CVE-2026-62434

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2026-07-28. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0

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

A guest started with Populated on Demand enabled (PoD) can attempt to reclaim pages which aren't regular guest RAM. This can cause corruption of memory management state in Xen.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
39(Track)
EG Risk 39/100SSVC: 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
Severity53% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
31%
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-507 - Xen Security Advisories

http://xenbits.xen.org/xsa/advisory-507.html
generic

XSA-507 - Xen Security Advisories

https://xenbits.xenproject.org/xsa/advisory-507.html

Vendor Advisories for CVE-2026-62434(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 17× in last 7d / 82× 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 101 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 14:25 UTCEPSS rescore
  6. 2026-08-27 09:37 UTCEG score recompute
  7. 2026-08-27 09:37 UTCGHSA enrichment
  8. 2026-08-26 14:46 UTCEPSS rescore
  9. 2026-08-26 10:32 UTCEG score recompute
  10. 2026-08-26 10:32 UTCGHSA enrichment
  11. 2026-08-25 13:49 UTCEPSS rescore
  12. 2026-08-25 11:06 UTCEG score recompute
  13. 2026-08-25 11:06 UTCGHSA enrichment
  14. 2026-08-24 12:55 UTCEG score recompute
  15. 2026-08-24 12:55 UTCGHSA enrichment
  16. 2026-08-23 14:44 UTCEG score recompute
  17. 2026-08-23 14:44 UTCGHSA enrichment
  18. 2026-08-23 00:19 UTCEPSS rescore
  19. 2026-08-22 16:34 UTCEG score recompute
  20. 2026-08-22 16:34 UTCGHSA enrichment
  21. 2026-08-21 23:49 UTCEPSS rescore
  22. 2026-08-21 18:17 UTCEG score recompute
  23. 2026-08-21 18:17 UTCGHSA enrichment
  24. 2026-08-20 22:55 UTCEPSS rescore
  25. 2026-08-20 20:06 UTCGHSA enrichment
Show 75 more
  1. 2026-08-19 21:56 UTCEG score recompute
  2. 2026-08-19 21:56 UTCGHSA enrichment
  3. 2026-08-19 17:04 UTCEPSS rescore
  4. 2026-08-18 23:43 UTCEG score recompute
  5. 2026-08-18 23:43 UTCGHSA enrichment
  6. 2026-08-18 13:48 UTCEPSS rescore
  7. 2026-08-18 01:32 UTCEG score recompute
  8. 2026-08-18 01:32 UTCGHSA enrichment
  9. 2026-08-17 13:47 UTCEPSS rescore
  10. 2026-08-17 03:22 UTCEG score recompute
  11. 2026-08-17 03:22 UTCGHSA enrichment
  12. 2026-08-16 14:56 UTCEPSS rescore
  13. 2026-08-16 05:11 UTCEG score recompute
  14. 2026-08-16 05:11 UTCGHSA enrichment
  15. 2026-08-15 07:01 UTCEG score recompute
  16. 2026-08-15 07:01 UTCGHSA enrichment
  17. 2026-08-15 01:30 UTCEPSS rescore
  18. 2026-08-14 08:41 UTCEG score recompute
  19. 2026-08-14 08:41 UTCGHSA enrichment
  20. 2026-08-13 22:00 UTCEPSS rescore
  21. 2026-08-13 10:30 UTCEG score recompute
  22. 2026-08-13 10:30 UTCGHSA enrichment
  23. 2026-08-12 13:51 UTCEPSS rescore
  24. 2026-08-12 12:19 UTCGHSA enrichment
  25. 2026-08-11 14:08 UTCEG score recompute
  26. 2026-08-11 14:08 UTCGHSA enrichment
  27. 2026-08-11 00:00 UTCEPSS rescore
  28. 2026-08-10 15:57 UTCGHSA enrichment
  29. 2026-08-09 17:43 UTCEG score recompute
  30. 2026-08-09 17:43 UTCGHSA enrichment
  31. 2026-08-09 13:47 UTCEPSS rescore
  32. 2026-08-08 19:33 UTCEG score recompute
  33. 2026-08-08 19:33 UTCGHSA enrichment
  34. 2026-08-08 16:37 UTCEPSS rescore
  35. 2026-08-07 21:22 UTCEG score recompute
  36. 2026-08-07 21:22 UTCGHSA enrichment
  37. 2026-08-06 23:11 UTCEG score recompute
  38. 2026-08-06 23:11 UTCGHSA enrichment
  39. 2026-08-06 13:47 UTCEPSS rescore
  40. 2026-08-06 01:01 UTCEG score recompute
  41. 2026-08-06 01:01 UTCGHSA enrichment
  42. 2026-08-05 19:17 UTCEPSS rescore
  43. 2026-08-05 19:17 UTCEPSS rescore
  44. 2026-08-05 02:50 UTCEG score recompute
  45. 2026-08-05 02:50 UTCGHSA enrichment
  46. 2026-08-04 15:10 UTCEPSS rescore
  47. 2026-08-04 10:39 UTCEPSS rescore
  48. 2026-08-04 04:40 UTCGHSA enrichment
  49. 2026-08-03 06:29 UTCGHSA enrichment
  50. 2026-08-02 08:19 UTCEG score recompute
  51. 2026-08-02 08:19 UTCGHSA enrichment
  52. 2026-08-02 02:27 UTCEPSS rescore
  53. 2026-08-01 10:08 UTCEG score recompute
  54. 2026-08-01 10:08 UTCGHSA enrichment
  55. 2026-08-01 04:16 UTCEPSS rescore
  56. 2026-07-31 11:58 UTCEG score recompute
  57. 2026-07-31 11:58 UTCGHSA enrichment
  58. 2026-07-30 16:28 UTCEPSS rescore
  59. 2026-07-30 13:47 UTCEG score recompute
  60. 2026-07-30 13:47 UTCGHSA enrichment
  61. 2026-07-30 01:30 UTCEPSS rescore
  62. 2026-07-30 01:30 UTCEPSS rescore
  63. 2026-07-29 15:35 UTCEG score recompute
  64. 2026-07-29 15:35 UTCGHSA enrichment
  65. 2026-07-28 17:23 UTCGHSA enrichment
  66. 2026-07-28 16:56 UTCGHSA enrichment
  67. 2026-07-28 16:21 UTCGHSA enrichment
  68. 2026-07-28 16:19 UTCNVD updateCVSS v3 → 5.3 · severity → MEDIUM
  69. 2026-07-28 16:19 UTCNVD update
  70. 2026-07-28 15:30 UTCEG score recompute▲ 5.30
  71. 2026-07-28 15:29 UTCMITRE cvelistV5CVSS v3 → 5.3 · severity → MEDIUM
  72. 2026-07-28 14:34 UTCNVD update
  73. 2026-07-28 13:43 UTCMITRE cvelistV5
  74. 2026-07-28 13:31 UTCNVD update
  75. 2026-07-28 13:05 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-62434?
CVE-2026-62434 is a medium vulnerability published on July 28, 2026. A guest started with Populated on Demand enabled (PoD) can attempt to reclaim pages which aren't regular guest RAM. This can cause corruption of memory management state in Xen.
When was CVE-2026-62434 disclosed?
CVE-2026-62434 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-2026-62434 actively exploited?
CVE-2026-62434 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 69.5% of all scored CVEs.
What is the CVSS score of CVE-2026-62434?
CVE-2026-62434 has a CVSS v3.1 base score of 5.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-62434?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-62434, 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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