CVE-2026-64217

HIGHPre-NVD 7.87.8
EchelonGraph scoreMEDIUM confidence

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

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-24. A secondary CVSS source baseline 7.8; 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
7.8EG
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: 0.1%CVSS: 7.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

netfs: Fix overrun check in netfs_extract_user_iter()

Fix netfs_extract_user_iter() so that if iov_iter_extract_pages() overfills pages[], then those pages don't get included in the iterator constructed at the end of the function. If there was an overfill, memory corruption has already happened.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100

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)
Severity78% × 45%
The EG Score, 7.8 of 10.
Exploitation0.1% × 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
0.1%
EPSS %ILE
2nd
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 24, 2026

Last Modified

August 11, 2026

Advisory Details (5)

Auto-updated Jul 27, 2026
Patch available.
Web page

netfs: Fix overrun check in netfs_extract_user_iter() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f48b9157f0f611fa436c360648603d5ded719b12
Web page

netfs: Fix overrun check in netfs_extract_user_iter() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/afeb32d9bf9aaeea51d0f723a19f14afb73bd94d
Web page

netfs: Fix overrun check in netfs_extract_user_iter() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/96cc3beb2390ba9f9c128c5733c0ccfe450dd4f9
Web page

netfs: Fix overrun check in netfs_extract_user_iter() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0ef37eef83fad3542ee06db2940433ae1a92b39d
Web page

netfs: Fix overrun check in netfs_extract_user_iter() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/00efe58bbdcc93272d579ca24bfc912563f4a204

Vendor Advisories for CVE-2026-64217(1)

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

Patch Availability(17)

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

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.38-1 ... 6.12.94-1~bpo12+1 (27 versions)
  • every version up to 6.12.94-1: fixed in 6.12.94-1
—
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
—

Weakness Classification(1)

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

All Vendor Advisories

(17)

