CVE-2026-64151

HIGHPre-NVD 8.48.4
EchelonGraph scoreMEDIUM confidence

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

Score 8.4 from GitHub Security Advisory (severity: HIGH) published 2026-07-19. A secondary CVSS source baseline 8.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 3 sources updated this week
8.4EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 8.4Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

iommupt: Check for missing PAGE_SIZE in the pgsize_bitmap

Sashiko pointed out that the driver could drop PAGE_SIZE from the pgsize_bitmap. That is technically allowed but nothing does it, and such an iommu_domain would not be used with the DMA API today.

Still, it is against the design and it is trivial to fix up. Lift the PT_WARN_ON to the if branch and just skip the fast path.

CVSS v3
8.4
EG Score
8.4HIGHmedium confidence
EG Risk
38
EG Risk 38/100

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)
Severity84% × 45%
The EG Score, 8.4 of 10.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from 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.
EPSS PROB
0.2%
EPSS %ILE
5th
KEV
Not listed

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

A fix is available. Apply it within your standard update timelines.

Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from 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; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” 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 19, 2026

Last Modified

August 17, 2026

Advisory Details (2)

Auto-updated Jul 20, 2026
Patch available.
Web page

iommupt: Check for missing PAGE_SIZE in the pgsize_bitmap - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8ef3f77c440005c7f04229a75976bfc078364247
Web page

iommupt: Check for missing PAGE_SIZE in the pgsize_bitmap - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/00850f41da24423587abd6124a790dd4f12bcef3

Vendor Advisories for CVE-2026-64151(1)

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

Patch Availability(8)

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (142 versions)
  • every version up to 7.0.12-1: fixed in 7.0.12-1
—

All Vendor Advisories

(8)

