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CVE-2026-89728 (GCVE-0-2026-89728)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:46 – Updated: 2026-09-11 19:46
VLAI
Title
i3c: renesas: Fix out-of-bounds access for newdevs mask
Summary
In the Linux kernel, the following vulnerability has been resolved: i3c: renesas: Fix out-of-bounds access for newdevs mask When software initiates DAA (Dynamic Address Assignment), the controller reports the result via the NRSPQP (Normal Response Queue Port Register). The data length field of the response descriptor, which is accessible through the NRSPQP register, indicates the number of devices remaining after DAA. Consequently, when the bus is empty, this field contains the maximum number of devices supported by the controller (8 for the Renesas I3C controller). Adjust the condition that computes the newly discovered devices bitmask to prevent an out-of-bounds when the I3C bus is empty.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: e7218986319b4e903dfb4642dcbd1087cf16aaec , < 769f5a233efcf8587f70fb2244a202d88582c746 (git)
Affected: e7218986319b4e903dfb4642dcbd1087cf16aaec , < 50dec95c9d1f1f82819bc898ef2b60fa83fd4ccd (git)
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Linux Linux Affected: 7.0
Unaffected: 0 , < 7.0 (semver)
Unaffected: 7.2.4 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni3c: renesas: Fix out-of-bounds access for newdevs mask\n\nWhen software initiates DAA (Dynamic Address Assignment), the controller\nreports the result via the NRSPQP (Normal Response Queue Port Register).\nThe data length field of the response descriptor, which is accessible\nthrough the NRSPQP register, indicates the number of devices remaining\nafter DAA. Consequently, when the bus is empty, this field contains the\nmaximum number of devices supported by the controller (8 for the Renesas\nI3C controller).\n\nAdjust the condition that computes the newly discovered devices bitmask\nto prevent an out-of-bounds when the I3C bus is empty."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-11T19:46:39.040Z",
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        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/50dec95c9d1f1f82819bc898ef2b60fa83fd4ccd"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89728",
    "datePublished": "2026-09-11T19:46:39.040Z",
    "dateReserved": "2026-09-11T19:38:34.760Z",
    "dateUpdated": "2026-09-11T19:46:39.040Z",
    "state": "PUBLISHED"
  },
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-09-15T14:06:02+00:00",
      "cve": "CVE-2026-89728",
      "id": "CVE-2026-89728",
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      "product_status:known_affected": "2",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: i3c: renesas: Fix out-of-bounds access for newdevs mask",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89728.json",
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}



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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

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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.
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  • 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.


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