Vulnerability-Lookup

CVE-2026-64290 (GCVE-0-2026-64290)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:49 – Updated: 2026-07-25 08:49

Title

iommufd: Break the loop on failure in iommufd_fault_fops_read()

Summary

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.

Severity

No CVSS data available.

Assigner

Linux

References

3 references

URL	Tags
https://git.kernel.org/stable/c/5539da127d03c1f6c…
https://git.kernel.org/stable/c/f66c16b175509642e…
https://git.kernel.org/stable/c/172fc8b19825a0f58…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 07838f7fd529c8a6de44b601d4b7057e6c8d36ed , < 5539da127d03c1f6c2e2a49fdfbe331a0ccbdea8 (git) Affected: 07838f7fd529c8a6de44b601d4b7057e6c8d36ed , < f66c16b175509642ee7082df57c9bf3deaebae1a (git) Affected: 07838f7fd529c8a6de44b601d4b7057e6c8d36ed , < 172fc8b19825a0f5884c38f2289188284e2d45ee (git)
Linux	Linux	Affected: 6.11 Unaffected: 0 , < 6.11 (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix)

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    "suse_vex": {
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      "title": "SUSE CVE CVE-2026-64290",
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}

GHSA-VX5Q-9X62-9QQG

Vulnerability from github – Published: 2026-07-25 12:31 – Updated: 2026-07-25 12:31

Details

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.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-64290"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-25T10:17:09Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\niommufd: Break the loop on failure in iommufd_fault_fops_read()\n\nOn a copy_to_user() failure inside the inner list_for_each_entry, only the\ninner loop breaks; the outer while re-fetches the just-restored fault group\nand retries the failing copy_to_user() forever, spinning the reader at 100%\nCPU with fault-\u003emutex held.\n\nCheck rc after the inner loop and break the outer while as well.",
  "id": "GHSA-vx5q-9x62-9qqg",
  "modified": "2026-07-25T12:31:29Z",
  "published": "2026-07-25T12:31:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64290"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/172fc8b19825a0f5884c38f2289188284e2d45ee"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5539da127d03c1f6c2e2a49fdfbe331a0ccbdea8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f66c16b175509642ee7082df57c9bf3deaebae1a"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2026-64290 (GCVE-0-2026-64290)

GHSA-VX5Q-9X62-9QQG

Tags

Sightings

Nomenclature