CVE-2026-64290

MEDIUMNVD 5.55.5
EchelonGraph scoreMEDIUM confidence

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, ghsa, nvd
Trending — 3 sources updated this week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

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

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
5.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity55% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
5%
KEV
Not listed

Published

July 25, 2026

Last Modified

August 17, 2026

Advisory Details (4)

Auto-updated Aug 12, 2026
No patch confirmed yet.
generic

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
generic

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
generic

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
generic

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.

Affected Packages

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 6.12.96-1 (32 versions)6.12.101-1
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (156 versions)7.1.4-1

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 19× in last 7d / 66× 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.

  1. 2026-08-26 19:50 UTCEG score recompute
  2. 2026-08-26 19:50 UTCGHSA enrichment
  3. 2026-08-26 14:47 UTCEPSS rescore
  4. 2026-08-25 17:44 UTCEG score recompute
  5. 2026-08-25 17:44 UTCGHSA enrichment
  6. 2026-08-25 13:49 UTCEPSS rescore
  7. 2026-08-24 15:48 UTCEG score recompute
  8. 2026-08-24 15:48 UTCGHSA enrichment
  9. 2026-08-23 14:21 UTCEG score recompute
  10. 2026-08-23 14:21 UTCGHSA enrichment
  11. 2026-08-23 00:19 UTCEPSS rescore
  12. 2026-08-22 12:56 UTCEG score recompute
  13. 2026-08-22 12:56 UTCGHSA enrichment
  14. 2026-08-21 23:49 UTCEPSS rescore
  15. 2026-08-21 11:29 UTCEG score recompute
  16. 2026-08-21 11:29 UTCGHSA enrichment
  17. 2026-08-20 22:55 UTCEPSS rescore
  18. 2026-08-20 09:42 UTCEG score recompute
  19. 2026-08-20 09:42 UTCGHSA enrichment
  20. 2026-08-19 17:04 UTCEPSS rescore
  21. 2026-08-19 08:17 UTCEG score recompute
  22. 2026-08-19 08:17 UTCGHSA enrichment
  23. 2026-08-18 13:48 UTCEPSS rescore
  24. 2026-08-18 06:52 UTCEG score recompute
  25. 2026-08-18 06:51 UTCGHSA enrichment
Show 51 more
  1. 2026-08-17 13:47 UTCEPSS rescore
  2. 2026-08-17 05:21 UTCGHSA enrichment
  3. 2026-08-16 21:59 UTCEG score recompute
  4. 2026-08-16 21:59 UTCGHSA enrichment
  5. 2026-08-16 14:56 UTCEPSS rescore
  6. 2026-08-15 20:33 UTCEG score recompute
  7. 2026-08-15 20:33 UTCGHSA enrichment
  8. 2026-08-15 01:30 UTCEPSS rescore
  9. 2026-08-14 19:07 UTCEG score recompute
  10. 2026-08-14 19:07 UTCGHSA enrichment
  11. 2026-08-13 22:00 UTCEPSS rescore
  12. 2026-08-13 17:41 UTCEG score recompute
  13. 2026-08-13 17:41 UTCGHSA enrichment
  14. 2026-08-12 16:12 UTCEG score recompute 5.50
  15. 2026-08-12 16:12 UTCGHSA enrichment
  16. 2026-08-12 16:12 UTCNVD updateCVSS v3 → 5.5 · severity → MEDIUM
  17. 2026-08-12 13:51 UTCEPSS rescore
  18. 2026-08-11 00:00 UTCEPSS rescore
  19. 2026-08-09 16:19 UTCGHSA enrichment
  20. 2026-08-09 13:47 UTCEPSS rescore
  21. 2026-08-08 16:37 UTCEPSS rescore
  22. 2026-08-06 13:47 UTCEPSS rescore
  23. 2026-08-06 13:19 UTCGHSA enrichment
  24. 2026-08-05 19:17 UTCEPSS rescore
  25. 2026-08-05 19:17 UTCEPSS rescore
  26. 2026-08-04 15:10 UTCEPSS rescore
  27. 2026-08-03 10:36 UTCEPSS rescore
  28. 2026-08-03 10:26 UTCNVD update
  29. 2026-08-03 10:17 UTCGHSA enrichment
  30. 2026-08-03 10:13 UTCMITRE cvelistV5
  31. 2026-08-02 18:15 UTCGHSA enrichment
  32. 2026-08-02 02:27 UTCEPSS rescore
  33. 2026-08-01 04:16 UTCEPSS rescore
  34. 2026-07-30 16:28 UTCEPSS rescore
  35. 2026-07-30 15:15 UTCEG score recompute
  36. 2026-07-30 15:15 UTCGHSA enrichment
  37. 2026-07-30 01:30 UTCEPSS rescore
  38. 2026-07-30 01:30 UTCEPSS rescore
  39. 2026-07-29 05:55 UTCEG score recompute
  40. 2026-07-29 05:54 UTCGHSA enrichment
  41. 2026-07-28 15:37 UTCEPSS rescore
  42. 2026-07-27 14:14 UTCEPSS rescore
  43. 2026-07-26 14:54 UTCEPSS rescore
  44. 2026-07-26 14:54 UTCEPSS rescore
  45. 2026-07-26 02:53 UTCEG score recompute
  46. 2026-07-26 02:52 UTCGHSA enrichment
  47. 2026-07-25 14:18 UTCEPSS rescore
  48. 2026-07-25 14:18 UTCEPSS rescore
  49. 2026-07-25 10:39 UTCNVD update
  50. 2026-07-25 09:40 UTCEG score recompute
  51. 2026-07-25 09:21 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-64290?
CVE-2026-64290 is a medium vulnerability 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 CVE-2026-64290 disclosed?
CVE-2026-64290 was first published in the National Vulnerability Database on July 25, 2026, with the most recent update on August 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-64290 actively exploited?
CVE-2026-64290 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 94.6% of all 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?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64290, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-64290

Explore →

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