CVE-2026-62427

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-28. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

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

[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.]

To manage the system, sysctl and platform operations are used by the control domain or a possible Xenstore domain. Some of these operations may not be executed in parallel, so a system-wide lock each is used. The way those locks are acquired is, however, not providing any fairness. Furthermore, with XSM/Flask in use, the lock acquire will, for some operations, occur ahead of any permission checking.

The sysctl issue is CVE-2026-62426.

The platform-op issue is CVE-2026-62427.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity88% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
15%
KEV
Not listed

Published

July 28, 2026

Last Modified

July 28, 2026

Advisory Details (1)

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

XSA-499 - Xen Security Advisories

https://xenbits.xenproject.org/xsa/advisory-499.html

Vendor Advisories for CVE-2026-62427(1)

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

Affected Packages

(8 across 8 ecosystems)
Alpine:v3.21(1)
PackageVulnerable rangeFixed inDependents
xen—4.19.6-r0—
Alpine:v3.22(1)
PackageVulnerable rangeFixed inDependents
xen—4.20.4-r0—
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
xen—4.20.4-r0—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
xen—4.21.2-r0—
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 ... 4.20.2+7-g1badcf5035-2 (6 versions)4.20.3+127-gc42374a105-0+deb13u1—
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(2)

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

Data Freshness Timeline

(refreshed 18× in last 7d / 86× 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 169 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-62427?
CVE-2026-62427 is a high vulnerability published on July 28, 2026. [This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] To manage the system, sysctl and platform operations are used by the control domain or a possible Xenstore domain. Some of these operations may not be executed in…
When was CVE-2026-62427 disclosed?
CVE-2026-62427 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-2026-62427 actively exploited?
CVE-2026-62427 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 84.9% of all scored CVEs.
What is the CVSS score of CVE-2026-62427?
CVE-2026-62427 has a CVSS v3.1 base score of 8.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-62427?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-62427, 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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