CVE-2026-45782

HIGHPre-NVD 8.98.9—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 96% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
8.9
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.9Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Cloud Hypervisor is a Virtual Machine Monitor for Cloud workloads. From version 21.0 to before version 51.2, a guest can cause a use-after-free in the cloud-hypervisor process by submitting two virtio-block descriptor chains that reuse the same head_index while asynchronous block I/O is enabled (e.g. io_uring, aio). When the kernel completes the duplicate operation before the original, the completion path frees a bounce buffer that the kernel is still actively reading from or writing to, corrupting the freed memory. This issue has been patched in versions 51.2 and 52.0.

CVSS v3
8.9
EG Score
8.9(medium)
EPSS
3.6%
KEV
Not listed

Published

June 10, 2026

Last Modified

June 10, 2026

Advisory Details (5)

Auto-updated Jun 10, 2026
Patch available. Sources: github_commit, github_pr, github_release, github.
github Patch Available

Use-after-free in virtio-block Async I/O Completion · Advisory · cloud-hypervisor/cloud-hypervisor · GitHub

https://github.com/cloud-hypervisor/cloud-hypervisor/security/advisories/GHSA-f47p-p25q-83rh
github_release Patch Available

v52.0

Patch available: cloud-hypervisor/cloud-hypervisor v52.0

https://github.com/cloud-hypervisor/cloud-hypervisor/releases/tag/v52.0
github_release Patch Available

v51.2

Patch available: cloud-hypervisor/cloud-hypervisor v51.2

https://github.com/cloud-hypervisor/cloud-hypervisor/releases/tag/v51.2
github_pr

build: Release v52.0

Fix merged in cloud-hypervisor/cloud-hypervisor PR #8220 on 2026-05-14 — awaiting tagged release

https://github.com/cloud-hypervisor/cloud-hypervisor/pull/8220
github_commit

commit 1314ac883c64 (cloud-hypervisor/cloud-hypervisor)

Fix landed in cloud-hypervisor/cloud-hypervisor commit 1314ac883c64 — awaiting tagged release

https://github.com/cloud-hypervisor/cloud-hypervisor/commit/1314ac883c641f1045bbb06dec0de045a3894baa

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 18× in last 7d / 88× 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 107 total refreshes for this CVE.

