CVE-2026-62426

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH 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(high)
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
12%
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-2026-62426(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(2)

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

Data Freshness Timeline

(refreshed 26× in last 7d / 121× 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 121 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-62426?
CVE-2026-62426 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-2026-62426 disclosed?
CVE-2026-62426 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-2026-62426 actively exploited?
CVE-2026-62426 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 87.7% of all scored CVEs.
What is the CVSS score of CVE-2026-62426?
CVE-2026-62426 has a CVSS v3.1 base score of 8.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-62426?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-62426, 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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