Data Freshness Timeline

(refreshed 12× in last 7d / 45× 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 100 of 293 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. None are among the latest 100 rows. The 193 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  2. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  3. 2026-10-13 11:45 UTCEG score recompute
  4. 2026-10-13 11:45 UTCGHSA enrichmentGHSA-953v-7jq6-jh93 · GitHub severity HIGH · GitHub CVSS 8.4
  5. 2026-10-12 15:48 UTCEG score recompute
  6. 2026-10-11 19:32 UTCEG score recompute
  7. 2026-10-11 16:48 UTCEG score recompute
  8. 2026-10-11 14:09 UTCEG score recompute
  9. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  10. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  12. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  13. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  14. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  15. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  16. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  17. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  18. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  19. 2026-10-01 07:57 UTCEG score recompute
  20. 2026-10-01 07:57 UTCVendor advisory
  21. 2026-10-01 07:57 UTCGHSA enrichmentGHSA-953v-7jq6-jh93 · GitHub severity HIGH · GitHub CVSS 8.4
  22. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  23. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  24. 2026-09-28 06:33 UTCEG score recompute
  25. 2026-09-28 06:33 UTCVendor advisory
Show 75 more
  1. 2026-09-28 06:33 UTCGHSA enrichmentGHSA-953v-7jq6-jh93 · GitHub severity HIGH · GitHub CVSS 8.4
  2. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  3. 2026-09-24 03:33 UTCEG score recompute
  4. 2026-09-24 03:33 UTCVendor advisory
  5. 2026-09-24 03:33 UTCGHSA enrichmentGHSA-953v-7jq6-jh93 · GitHub severity HIGH · GitHub CVSS 8.4
  6. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  7. 2026-09-23 01:50 UTCEG score recompute
  8. 2026-09-23 01:50 UTCVendor advisory
  9. 2026-09-23 01:50 UTCGHSA enrichmentGHSA-953v-7jq6-jh93 · GitHub severity HIGH · GitHub CVSS 8.4
  10. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  11. 2026-09-18 04:07 UTCEG score recompute
  12. 2026-09-18 04:07 UTCVendor advisory
  13. 2026-09-18 04:07 UTCGHSA enrichmentGHSA-953v-7jq6-jh93 · GitHub severity HIGH · GitHub CVSS 8.4
  14. 2026-09-17 05:16 UTCEG score recompute
  15. 2026-09-17 05:16 UTCVendor advisory
  16. 2026-09-17 05:16 UTCGHSA enrichmentGHSA-953v-7jq6-jh93 · GitHub severity HIGH · GitHub CVSS 8.4
  17. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  18. 2026-09-16 12:53 UTCEG score recompute
  19. 2026-09-16 12:53 UTCVendor advisory
  20. 2026-09-16 12:53 UTCGHSA enrichmentGHSA-953v-7jq6-jh93 · GitHub severity HIGH · GitHub CVSS 8.4
  21. 2026-09-14 06:09 UTCVendor advisory
  22. 2026-09-14 06:09 UTCGHSA enrichmentGHSA-953v-7jq6-jh93 · GitHub severity HIGH · GitHub CVSS 8.4
  23. 2026-09-13 18:37 UTCEG score recompute
  24. 2026-09-13 18:37 UTCVendor advisory
  25. 2026-09-13 18:37 UTCGHSA enrichmentGHSA-953v-7jq6-jh93 · GitHub severity HIGH · GitHub CVSS 8.4
  26. 2026-09-13 07:03 UTCVendor advisory
  27. 2026-09-13 07:03 UTCGHSA enrichmentGHSA-953v-7jq6-jh93 · GitHub severity HIGH · GitHub CVSS 8.4
  28. 2026-09-12 19:31 UTCEG score recompute
  29. 2026-09-12 19:31 UTCVendor advisory
  30. 2026-09-12 19:31 UTCGHSA enrichmentGHSA-953v-7jq6-jh93 · GitHub severity HIGH · GitHub CVSS 8.4
  31. 2026-09-12 07:11 UTCVendor advisory
  32. 2026-09-12 07:11 UTCGHSA enrichmentGHSA-953v-7jq6-jh93 · GitHub severity HIGH · GitHub CVSS 8.4
  33. 2026-09-11 18:38 UTCEG score recompute
  34. 2026-09-11 18:38 UTCVendor advisory
  35. 2026-09-11 18:38 UTCGHSA enrichmentGHSA-953v-7jq6-jh93 · GitHub severity HIGH · GitHub CVSS 8.4
  36. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  37. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  38. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  39. 2026-09-07 23:04 UTCEG score recompute
  40. 2026-09-07 23:04 UTCVendor advisory
  41. 2026-09-07 23:04 UTCGHSA enrichmentGHSA-953v-7jq6-jh93 · GitHub severity HIGH · GitHub CVSS 8.4
  42. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  43. 2026-09-06 12:01 UTCVendor advisory
  44. 2026-09-06 12:01 UTCGHSA enrichmentGHSA-953v-7jq6-jh93 · GitHub severity HIGH · GitHub CVSS 8.4
  45. 2026-09-05 21:19 UTCEG score recompute
  46. 2026-09-05 21:19 UTCVendor advisory
  47. 2026-09-05 21:19 UTCGHSA enrichmentGHSA-953v-7jq6-jh93 · GitHub severity HIGH · GitHub CVSS 8.4
  48. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  49. 2026-09-05 09:47 UTCEG score recompute
  50. 2026-09-05 09:47 UTCVendor advisory
  51. 2026-09-05 09:47 UTCGHSA enrichmentGHSA-953v-7jq6-jh93 · GitHub severity HIGH · GitHub CVSS 8.4
  52. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  53. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  54. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  55. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  56. 2026-08-31 03:17 UTCEG score recompute
  57. 2026-08-31 03:17 UTCVendor advisory
  58. 2026-08-31 03:17 UTCGHSA enrichmentGHSA-953v-7jq6-jh93 · GitHub severity HIGH · GitHub CVSS 8.4
  59. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  60. 2026-08-30 15:33 UTCVendor advisory
  61. 2026-08-30 15:33 UTCGHSA enrichmentGHSA-953v-7jq6-jh93 · GitHub severity HIGH · GitHub CVSS 8.4
  62. 2026-08-30 02:45 UTCEG score recompute
  63. 2026-08-30 02:45 UTCVendor advisory
  64. 2026-08-30 02:45 UTCGHSA enrichmentGHSA-953v-7jq6-jh93 · GitHub severity HIGH · GitHub CVSS 8.4
  65. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  66. 2026-08-27 23:19 UTCEG score recompute
  67. 2026-08-27 23:19 UTCVendor advisory
  68. 2026-08-27 23:19 UTCGHSA enrichmentGHSA-953v-7jq6-jh93 · GitHub severity HIGH · GitHub CVSS 8.4
  69. 2026-08-27 11:47 UTCVendor advisory
  70. 2026-08-27 11:47 UTCGHSA enrichmentGHSA-953v-7jq6-jh93 · GitHub severity HIGH · GitHub CVSS 8.4
  71. 2026-08-26 22:14 UTCEG score recompute
  72. 2026-08-26 22:14 UTCVendor advisory
  73. 2026-08-26 22:13 UTCGHSA enrichmentGHSA-953v-7jq6-jh93 · GitHub severity HIGH · GitHub CVSS 8.4
  74. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  75. 2026-08-26 07:23 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-64151?
CVE-2026-64151 is a high-severity vulnerability; its CVE record was published on July 19, 2026. In the Linux kernel, the following vulnerability has been resolved: iommupt: Check for missing PAGESIZE in the pgsizebitmap Sashiko pointed out that the driver could drop PAGE_SIZE from the pgsize_bitmap. That is technically allowed but nothing does it, and such an iommu_domain would not be used…
When was the CVE record for CVE-2026-64151 published?
The CVE record for CVE-2026-64151 was published on July 19, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of August 17, 2026; the record at its source may have been updated since.
Is CVE-2026-64151 actively exploited?
CVE-2026-64151 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (5th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-64151?
CVE-2026-64151 has a CVSS base score of 8.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-64151?
A fix for CVE-2026-64151 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-64151 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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