CVE-2026-64290

MEDIUMNVD 5.55.5
EchelonGraph scoreMEDIUM confidence

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

Score 5.5 from GitHub Security Advisory published 2026-07-25. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
5.5EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 5.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

iommufd: Break the loop on failure in iommufd_fault_fops_read()

On a copy_to_user() failure inside the inner list_for_each_entry, only the inner loop breaks; the outer while re-fetches the just-restored fault group and retries the failing copy_to_user() forever, spinning the reader at 100% CPU with fault->mutex held.

Check rc after the inner loop and break the outer while as well.

CVSS v3
5.5
EG Score
5.5MEDIUMmedium confidence
EG Risk
25
EG Risk 25/100

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)
Severity55% × 45%
The EG Score, 5.5 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
4th
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 25, 2026

Last Modified

August 17, 2026

Advisory Details (4)

Auto-updated Aug 12, 2026
Patch available.
Web page

iommufd: Break the loop on failure in iommufd_fault_fops_read() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f66c16b175509642ee7082df57c9bf3deaebae1a
Web page

iommufd: Break the loop on failure in iommufd_fault_fops_read() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a38e0714affc5c0bbb40cba5a65d6d32a5e72a71
Web page

iommufd: Break the loop on failure in iommufd_fault_fops_read() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5539da127d03c1f6c2e2a49fdfbe331a0ccbdea8
Web page

iommufd: Break the loop on failure in iommufd_fault_fops_read() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/172fc8b19825a0f5884c38f2289188284e2d45ee

Vendor Advisories for CVE-2026-64290(1)

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

Patch Availability(11)

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

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux-6.126.12.100-1~deb12u1
  • every version up to 6.12.101-1~deb12u1: fixed in 6.12.101-1~deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 6.12.96-1 (32 versions)
  • every version up to 6.12.101-1: fixed in 6.12.101-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (159 versions)
  • every version up to 7.1.4-1: fixed in 7.1.4-1
—

Weakness Classification(1)

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

All Vendor Advisories

(11)