Data Freshness Timeline

(refreshed 13× in last 7d / 72× 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 322 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 222 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 0.1% · 2nd percentile
  2. 2026-10-13 11:44 UTCEG score recompute
  3. 2026-10-13 11:44 UTCGHSA enrichmentGHSA-782q-hrc8-fp6w · GitHub severity HIGH · GitHub CVSS 7.8
  4. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  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 0.1% · 2nd percentile
  10. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  12. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  13. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  14. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  15. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  16. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  17. 2026-10-04 07:46 UTCEG score recompute
  18. 2026-10-04 07:46 UTCVendor advisory
  19. 2026-10-04 07:46 UTCGHSA enrichmentGHSA-782q-hrc8-fp6w · GitHub severity HIGH · GitHub CVSS 7.8
  20. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  21. 2026-10-03 03:20 UTCEG score recompute
  22. 2026-10-03 03:20 UTCVendor advisory
  23. 2026-10-03 03:20 UTCGHSA enrichmentGHSA-782q-hrc8-fp6w · GitHub severity HIGH · GitHub CVSS 7.8
  24. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  25. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
Show 75 more
  1. 2026-10-01 06:03 UTCEG score recompute
  2. 2026-10-01 06:03 UTCVendor advisory
  3. 2026-10-01 06:03 UTCGHSA enrichmentGHSA-782q-hrc8-fp6w · GitHub severity HIGH · GitHub CVSS 7.8
  4. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  5. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  6. 2026-09-28 04:31 UTCEG score recompute
  7. 2026-09-28 04:31 UTCVendor advisory
  8. 2026-09-28 04:30 UTCGHSA enrichmentGHSA-782q-hrc8-fp6w · GitHub severity HIGH · GitHub CVSS 7.8
  9. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  10. 2026-09-25 10:13 UTCEG score recompute
  11. 2026-09-25 10:13 UTCVendor advisory
  12. 2026-09-25 10:13 UTCGHSA enrichmentGHSA-782q-hrc8-fp6w · GitHub severity HIGH · GitHub CVSS 7.8
  13. 2026-09-24 10:02 UTCVendor advisory
  14. 2026-09-24 10:02 UTCGHSA enrichmentGHSA-782q-hrc8-fp6w · GitHub severity HIGH · GitHub CVSS 7.8
  15. 2026-09-23 22:18 UTCEG score recompute
  16. 2026-09-23 22:18 UTCVendor advisory
  17. 2026-09-23 22:18 UTCGHSA enrichmentGHSA-782q-hrc8-fp6w · GitHub severity HIGH · GitHub CVSS 7.8
  18. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  19. 2026-09-23 10:02 UTCVendor advisory
  20. 2026-09-23 10:02 UTCGHSA enrichmentGHSA-782q-hrc8-fp6w · GitHub severity HIGH · GitHub CVSS 7.8
  21. 2026-09-22 22:18 UTCEG score recompute
  22. 2026-09-22 22:18 UTCVendor advisory
  23. 2026-09-22 22:17 UTCGHSA enrichmentGHSA-782q-hrc8-fp6w · GitHub severity HIGH · GitHub CVSS 7.8
  24. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  25. 2026-09-20 01:42 UTCEG score recompute
  26. 2026-09-20 01:42 UTCVendor advisory
  27. 2026-09-20 01:42 UTCGHSA enrichmentGHSA-782q-hrc8-fp6w · GitHub severity HIGH · GitHub CVSS 7.8
  28. 2026-09-18 22:29 UTCEG score recompute
  29. 2026-09-18 22:29 UTCVendor advisory
  30. 2026-09-18 22:28 UTCGHSA enrichmentGHSA-782q-hrc8-fp6w · GitHub severity HIGH · GitHub CVSS 7.8
  31. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  32. 2026-09-18 03:01 UTCEG score recompute
  33. 2026-09-18 03:01 UTCVendor advisory
  34. 2026-09-18 03:01 UTCGHSA enrichmentGHSA-782q-hrc8-fp6w · GitHub severity HIGH · GitHub CVSS 7.8
  35. 2026-09-17 01:59 UTCEG score recompute
  36. 2026-09-17 01:59 UTCVendor advisory
  37. 2026-09-17 01:59 UTCGHSA enrichmentGHSA-782q-hrc8-fp6w · GitHub severity HIGH · GitHub CVSS 7.8
  38. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  39. 2026-09-16 06:41 UTCEG score recompute
  40. 2026-09-16 06:41 UTCVendor advisory
  41. 2026-09-16 06:40 UTCGHSA enrichmentGHSA-782q-hrc8-fp6w · GitHub severity HIGH · GitHub CVSS 7.8
  42. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  43. 2026-09-15 09:39 UTCEG score recompute
  44. 2026-09-15 09:39 UTCVendor advisory
  45. 2026-09-15 09:39 UTCGHSA enrichmentGHSA-782q-hrc8-fp6w · GitHub severity HIGH · GitHub CVSS 7.8
  46. 2026-09-14 16:08 UTCVendor advisory
  47. 2026-09-14 16:08 UTCGHSA enrichmentGHSA-782q-hrc8-fp6w · GitHub severity HIGH · GitHub CVSS 7.8
  48. 2026-09-14 04:04 UTCEG score recompute
  49. 2026-09-14 04:04 UTCVendor advisory
  50. 2026-09-14 04:04 UTCGHSA enrichmentGHSA-782q-hrc8-fp6w · GitHub severity HIGH · GitHub CVSS 7.8
  51. 2026-09-13 16:20 UTCVendor advisory
  52. 2026-09-13 16:20 UTCGHSA enrichmentGHSA-782q-hrc8-fp6w · GitHub severity HIGH · GitHub CVSS 7.8
  53. 2026-09-13 04:36 UTCVendor advisory
  54. 2026-09-13 04:36 UTCGHSA enrichmentGHSA-782q-hrc8-fp6w · GitHub severity HIGH · GitHub CVSS 7.8
  55. 2026-09-12 16:51 UTCEG score recompute
  56. 2026-09-12 16:51 UTCVendor advisory
  57. 2026-09-12 16:51 UTCGHSA enrichmentGHSA-782q-hrc8-fp6w · GitHub severity HIGH · GitHub CVSS 7.8
  58. 2026-09-12 05:06 UTCVendor advisory
  59. 2026-09-12 05:06 UTCGHSA enrichmentGHSA-782q-hrc8-fp6w · GitHub severity HIGH · GitHub CVSS 7.8
  60. 2026-09-11 16:37 UTCEG score recompute
  61. 2026-09-11 16:37 UTCVendor advisory
  62. 2026-09-11 16:37 UTCGHSA enrichmentGHSA-782q-hrc8-fp6w · GitHub severity HIGH · GitHub CVSS 7.8
  63. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  64. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  65. 2026-09-11 02:45 UTCVendor advisory
  66. 2026-09-11 02:45 UTCGHSA enrichmentGHSA-782q-hrc8-fp6w · GitHub severity HIGH · GitHub CVSS 7.8
  67. 2026-09-10 14:47 UTCEG score recompute
  68. 2026-09-10 14:47 UTCVendor advisory
  69. 2026-09-10 14:47 UTCGHSA enrichmentGHSA-782q-hrc8-fp6w · GitHub severity HIGH · GitHub CVSS 7.8
  70. 2026-09-09 08:48 UTCEG score recompute
  71. 2026-09-09 08:48 UTCVendor advisory
  72. 2026-09-09 08:48 UTCGHSA enrichmentGHSA-782q-hrc8-fp6w · GitHub severity HIGH · GitHub CVSS 7.8
  73. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  74. 2026-09-07 21:26 UTCEG score recompute
  75. 2026-09-07 21:26 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-64217?
CVE-2026-64217 is a high-severity vulnerability; its CVE record was published on July 24, 2026. In the Linux kernel, the following vulnerability has been resolved: netfs: Fix overrun check in netfsextractuser_iter() Fix netfsextractuseriter() so that if ioviterextractpages() overfills pages[], then those pages don't get included in the iterator constructed at the end of the function. If there…
When was the CVE record for CVE-2026-64217 published?
The CVE record for CVE-2026-64217 was published on July 24, 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 11, 2026; the record at its source may have been updated since.
Is CVE-2026-64217 actively exploited?
CVE-2026-64217 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (2nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-64217?
CVE-2026-64217 has a CVSS base score of 7.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-64217?
A fix for CVE-2026-64217 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-64217 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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