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CVE-2026-64106 (GCVE-0-2026-64106)

Vulnerability from cvelistv5 – Published: 2026-07-19 15:40 – Updated: 2026-08-05 12:39
VLAI
Title
KVM: arm64: vgic-its: Reject restored DTE with out-of-range num_eventid_bits
Summary
In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: vgic-its: Reject restored DTE with out-of-range num_eventid_bits Userspace can restore an ITS Device Table Entry whose Size field encodes more EventID bits than the virtual ITS supports. The live MAPD path rejects that state, but vgic_its_restore_dte() accepts it and stores the out-of-range value in dev->num_eventid_bits. Reject restored DTEs with num_eventid_bits > VITS_TYPER_IDBITS before allocating the device. This mirrors the MAPD check and prevents the restored state from reaching vgic_its_restore_itt(), where the unchecked value can be converted into an oversized scan_its_table() range.
Severity
9 (Critical)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 57a9a117154c93539e33161dd318e6aeb8c04efa , < 1716b7fea2ead941a0dfac06c4504a3437cdf00d (git)
Affected: 57a9a117154c93539e33161dd318e6aeb8c04efa , < dab9f93251b2c86a033de6098d0c73afddd55d4a (git)
Affected: 57a9a117154c93539e33161dd318e6aeb8c04efa , < b94538186a3eae3763b8f96dacd610920a865aa7 (git)
Affected: 57a9a117154c93539e33161dd318e6aeb8c04efa , < 0680f511926589206f81f57f76ce131d7741a316 (git)
Affected: 57a9a117154c93539e33161dd318e6aeb8c04efa , < 8bcd15b690a390241179516af1b6ae49ebfd9d95 (git)
Affected: 57a9a117154c93539e33161dd318e6aeb8c04efa , < 9ce754ed8e7ab4e3999767ce1505f85c449ccb07 (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.12
Unaffected: 0 , < 4.12 (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.142 , ≤ 6.6.* (semver)
Unaffected: 6.12.92 , ≤ 6.12.* (semver)
Unaffected: 6.18.34 , ≤ 6.18.* (semver)
Unaffected: 7.0.11 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: KVM: arm64: vgic-its: Reject restored DTE with out-of-range num_eventid_bits",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64106.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-09-10T16:47:31Z",
      "cve": "CVE-2026-64106",
      "id": "CVE-2026-64106",
      "initial_release_date": "2026-07-21T12:59:35Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "545",
      "product_status:known_not_affected": "33",
      "product_status:recommended": "442",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64106",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64106.json",
      "version": "18"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.