  1. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 16:45 UTCEG score recompute
  3. 2026-07-15 03:58 UTCEG score recompute
  4. 2026-07-15 02:00 UTCEPSS rescore
  5. 2026-07-14 15:00 UTCEG score recompute
  6. 2026-07-14 02:31 UTCEG score recompute
  7. 2026-07-13 22:30 UTCEPSS rescore
  8. 2026-07-13 14:03 UTCEG score recompute
  9. 2026-07-13 06:13 UTCEPSS rescore
  10. 2026-07-13 01:09 UTCEG score recompute
  11. 2026-07-12 09:11 UTCEG score recompute
  12. 2026-07-12 05:46 UTCEPSS rescore
  13. 2026-07-11 20:20 UTCEG score recompute
  14. 2026-07-11 08:27 UTCEPSS rescore
  15. 2026-07-11 07:50 UTCEG score recompute
  16. 2026-07-10 19:22 UTCEG score recompute
  17. 2026-07-09 19:10 UTCEPSS rescore
  18. 2026-07-09 11:56 UTCEG score recompute
  19. 2026-07-08 23:28 UTCEG score recompute
  20. 2026-07-08 15:16 UTCEPSS rescore
  21. 2026-07-08 10:59 UTCEG score recompute
  22. 2026-07-07 22:24 UTCEG score recompute
  23. 2026-07-07 13:46 UTCEPSS rescore
  24. 2026-07-06 16:27 UTCEPSS rescore
  25. 2026-07-06 02:53 UTCEG score recompute
Show 75 more
  1. 2026-07-05 14:25 UTCEG score recompute
  2. 2026-07-05 02:30 UTCEPSS rescore
  3. 2026-07-05 01:57 UTCEG score recompute
  4. 2026-07-04 12:48 UTCEG score recompute
  5. 2026-07-04 06:31 UTCEPSS rescore
  6. 2026-07-03 21:06 UTCEG score recompute
  7. 2026-07-03 08:36 UTCEG score recompute
  8. 2026-07-02 19:48 UTCEG score recompute
  9. 2026-07-02 07:19 UTCEG score recompute
  10. 2026-07-01 18:46 UTCEG score recompute
  11. 2026-07-01 15:07 UTCEPSS rescore
  12. 2026-07-01 06:17 UTCEG score recompute
  13. 2026-06-30 23:22 UTCEPSS rescore
  14. 2026-06-30 17:48 UTCEG score recompute
  15. 2026-06-30 05:20 UTCEG score recompute
  16. 2026-06-29 16:08 UTCEG score recompute
  17. 2026-06-29 14:06 UTCEPSS rescore
  18. 2026-06-29 14:06 UTCEPSS rescore
  19. 2026-06-29 03:38 UTCEG score recompute
  20. 2026-06-28 15:03 UTCEG score recompute
  21. 2026-06-28 14:07 UTCEPSS rescore
  22. 2026-06-28 04:56 UTCEPSS rescore
  23. 2026-06-28 04:56 UTCEPSS rescore
  24. 2026-06-28 02:34 UTCEG score recompute
  25. 2026-06-27 14:05 UTCEG score recompute
  26. 2026-06-27 03:08 UTCEPSS rescore
  27. 2026-06-27 01:28 UTCEG score recompute
  28. 2026-06-26 12:59 UTCEG score recompute
  29. 2026-06-26 00:30 UTCEG score recompute
  30. 2026-06-25 13:49 UTCEPSS rescore
  31. 2026-06-25 11:53 UTCEG score recompute
  32. 2026-06-24 23:24 UTCEG score recompute
  33. 2026-06-24 14:05 UTCEPSS rescore
  34. 2026-06-24 10:56 UTCEG score recompute
  35. 2026-06-23 22:26 UTCEG score recompute
  36. 2026-06-23 21:33 UTCEPSS rescore
  37. 2026-06-23 21:33 UTCEPSS rescore
  38. 2026-06-23 08:57 UTCEG score recompute
  39. 2026-06-22 18:35 UTCEG score recompute
  40. 2026-06-22 14:25 UTCEPSS rescore
  41. 2026-06-22 14:25 UTCEPSS rescore
  42. 2026-06-22 04:23 UTCEG score recompute
  43. 2026-06-21 14:56 UTCEPSS rescore
  44. 2026-06-21 14:56 UTCEPSS rescore
  45. 2026-06-21 14:22 UTCEG score recompute
  46. 2026-06-21 01:59 UTCEPSS rescore
  47. 2026-06-21 01:59 UTCEPSS rescore
  48. 2026-06-21 01:35 UTCEG score recompute
  49. 2026-06-20 11:39 UTCEG score recompute
  50. 2026-06-19 23:08 UTCEG score recompute
  51. 2026-06-19 19:26 UTCEPSS rescore
  52. 2026-06-19 19:26 UTCEPSS rescore
  53. 2026-06-19 10:40 UTCEG score recompute
  54. 2026-06-18 22:07 UTCEG score recompute
  55. 2026-06-18 17:52 UTCEPSS rescore
  56. 2026-06-18 17:52 UTCEPSS rescore
  57. 2026-06-18 09:38 UTCEG score recompute
  58. 2026-06-17 20:20 UTCEG score recompute
  59. 2026-06-17 17:53 UTCEPSS rescore
  60. 2026-06-17 07:53 UTCEG score recompute
  61. 2026-06-16 19:24 UTCEG score recompute
  62. 2026-06-16 17:52 UTCEPSS rescore
  63. 2026-06-16 06:57 UTCEG score recompute
  64. 2026-06-15 18:29 UTCEG score recompute
  65. 2026-06-15 17:49 UTCEPSS rescore
  66. 2026-06-15 05:58 UTCEG score recompute
  67. 2026-06-14 17:30 UTCEG score recompute
  68. 2026-06-14 05:02 UTCEG score recompute
  69. 2026-06-13 23:00 UTCEPSS rescore
  70. 2026-06-13 16:33 UTCEG score recompute
  71. 2026-06-13 04:05 UTCEG score recompute
  72. 2026-06-12 23:12 UTCEPSS rescore
  73. 2026-06-12 23:12 UTCEPSS rescore
  74. 2026-06-12 15:36 UTCEG score recompute
  75. 2026-06-12 03:08 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-45782?
CVE-2026-45782 is a high vulnerability published on June 10, 2026. Cloud Hypervisor is a Virtual Machine Monitor for Cloud workloads. From version 21.0 to before version 51.2, a guest can cause a use-after-free in the cloud-hypervisor process by submitting two virtio-block descriptor chains that reuse the same headindex while asynchronous block I/O is enabled…
When was CVE-2026-45782 disclosed?
CVE-2026-45782 was first published in the National Vulnerability Database on June 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45782 actively exploited?
CVE-2026-45782 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-45782?
CVE-2026-45782 has a CVSS v3 base score of 8.9 (NVD).
How do I remediate CVE-2026-45782?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45782, 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

Explore the affected products and dependency analysis for CVE-2026-45782

Explore →

Is Your Infrastructure Affected by CVE-2026-45782?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs