CVE-2026-62434

MEDIUMPre-NVD 5.35.3
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

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 (Vulnrichment) CVSS v3.1, EPSS, GitHub Security Advisory
5.3EG
EchelonGraph verdictMonitorRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 5.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
5.3MEDIUMmedium confidence
EG Risk
39
EG Risk 39/100

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 (value × EchelonGraph’s weight)
Severity53% × 45%
The EG Score, 5.3 of 10.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.4%
EPSS %ILE
29th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 28, 2026

Last Modified

July 28, 2026

Advisory Details (2)

Auto-updated Jul 28, 2026
Patch available.
Web page

XSA-507 - Xen Security Advisories

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

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

(8 across 8 ecosystems)
Alpine:v3.21(1)
PackageVulnerable rangeFix by version rangeDependents
xen—
  • every version up to 4.19.6-r0: fixed in 4.19.6-r0
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
xen—
  • every version up to 4.20.4-r0: fixed in 4.20.4-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
xen—
  • every version up to 4.20.4-r0: fixed in 4.20.4-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
xen—
  • every version up to 4.21.2-r0: fixed in 4.21.2-r0
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
xen4.14.2+25-gb6a8c4f72d-2 ... 4.20.3+127-gc42374a105-1 (46 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
xen4.17.1+2-gb773c48e36-1 ... 4.17.5+72-g01140da4e8-1 (14 versions)
  • every version up to 4.17.7-0+deb12u1: fixed in 4.17.7-0+deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
xen4.20.0+68-g35cb38b222-1 ... 4.20.2+7-g1badcf5035-2 (6 versions)
  • every version up to 4.20.3+127-gc42374a105-0+deb13u1: fixed in 4.20.3+127-gc42374a105-0+deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
xen4.20.0+68-g35cb38b222-1, 4.20.2+37-g61ff35323e-1, 4.20.2+7-g1badcf5035-1, 4.20.2+7-g1badcf5035-2
  • every version up to 4.20.3+127-gc42374a105-1: fixed in 4.20.3+127-gc42374a105-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 55× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 99 of 190 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 91 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  3. 2026-10-12 15:49 UTCEG score recompute
  4. 2026-10-11 19:34 UTCEG score recompute
  5. 2026-10-11 16:49 UTCEG score recompute
  6. 2026-10-11 14:11 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  10. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  12. 2026-10-07 00:06 UTCEG score recompute
  13. 2026-10-07 00:06 UTCGHSA enrichmentGHSA-q4cr-q8pj-wgf3 · GitHub CVSS 5.3
  14. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  15. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  16. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  17. 2026-10-04 07:10 UTCEG score recompute
  18. 2026-10-04 07:10 UTCGHSA enrichmentGHSA-q4cr-q8pj-wgf3 · GitHub CVSS 5.3
  19. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  20. 2026-10-02 18:24 UTCEG score recompute
  21. 2026-10-02 18:24 UTCGHSA enrichmentGHSA-q4cr-q8pj-wgf3 · GitHub CVSS 5.3
  22. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  23. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  24. 2026-10-01 03:44 UTCEG score recompute
  25. 2026-10-01 03:44 UTCGHSA enrichmentGHSA-q4cr-q8pj-wgf3 · GitHub CVSS 5.3
Show 74 more
  1. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  2. 2026-09-29 07:47 UTCEG score recompute
  3. 2026-09-29 07:47 UTCGHSA enrichmentGHSA-q4cr-q8pj-wgf3 · GitHub CVSS 5.3
  4. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  5. 2026-09-28 03:24 UTCEG score recompute
  6. 2026-09-28 03:24 UTCGHSA enrichmentGHSA-q4cr-q8pj-wgf3 · GitHub CVSS 5.3
  7. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  8. 2026-09-25 06:15 UTCEG score recompute
  9. 2026-09-25 06:15 UTCGHSA enrichmentGHSA-q4cr-q8pj-wgf3 · GitHub CVSS 5.3
  10. 2026-09-23 21:56 UTCEG score recompute
  11. 2026-09-23 21:56 UTCGHSA enrichmentGHSA-q4cr-q8pj-wgf3 · GitHub CVSS 5.3
  12. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  13. 2026-09-22 21:42 UTCEG score recompute
  14. 2026-09-22 21:42 UTCGHSA enrichmentGHSA-q4cr-q8pj-wgf3 · GitHub CVSS 5.3
  15. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  16. 2026-09-20 03:45 UTCEG score recompute
