github - ghsa-89r8-fpgw-f2hq

GHSA-89R8-FPGW-F2HQ

Vulnerability from github – Published: 2024-06-19 15:30 – Updated: 2024-11-06 21:30

Details

In the Linux kernel, the following vulnerability has been resolved:

net: stmmac: dwmac-rk: fix oob read in rk_gmac_setup

KASAN reports an out-of-bounds read in rk_gmac_setup on the line:

while (ops->regs[i]) {

This happens for most platforms since the regs flexible array member is empty, so the memory after the ops structure is being read here. It seems that mostly this happens to contain zero anyway, so we get lucky and everything still works.

To avoid adding redundant data to nearly all the ops structures, add a new flag to indicate whether the regs field is valid and avoid this loop when it is not.

Severity ?

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2021-47586"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-06-19T15:15:53Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: stmmac: dwmac-rk: fix oob read in rk_gmac_setup\n\nKASAN reports an out-of-bounds read in rk_gmac_setup on the line:\n\n\twhile (ops-\u003eregs[i]) {\n\nThis happens for most platforms since the regs flexible array member is\nempty, so the memory after the ops structure is being read here.  It\nseems that mostly this happens to contain zero anyway, so we get lucky\nand everything still works.\n\nTo avoid adding redundant data to nearly all the ops structures, add a\nnew flag to indicate whether the regs field is valid and avoid this loop\nwhen it is not.",
  "id": "GHSA-89r8-fpgw-f2hq",
  "modified": "2024-11-06T21:30:54Z",
  "published": "2024-06-19T15:30:55Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47586"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0546b224cc7717cc8a2db076b0bb069a9c430794"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0b4a5d1e15ce72f69be48f38dc0401dab890ae0f"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2021-47586 (GCVE-0-2021-47586)

Vulnerability from cvelistv5 – Published: 2024-06-19 14:53 – Updated: 2025-05-04 07:14

Summary

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: dwmac-rk: fix oob read in rk_gmac_setup KASAN reports an out-of-bounds read in rk_gmac_setup on the line: while (ops->regs[i]) { This happens for most platforms since the regs flexible array member is empty, so the memory after the ops structure is being read here. It seems that mostly this happens to contain zero anyway, so we get lucky and everything still works. To avoid adding redundant data to nearly all the ops structures, add a new flag to indicate whether the regs field is valid and avoid this loop when it is not.

Severity ?

5.5 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-125 - Out-of-bounds Read

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/0b4a5d1e15ce72f69…
	https://git.kernel.org/stable/c/0546b224cc7717cc8…

Impacted products

Vendor

Product

Version

Linux

Affected: 3bb3d6b1c1957e88bfc5e77a4557f7e6ba761fe3 , < 0b4a5d1e15ce72f69be48f38dc0401dab890ae0f (git)
Affected: 3bb3d6b1c1957e88bfc5e77a4557f7e6ba761fe3 , < 0546b224cc7717cc8a2db076b0bb069a9c430794 (git)

Linux

Affected: 5.14
Unaffected: 0 , < 5.14 (semver)
Unaffected: 5.15.11 , ≤ 5.15.* (semver)
Unaffected: 5.16 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 5.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2021-47586",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-06-20T15:19:59.553139Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-125",
                "description": "CWE-125 Out-of-bounds Read",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-11-06T19:40:50.443Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T05:39:59.913Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/0b4a5d1e15ce72f69be48f38dc0401dab890ae0f"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/0546b224cc7717cc8a2db076b0bb069a9c430794"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "0b4a5d1e15ce72f69be48f38dc0401dab890ae0f",
              "status": "affected",
              "version": "3bb3d6b1c1957e88bfc5e77a4557f7e6ba761fe3",
              "versionType": "git"
            },
            {
              "lessThan": "0546b224cc7717cc8a2db076b0bb069a9c430794",
              "status": "affected",
              "version": "3bb3d6b1c1957e88bfc5e77a4557f7e6ba761fe3",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.14"
            },
            {
              "lessThan": "5.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.16",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.11",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.16",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: stmmac: dwmac-rk: fix oob read in rk_gmac_setup\n\nKASAN reports an out-of-bounds read in rk_gmac_setup on the line:\n\n\twhile (ops-\u003eregs[i]) {\n\nThis happens for most platforms since the regs flexible array member is\nempty, so the memory after the ops structure is being read here.  It\nseems that mostly this happens to contain zero anyway, so we get lucky\nand everything still works.\n\nTo avoid adding redundant data to nearly all the ops structures, add a\nnew flag to indicate whether the regs field is valid and avoid this loop\nwhen it is not."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T07:14:12.254Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0b4a5d1e15ce72f69be48f38dc0401dab890ae0f"
        },
        {
          "url": "https://git.kernel.org/stable/c/0546b224cc7717cc8a2db076b0bb069a9c430794"
        }
      ],
      "title": "net: stmmac: dwmac-rk: fix oob read in rk_gmac_setup",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47586",
    "datePublished": "2024-06-19T14:53:51.445Z",
    "dateReserved": "2024-05-24T15:11:00.731Z",
    "dateUpdated": "2025-05-04T07:14:12.254Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-89R8-FPGW-F2HQ

CVE-2021-47586 (GCVE-0-2021-47586)

Tags

Sightings

Nomenclature