CVE-2026-5367

criticalpriority · track · 0EPSS 0.009 · 59 %ileDEEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.87% (59th) EPSS

CVSS 9.8 · critical

Is it mine?

25 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 8.6–9.8

v3.19.8criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:Nsecondary · ENISA EU

v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:Nsecondary · secalert@redhat.com USexploitability 3.9 · impact 4

v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:Nsecondaryexploitability 3.9 · impact 4

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-122USCWE-130US

affected products (25)

Products and version ranges known to be affected.

Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
Red Hat Enterprise Linux ovn-2021 Fast Datapath 8all versionscert_bundDEcpe:/o:redhat:enterprise_linux:ovn-2021_fast_datapath_8
Red Hat Enterprise Linux ovn23.06 Fast Datapath 8all versionscert_bundDEcpe:/o:redhat:enterprise_linux:ovn23.06_fast_datapath_8
Red Hat Enterprise Linux ovn23.06 Fast Datapath 9all versionscert_bundDEcpe:/o:redhat:enterprise_linux:ovn23.06_fast_datapath_9
Red Hat Enterprise Linux ovn23.09 Fast Datapath 9all versionscert_bundDEcpe:/o:redhat:enterprise_linux:ovn23.09_fast_datapath_9
Red Hat Enterprise Linux ovn24.03 Fast Datapath 9all versionscert_bundDEcpe:/o:redhat:enterprise_linux:ovn24.03_fast_datapath_9
Red Hat Enterprise Linux ovn25.03 Fast Datapath 9all versionscert_bundDEcpe:/o:redhat:enterprise_linux:ovn25.03_fast_datapath_9
Red Hat Enterprise Linux ovn25.09 Fast Datapath 9all versionscert_bundDEcpe:/o:redhat:enterprise_linux:ovn25.09_fast_datapath_9
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
SUSE openSUSEall versionscert_bundDEcpe:/o:suse:opensuse:-
Red Hat Fast Datapath for Red Hat Enterprise Linux 10< 0:25.03.2-100.el10fdpenisa_euvdEU
Red Hat Fast Datapath for Red Hat Enterprise Linux 10< 0:25.09.2-103.el10fdpenisa_euvdEU
Red Hat Fast Datapath for Red Hat Enterprise Linux 8< 0:21.12.0-145.el8fdpenisa_euvdEU
Red Hat Fast Datapath for Red Hat Enterprise Linux 8< 0:23.06.4-30.el8fdpenisa_euvdEU
Red Hat Fast Datapath for Red Hat Enterprise Linux 9< 0:23.06.4-30.el9fdpenisa_euvdEU
Red Hat Fast Datapath for Red Hat Enterprise Linux 9< 0:23.09.6-16.el9fdpenisa_euvdEU
Red Hat Fast Datapath for Red Hat Enterprise Linux 9< 0:24.03.7-82.el9fdpenisa_euvdEU
Red Hat Fast Datapath for Red Hat Enterprise Linux 9< 0:25.03.2-100.el9fdpenisa_euvdEU
Red Hat Fast Datapath for Red Hat Enterprise Linux 9< 0:25.09.2-103.el9fdpenisa_euvdEU
Red Hat, Inc. Red Hat OpenShift Container Platform≤ 4fstec_bduRU

showing 20 of 25

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-1315Fast Datapath für Red Hat Enterprise Linux (ovn): Mehrere SchwachstellenDeutsch2026-04-29csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Fast Datapath für Red Hat Enterprise Linuxausnutzen, um einen Denial of Service Angriff durchzuführen oder vertrauliche Informationen offenzulegen.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund NVD CVE.org MITRE

published 2026-04-24modified 2026-10-26

references (27)

External citations — patches, advisories, analysis.

scry

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