CVE-2026-62428

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-28. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

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

When grant-copy operations are processed, the respective grant may or may not already be in use by another operation (a mapping or another copy). For all copy operations the referenced guest frame is looked up. When another operation is already active for the grant (the grant is "pinned"), what is being supplied back to actually carry out permission checks and copy operation may not be consistent: The permission check may be carried out on a page different from the one involved in the copy.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

July 28, 2026

Last Modified

July 28, 2026

Advisory Details (2)

Auto-updated Jul 28, 2026
No patch confirmed yet.
generic

XSA-500 - Xen Security Advisories

http://xenbits.xen.org/xsa/advisory-500.html
generic

XSA-500 - Xen Security Advisories

https://xenbits.xenproject.org/xsa/advisory-500.html

Vendor Advisories for CVE-2026-62428(1)

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

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
xen4.14.2+25-gb6a8c4f72d-2 ... 4.20.3+127-gc42374a105-1 (46 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
xen4.17.1+2-gb773c48e36-1 ... 4.20.3+127-gc42374a105-1 (25 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
xen4.20.0+68-g35cb38b222-1 ... 4.20.3+127-gc42374a105-1 (7 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
xen4.20.0+68-g35cb38b222-1, 4.20.2+37-g61ff35323e-1, 4.20.2+7-g1badcf5035-1, 4.20.2+7-g1badcf5035-24.20.3+127-gc42374a105-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 20× in last 7d / 100× 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 122 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-62428?
CVE-2026-62428 is a high vulnerability published on July 28, 2026. When grant-copy operations are processed, the respective grant may or may not already be in use by another operation (a mapping or another copy). For all copy operations the referenced guest frame is looked up. When another operation is already active for the grant (the grant is "pinned"), what is…
When was CVE-2026-62428 disclosed?
CVE-2026-62428 was first published in the National Vulnerability Database on July 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-62428 actively exploited?
CVE-2026-62428 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 98.3% of all scored CVEs.
What is the CVSS score of CVE-2026-62428?
CVE-2026-62428 has a CVSS v3.1 base score of 7.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-62428?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-62428, 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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