Vulnerability-Lookup

GHSA-JRRM-MV6F-G3M6

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:

phy: rockchip-samsung-dcphy: fix out-of-range max_register

The PHY register block is 64KB, so with a register stride of 4 the last accessible register sits at offset 0xfffc. max_register names 0x10000, one register past the end of the mapping: dumping the registers through the regmap debugfs interface reads beyond the ioremapped region and oopses on the unmapped page. The oops fires with the regmap lock held, so later PHY operations deadlock.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-89721"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-11T20:20:01Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nphy: rockchip-samsung-dcphy: fix out-of-range max_register\n\nThe PHY register block is 64KB, so with a register stride of 4 the\nlast accessible register sits at offset 0xfffc. max_register names\n0x10000, one register past the end of the mapping: dumping the\nregisters through the regmap debugfs interface reads beyond the\nioremapped region and oopses on the unmapped page. The oops fires\nwith the regmap lock held, so later PHY operations deadlock.",
  "id": "GHSA-jrrm-mv6f-g3m6",
  "modified": "2026-09-11T21:31:37Z",
  "published": "2026-09-11T21:31:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89721"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/14afe18655c0951f4f85898f761bf92264e65ccd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4486e75ba647bd8b98fc1f053101b40caceeed4b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c1a62f9dcf531d56c56da2e4435386b6d264c69f"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-89721 (GCVE-0-2026-89721)

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

Title

phy: rockchip-samsung-dcphy: fix out-of-range max_register

Summary

In the Linux kernel, the following vulnerability has been resolved: phy: rockchip-samsung-dcphy: fix out-of-range max_register The PHY register block is 64KB, so with a register stride of 4 the last accessible register sits at offset 0xfffc. max_register names 0x10000, one register past the end of the mapping: dumping the registers through the regmap debugfs interface reads beyond the ioremapped region and oopses on the unmapped page. The oops fires with the regmap lock held, so later PHY operations deadlock.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/14afe18655c0951f4…
https://git.kernel.org/stable/c/c1a62f9dcf531d56c…
https://git.kernel.org/stable/c/4486e75ba647bd8b9…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b , < 14afe18655c0951f4f85898f761bf92264e65ccd (git) Affected: b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b , < c1a62f9dcf531d56c56da2e4435386b6d264c69f (git) Affected: b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b , < 4486e75ba647bd8b98fc1f053101b40caceeed4b (git)
Linux	Linux	Affected: 6.15 Unaffected: 0 , < 6.15 (semver) Unaffected: 6.18.50 , ≤ 6.18.* (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/phy/rockchip/phy-rockchip-samsung-dcphy.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "14afe18655c0951f4f85898f761bf92264e65ccd",
              "status": "affected",
              "version": "b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b",
              "versionType": "git"
            },
            {
              "lessThan": "c1a62f9dcf531d56c56da2e4435386b6d264c69f",
              "status": "affected",
              "version": "b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b",
              "versionType": "git"
            },
            {
              "lessThan": "4486e75ba647bd8b98fc1f053101b40caceeed4b",
              "status": "affected",
              "version": "b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/phy/rockchip/phy-rockchip-samsung-dcphy.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.15"
            },
            {
              "lessThan": "6.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.50",
              "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:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.50",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.4",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nphy: rockchip-samsung-dcphy: fix out-of-range max_register\n\nThe PHY register block is 64KB, so with a register stride of 4 the\nlast accessible register sits at offset 0xfffc. max_register names\n0x10000, one register past the end of the mapping: dumping the\nregisters through the regmap debugfs interface reads beyond the\nioremapped region and oopses on the unmapped page. The oops fires\nwith the regmap lock held, so later PHY operations deadlock."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-11T19:46:33.680Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/14afe18655c0951f4f85898f761bf92264e65ccd"
        },
        {
          "url": "https://git.kernel.org/stable/c/c1a62f9dcf531d56c56da2e4435386b6d264c69f"
        },
        {
          "url": "https://git.kernel.org/stable/c/4486e75ba647bd8b98fc1f053101b40caceeed4b"
        }
      ],
      "title": "phy: rockchip-samsung-dcphy: fix out-of-range max_register",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89721",
    "datePublished": "2026-09-11T19:46:33.680Z",
    "dateReserved": "2026-09-11T19:38:34.752Z",
    "dateUpdated": "2026-09-11T19:46:33.680Z",
    "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.

Action not permitted

GHSA-JRRM-MV6F-G3M6

CVE-2026-89721 (GCVE-0-2026-89721)

Tags

Sightings

Nomenclature