Data Freshness Timeline

(refreshed 9× in last 7d / 60× 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 172 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 72 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-11 19:32 UTCEG score recompute
  2. 2026-10-11 16:48 UTCEG score recompute
  3. 2026-10-11 14:09 UTCEG score recompute
  4. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  5. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  6. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  7. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  8. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  9. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  10. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  11. 2026-10-04 07:39 UTCEG score recompute
  12. 2026-10-04 07:39 UTCVendor advisory
  13. 2026-10-04 07:39 UTCGHSA enrichmentGHSA-vx5q-9x62-9qqg · GitHub CVSS 5.5
  14. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  15. 2026-10-02 19:38 UTCEG score recompute
  16. 2026-10-02 19:38 UTCVendor advisory
  17. 2026-10-02 19:38 UTCGHSA enrichmentGHSA-vx5q-9x62-9qqg · GitHub CVSS 5.5
  18. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  19. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  20. 2026-10-01 04:28 UTCEG score recompute
  21. 2026-10-01 04:28 UTCVendor advisory
  22. 2026-10-01 04:27 UTCGHSA enrichmentGHSA-vx5q-9x62-9qqg · GitHub CVSS 5.5
  23. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  24. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  25. 2026-09-28 04:21 UTCEG score recompute
Show 75 more
  1. 2026-09-28 04:21 UTCVendor advisory
  2. 2026-09-28 04:21 UTCGHSA enrichmentGHSA-vx5q-9x62-9qqg · GitHub CVSS 5.5
  3. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  4. 2026-09-25 09:56 UTCEG score recompute
  5. 2026-09-25 09:56 UTCVendor advisory
  6. 2026-09-25 09:56 UTCGHSA enrichmentGHSA-vx5q-9x62-9qqg · GitHub CVSS 5.5
  7. 2026-09-24 00:55 UTCEG score recompute
  8. 2026-09-24 00:55 UTCVendor advisory
  9. 2026-09-24 00:55 UTCGHSA enrichmentGHSA-vx5q-9x62-9qqg · GitHub CVSS 5.5
  10. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  11. 2026-09-22 22:07 UTCEG score recompute
  12. 2026-09-22 22:07 UTCVendor advisory
  13. 2026-09-22 22:06 UTCGHSA enrichmentGHSA-vx5q-9x62-9qqg · GitHub CVSS 5.5
  14. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  15. 2026-09-20 01:35 UTCEG score recompute
  16. 2026-09-20 01:35 UTCVendor advisory
  17. 2026-09-20 01:35 UTCGHSA enrichmentGHSA-vx5q-9x62-9qqg · GitHub CVSS 5.5
  18. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  19. 2026-09-18 02:51 UTCEG score recompute
  20. 2026-09-18 02:51 UTCVendor advisory
  21. 2026-09-18 02:51 UTCGHSA enrichmentGHSA-vx5q-9x62-9qqg · GitHub CVSS 5.5
  22. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  23. 2026-09-16 11:57 UTCEG score recompute
  24. 2026-09-16 11:57 UTCVendor advisory
  25. 2026-09-16 11:57 UTCGHSA enrichmentGHSA-vx5q-9x62-9qqg · GitHub CVSS 5.5
  26. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  27. 2026-09-15 09:31 UTCEG score recompute
  28. 2026-09-15 09:31 UTCVendor advisory
  29. 2026-09-15 09:31 UTCGHSA enrichmentGHSA-vx5q-9x62-9qqg · GitHub CVSS 5.5
  30. 2026-09-13 21:39 UTCEG score recompute
  31. 2026-09-13 21:39 UTCVendor advisory
  32. 2026-09-13 21:39 UTCGHSA enrichmentGHSA-vx5q-9x62-9qqg · GitHub CVSS 5.5
  33. 2026-09-12 17:55 UTCEG score recompute
  34. 2026-09-12 17:55 UTCVendor advisory
  35. 2026-09-12 17:55 UTCGHSA enrichmentGHSA-vx5q-9x62-9qqg · GitHub CVSS 5.5
  36. 2026-09-11 16:29 UTCEG score recompute
  37. 2026-09-11 16:29 UTCVendor advisory
  38. 2026-09-11 16:29 UTCGHSA enrichmentGHSA-vx5q-9x62-9qqg · GitHub CVSS 5.5
  39. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  40. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  41. 2026-09-10 13:30 UTCEG score recompute
  42. 2026-09-10 13:30 UTCVendor advisory
  43. 2026-09-10 13:30 UTCGHSA enrichmentGHSA-vx5q-9x62-9qqg · GitHub CVSS 5.5
  44. 2026-09-09 08:40 UTCEG score recompute
  45. 2026-09-09 08:40 UTCVendor advisory
  46. 2026-09-09 08:40 UTCGHSA enrichmentGHSA-vx5q-9x62-9qqg · GitHub CVSS 5.5
  47. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  48. 2026-09-07 21:21 UTCEG score recompute
  49. 2026-09-07 21:21 UTCGHSA enrichmentGHSA-vx5q-9x62-9qqg · GitHub CVSS 5.5
  50. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  51. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  52. 2026-09-05 19:21 UTCEG score recompute
  53. 2026-09-05 19:21 UTCGHSA enrichmentGHSA-vx5q-9x62-9qqg · GitHub CVSS 5.5
  54. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  55. 2026-09-04 12:42 UTCEG score recompute
  56. 2026-09-04 12:42 UTCGHSA enrichmentGHSA-vx5q-9x62-9qqg · GitHub CVSS 5.5
  57. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  58. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  59. 2026-09-01 23:14 UTCEG score recompute
  60. 2026-09-01 23:14 UTCGHSA enrichmentGHSA-vx5q-9x62-9qqg · GitHub CVSS 5.5
  61. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  62. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  63. 2026-08-31 01:38 UTCEG score recompute
  64. 2026-08-31 01:38 UTCGHSA enrichmentGHSA-vx5q-9x62-9qqg · GitHub CVSS 5.5
  65. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  66. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  67. 2026-08-30 00:11 UTCEG score recompute
  68. 2026-08-30 00:11 UTCGHSA enrichmentGHSA-vx5q-9x62-9qqg · GitHub CVSS 5.5
  69. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  70. 2026-08-27 21:16 UTCEG score recompute
  71. 2026-08-27 21:16 UTCGHSA enrichmentGHSA-vx5q-9x62-9qqg · GitHub CVSS 5.5
  72. 2026-08-26 19:50 UTCEG score recompute
  73. 2026-08-26 19:50 UTCGHSA enrichmentGHSA-vx5q-9x62-9qqg · GitHub CVSS 5.5
  74. 2026-08-26 14:47 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  75. 2026-08-25 17:44 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-64290?
CVE-2026-64290 is a medium-severity vulnerability; its CVE record was published on July 25, 2026. In the Linux kernel, the following vulnerability has been resolved: iommufd: Break the loop on failure in iommufdfaultfops_read() On a copytouser() failure inside the inner listforeach_entry, only the inner loop breaks; the outer while re-fetches the just-restored fault group and retries the…
When was the CVE record for CVE-2026-64290 published?
The CVE record for CVE-2026-64290 was published on July 25, 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-2026-64290 actively exploited?
CVE-2026-64290 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (4th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-64290?
CVE-2026-64290 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-64290?
A fix for CVE-2026-64290 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-64290 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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