  17. 2026-09-20 03:45 UTCGHSA enrichmentGHSA-q4cr-q8pj-wgf3 · GitHub CVSS 5.3
  18. 2026-09-19 05:18 UTCEG score recompute
  19. 2026-09-19 05:17 UTCGHSA enrichmentGHSA-q4cr-q8pj-wgf3 · GitHub CVSS 5.3
  20. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  21. 2026-09-18 03:23 UTCEG score recompute
  22. 2026-09-18 03:23 UTCGHSA enrichmentGHSA-q4cr-q8pj-wgf3 · GitHub CVSS 5.3
  23. 2026-09-17 05:12 UTCEG score recompute
  24. 2026-09-17 05:12 UTCGHSA enrichmentGHSA-q4cr-q8pj-wgf3 · GitHub CVSS 5.3
  25. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  26. 2026-09-16 07:01 UTCEG score recompute
  27. 2026-09-16 07:01 UTCGHSA enrichmentGHSA-q4cr-q8pj-wgf3 · GitHub CVSS 5.3
  28. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  29. 2026-09-15 08:50 UTCEG score recompute
  30. 2026-09-15 08:50 UTCGHSA enrichmentGHSA-q4cr-q8pj-wgf3 · GitHub CVSS 5.3
  31. 2026-09-14 01:16 UTCEG score recompute
  32. 2026-09-14 01:16 UTCGHSA enrichmentGHSA-q4cr-q8pj-wgf3 · GitHub CVSS 5.3
  33. 2026-09-13 03:06 UTCEG score recompute
  34. 2026-09-13 03:06 UTCGHSA enrichmentGHSA-q4cr-q8pj-wgf3 · GitHub CVSS 5.3
  35. 2026-09-12 04:55 UTCEG score recompute
  36. 2026-09-12 04:55 UTCGHSA enrichmentGHSA-q4cr-q8pj-wgf3 · GitHub CVSS 5.3
  37. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  38. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  39. 2026-09-11 06:44 UTCEG score recompute
  40. 2026-09-11 06:44 UTCGHSA enrichmentGHSA-q4cr-q8pj-wgf3 · GitHub CVSS 5.3
  41. 2026-09-10 07:44 UTCGHSA enrichmentGHSA-q4cr-q8pj-wgf3 · GitHub CVSS 5.3
  42. 2026-09-09 08:03 UTCEG score recompute
  43. 2026-09-09 08:03 UTCGHSA enrichmentGHSA-q4cr-q8pj-wgf3 · GitHub CVSS 5.3
  44. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  45. 2026-09-07 20:56 UTCEG score recompute
  46. 2026-09-07 20:56 UTCGHSA enrichmentGHSA-q4cr-q8pj-wgf3 · GitHub CVSS 5.3
  47. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  48. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  49. 2026-09-06 09:46 UTCEG score recompute
  50. 2026-09-06 09:46 UTCGHSA enrichmentGHSA-q4cr-q8pj-wgf3 · GitHub CVSS 5.3
  51. 2026-09-05 11:36 UTCEG score recompute
  52. 2026-09-05 11:35 UTCGHSA enrichmentGHSA-q4cr-q8pj-wgf3 · GitHub CVSS 5.3
  53. 2026-09-04 12:03 UTCEG score recompute
  54. 2026-09-04 12:03 UTCGHSA enrichmentGHSA-q4cr-q8pj-wgf3 · GitHub CVSS 5.3
  55. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  56. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  57. 2026-09-01 22:58 UTCEG score recompute
  58. 2026-09-01 22:58 UTCGHSA enrichmentGHSA-q4cr-q8pj-wgf3 · GitHub CVSS 5.3
  59. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  60. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  61. 2026-09-01 00:47 UTCGHSA enrichmentGHSA-q4cr-q8pj-wgf3 · GitHub CVSS 5.3
  62. 2026-08-30 21:45 UTCEG score recompute
  63. 2026-08-30 21:45 UTCGHSA enrichmentGHSA-q4cr-q8pj-wgf3 · GitHub CVSS 5.3
  64. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  65. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  66. 2026-08-29 23:35 UTCEG score recompute
  67. 2026-08-29 23:35 UTCGHSA enrichmentGHSA-q4cr-q8pj-wgf3 · GitHub CVSS 5.3
  68. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  69. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  70. 2026-08-27 09:37 UTCEG score recompute
  71. 2026-08-27 09:37 UTCGHSA enrichmentGHSA-q4cr-q8pj-wgf3 · GitHub CVSS 5.3
  72. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  73. 2026-08-26 10:32 UTCEG score recompute
  74. 2026-08-26 10:32 UTCGHSA enrichmentGHSA-q4cr-q8pj-wgf3 · GitHub CVSS 5.3

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-62434?
CVE-2026-62434 is a medium-severity vulnerability; its CVE record was 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 made public?
CVE-2026-62434 was made public on July 28, 2026: that is the date its CVE record's CNA, Xen Project, gives for when the vulnerability was made public. The CVE record itself was published on July 28, 2026. EchelonGraph's copy of the record carries a last-modified date of July 28, 2026; the record at its source may have been updated since.
Is CVE-2026-62434 actively exploited?
CVE-2026-62434 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (29th percentile of EPSS-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?
A fix for CVE-2026-62434 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-62434 are linked in the Vendor Advisories panel on this page.

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