CVE-2026-5367

HIGHPre-NVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

Score 8.6 from GitHub Security Advisory (severity: HIGH) published 2026-04-24. NVD baseline CVSS 8.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.6
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 8.6Exploit: NoneExposed: 0

A fix is available — apply it.

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 v3
8.6
EG Score
8.6(medium)
EPSS
54.6%
KEV
Not listed

Published

April 24, 2026

Last Modified

July 15, 2026

Advisory Details (10)

Auto-updated Apr 29, 2026
Patch available. Sources: redhat.
generic

oss-security - [ADVISORY] CVE-2026-5367: Heap over-read in OVN DHCPv6 Client ID processing

http://www.openwall.com/lists/oss-security/2026/04/20/3
redhat Patch Available

2455863 – (CVE-2026-5367) CVE-2026-5367 ovn: OVN: Information disclosure via crafted DHCPv6 packets

Affected: Red Hat Enterprise Linux 8

https://bugzilla.redhat.com/show_bug.cgi?id=2455863
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-5367
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.

https://access.redhat.com/errata/RHSA-2026:11702
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.

https://access.redhat.com/errata/RHSA-2026:11701
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.

https://access.redhat.com/errata/RHSA-2026:11700
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.

https://access.redhat.com/errata/RHSA-2026:11698
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.

https://access.redhat.com/errata/RHSA-2026:11696
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.

https://access.redhat.com/errata/RHSA-2026:11695
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.

https://access.redhat.com/errata/RHSA-2026:11694

Vendor Advisories for CVE-2026-5367(10)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(9)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatovn25.03-0:25.03.2-100.el10fdp2026-06-01redhat
redhatovn25.09-0:25.09.2-103.el10fdp2026-06-01redhat
redhatovn25.03-0:25.03.2-100.el9fdp2026-04-29redhat
redhatovn25.09-0:25.09.2-103.el9fdp2026-04-29redhat
redhatovn23.06-0:23.06.4-30.el8fdp2026-04-29redhat
redhatovn-2021-0:21.12.0-145.el8fdp2026-04-29redhat
redhatovn23.06-0:23.06.4-30.el9fdp2026-04-29redhat
redhatovn24.03-0:24.03.7-82.el9fdp2026-04-29redhat
redhatovn23.09-0:23.09.6-16.el9fdp2026-04-29redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 46× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 159 total refreshes for this CVE.

  1. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 02:00 UTCEPSS rescore
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  17. 2026-07-06 16:27 UTCEPSS rescore
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  21. 2026-07-05 02:31 UTCEPSS rescore
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  1. 2026-06-30 23:22 UTCEPSS rescore
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  3. 2026-06-28 14:07 UTCEPSS rescore
  4. 2026-06-28 04:56 UTCEPSS rescore
  5. 2026-06-27 03:08 UTCEPSS rescore
  6. 2026-06-25 13:49 UTCEPSS rescore
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  8. 2026-06-23 21:33 UTCEPSS rescore
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  10. 2026-06-22 14:25 UTCEPSS rescore
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  22. 2026-06-15 17:49 UTCEPSS rescore
  23. 2026-06-15 17:49 UTCEPSS rescore
  24. 2026-06-14 23:23 UTCEG score recompute
  25. 2026-06-14 23:23 UTCVendor advisory
  26. 2026-06-14 23:23 UTCGHSA enrichment
  27. 2026-06-14 23:18 UTCEPSS rescore
  28. 2026-06-14 12:03 UTCEG score recompute
  29. 2026-06-14 12:03 UTCVendor advisory
  30. 2026-06-14 12:03 UTCGHSA enrichment
  31. 2026-06-13 23:00 UTCEPSS rescore
  32. 2026-06-12 23:12 UTCEPSS rescore
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  34. 2026-06-12 12:33 UTCEG score recompute
  35. 2026-06-12 12:33 UTCVendor advisory
  36. 2026-06-12 12:33 UTCGHSA enrichment
  37. 2026-06-12 01:21 UTCEG score recompute
  38. 2026-06-12 01:21 UTCVendor advisory
  39. 2026-06-12 01:21 UTCGHSA enrichment
  40. 2026-06-11 14:07 UTCEG score recompute
  41. 2026-06-11 14:07 UTCVendor advisory
  42. 2026-06-11 14:07 UTCGHSA enrichment
  43. 2026-06-11 14:00 UTCEPSS rescore
  44. 2026-06-10 22:20 UTCEG score recompute
  45. 2026-06-10 22:20 UTCVendor advisory
  46. 2026-06-10 22:20 UTCGHSA enrichment
  47. 2026-06-10 22:19 UTCEPSS rescore
  48. 2026-06-10 13:22 UTCEPSS rescore
  49. 2026-06-10 11:07 UTCEG score recompute
  50. 2026-06-10 11:07 UTCVendor advisory
  51. 2026-06-10 11:07 UTCGHSA enrichment
  52. 2026-06-09 23:54 UTCEG score recompute
  53. 2026-06-09 23:54 UTCVendor advisory
  54. 2026-06-09 23:54 UTCGHSA enrichment
  55. 2026-06-09 12:23 UTCEG score recompute
  56. 2026-06-09 12:23 UTCVendor advisory
  57. 2026-06-09 12:23 UTCGHSA enrichment
  58. 2026-06-09 01:00 UTCEG score recompute
  59. 2026-06-09 01:00 UTCVendor advisory
  60. 2026-06-09 01:00 UTCGHSA enrichment
  61. 2026-06-08 14:17 UTCEPSS rescore
  62. 2026-06-08 06:10 UTCEG score recompute
  63. 2026-06-08 06:10 UTCVendor advisory
  64. 2026-06-08 06:10 UTCGHSA enrichment
  65. 2026-06-07 18:58 UTCEG score recompute
  66. 2026-06-07 18:58 UTCVendor advisory
  67. 2026-06-07 18:58 UTCGHSA enrichment
  68. 2026-06-07 15:25 UTCEPSS rescore
  69. 2026-06-07 07:44 UTCEG score recompute
  70. 2026-06-07 07:44 UTCVendor advisory
  71. 2026-06-07 07:44 UTCGHSA enrichment
  72. 2026-06-06 20:32 UTCEG score recompute
  73. 2026-06-06 20:32 UTCVendor advisory
  74. 2026-06-06 20:32 UTCGHSA enrichment
  75. 2026-06-06 13:47 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-5367?
CVE-2026-5367 is a high vulnerability published on April 24, 2026. 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…
When was CVE-2026-5367 disclosed?
CVE-2026-5367 was first published in the National Vulnerability Database on April 24, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-5367 actively exploited?
CVE-2026-5367 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 54.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-5367?
CVE-2026-5367 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2026-5367?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-5367, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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