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GHSA-HWQR-35WW-7C42

Vulnerability from github – Published: 2026-09-11 21:31 – Updated: 2026-09-11 21:31

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-89728"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-11T20:20:03Z",
    "severity": null
  },
  "details": "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.",
  "id": "GHSA-hwqr-35ww-7c42",
  "modified": "2026-09-11T21:31:38Z",
  "published": "2026-09-11T21:31:38Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89728"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/50dec95c9d1f1f82819bc898ef2b60fa83fd4ccd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/769f5a233efcf8587f70fb2244a202d88582c746"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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

Vulnerability from cvelistv5 – Published: 2026-09-11 19:46 – Updated: 2026-09-11 19:46

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

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/769f5a233efcf8587…
https://git.kernel.org/stable/c/50dec95c9d1f1f828…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: e7218986319b4e903dfb4642dcbd1087cf16aaec , < 769f5a233efcf8587f70fb2244a202d88582c746 (git) Affected: e7218986319b4e903dfb4642dcbd1087cf16aaec , < 50dec95c9d1f1f82819bc898ef2b60fa83fd4ccd (git)
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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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/i3c/master/renesas-i3c.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "769f5a233efcf8587f70fb2244a202d88582c746",
              "status": "affected",
              "version": "e7218986319b4e903dfb4642dcbd1087cf16aaec",
              "versionType": "git"
            },
            {
              "lessThan": "50dec95c9d1f1f82819bc898ef2b60fa83fd4ccd",
              "status": "affected",
              "version": "e7218986319b4e903dfb4642dcbd1087cf16aaec",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
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          "programFiles": [
            "drivers/i3c/master/renesas-i3c.c"
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "7.0"
            },
            {
              "lessThan": "7.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "7.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "7.0",
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                }
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              "operator": "OR"
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          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "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",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/769f5a233efcf8587f70fb2244a202d88582c746"
        },
        {
          "url": "https://git.kernel.org/stable/c/50dec95c9d1f1f82819bc898ef2b60fa83fd4ccd"
        }
      ],
      "title": "i3c: renesas: Fix out-of-bounds access for newdevs mask",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "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"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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