 9 ovn24.03-24.03.7-82.el9fdp, ovn24.03-central-24.03.7-82.el9fdp, ovn24.03-host-24.03.7-82.el9fdp +1
Show 6 more Red Hat advisories
  • RHSA-2026:11702 Released 2026-04-29 · Red Hat rating Important
    ovn25.09 security update
    • Fast Datapath for Red Hat Enterprise Linux 9 ovn25.09-25.09.2-103.el9fdp, ovn25.09-central-25.09.2-103.el9fdp, ovn25.09-host-25.09.2-103.el9fdp +1
  • RHSA-2026:11701 Released 2026-04-29 · Red Hat rating Important
    ovn25.03 security update
    • Fast Datapath for Red Hat Enterprise Linux 9 ovn25.03-25.03.2-100.el9fdp, ovn25.03-central-25.03.2-100.el9fdp, ovn25.03-host-25.03.2-100.el9fdp +1
  • RHSA-2026:11698 Released 2026-04-29 · Red Hat rating Important
    ovn23.09 security update
    • Fast Datapath for Red Hat Enterprise Linux 9 ovn23.09-23.09.6-16.el9fdp, ovn23.09-central-23.09.6-16.el9fdp, ovn23.09-host-23.09.6-16.el9fdp +1
  • RHSA-2026:11696 Released 2026-04-29 · Red Hat rating Important
    ovn23.06 security update
    • Fast Datapath for Red Hat Enterprise Linux 9 ovn23.06-23.06.4-30.el9fdp, ovn23.06-central-23.06.4-30.el9fdp, ovn23.06-host-23.06.4-30.el9fdp +1
  • RHSA-2026:11695 Released 2026-04-29 · Red Hat rating Important
    ovn23.06 security update
    • Fast Datapath for Red Hat Enterprise Linux 8 ovn23.06-23.06.4-30.el8fdp, ovn23.06-central-23.06.4-30.el8fdp, ovn23.06-host-23.06.4-30.el8fdp +1
  • RHSA-2026:11694 Released 2026-04-29 · Red Hat rating Important
    ovn-2021 security update
    • Fast Datapath for Red Hat Enterprise Linux 8 ovn-2021-21.12.0-145.el8fdp, ovn-2021-central-21.12.0-145.el8fdp, ovn-2021-host-21.12.0-145.el8fdp +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 8, Fast Datapath for RHEL 9 and 3 more products — RHSA-2026:11694

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-04600 Ovn: ovn: heap over-read in icmp error response generationPriority LOW 30
    Show all 2 records → Advisory →
  • Advisory ·

    Red Hat Fast Datapath for RHEL 8, Fast Datapath for RHEL 9 and 3 more products — RHSA-2026:11695

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-04600 Ovn: ovn: heap over-read in icmp error response generationPriority LOW 30
    Show all 2 records → Advisory →
Show 7 more groups
  • Advisory ·

    Red Hat Fast Datapath for RHEL 8, Fast Datapath for RHEL 9 and 3 more products — RHSA-2026:11696

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-04600 Ovn: ovn: heap over-read in icmp error response generationPriority LOW 30
    Show all 2 records → Advisory →
  • Advisory ·

    Red Hat Fast Datapath for RHEL 8, Fast Datapath for RHEL 9 and 3 more products — RHSA-2026:11698

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-04600 Ovn: ovn: heap over-read in icmp error response generationPriority LOW 30
    Show all 2 records → Advisory →
  • Advisory ·

    Red Hat Fast Datapath for RHEL 8, Fast Datapath for RHEL 9 and 3 more products — RHSA-2026:11700

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-04600 Ovn: ovn: heap over-read in icmp error response generationPriority LOW 30
    Show all 2 records → Advisory →
  • Advisory ·

    Red Hat Fast Datapath for RHEL 8, Fast Datapath for RHEL 9 and 3 more products — RHSA-2026:11701

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-04600 Ovn: ovn: heap over-read in icmp error response generationPriority LOW 30
    Show all 2 records → Advisory →
  • Advisory ·

    Red Hat Fast Datapath for RHEL 8, Fast Datapath for RHEL 9 and 3 more products — RHSA-2026:11702

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-04600 Ovn: ovn: heap over-read in icmp error response generationPriority LOW 30
    Show all 2 records → Advisory →
  • Advisory ·

    Red Hat Fast Datapath for RHEL 8, Fast Datapath for RHEL 9 and 3 more products — RHSA-2026:22110

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-04600 Ovn: ovn: heap over-read in icmp error response generationPriority LOW 30
    Show all 2 records → Advisory →
  • Advisory ·

    Red Hat Fast Datapath for RHEL 8, Fast Datapath for RHEL 9 and 3 more products — RHSA-2026:22111

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-04600 Ovn: ovn: heap over-read in icmp error response generationPriority LOW 30
    Show all 2 records → Advisory →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Fast Datapath for RHEL 8AffectedNo fix yet
Fast Datapath for RHEL 9AffectedNo fix yet
Red Hat OpenShift Container Platform 4AffectedNo fix yet
Fast Datapath for Red Hat Enterprise Linux 10Fixed RHSA-2026:22110, RHSA-2026:22111
Fast Datapath for Red Hat Enterprise Linux 8Fixed RHSA-2026:11694, RHSA-2026:11695
Fast Datapath for Red Hat Enterprise Linux 9Fixed RHSA-2026:11696, RHSA-2026:11698, RHSA-2026:11700, RHSA-2026:11701, RHSA-2026:11702
Not affected: 2 products
  • Fast Datapath for RHEL 8
  • Red Hat OpenShift Container Platform 4

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-5367
  2. 2026-10-03 Alias added: GHSA-r8vj-9qgr-m84x

References

Advisory 9

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