Vulnerability-Lookup

GHSA-X2MR-3X78-F97G

Vulnerability from github – Published: 2026-02-14 18:30 – Updated: 2026-02-14 18:30

Details

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

dpaa2-switch: prevent ZERO_SIZE_PTR dereference when num_ifs is zero

The driver allocates arrays for ports, FDBs, and filter blocks using kcalloc() with ethsw->sw_attr.num_ifs as the element count. When the device reports zero interfaces (either due to hardware configuration or firmware issues), kcalloc(0, ...) returns ZERO_SIZE_PTR (0x10) instead of NULL.

Later in dpaa2_switch_probe(), the NAPI initialization unconditionally accesses ethsw->ports[0]->netdev, which attempts to dereference ZERO_SIZE_PTR (address 0x10), resulting in a kernel panic.

Add a check to ensure num_ifs is greater than zero after retrieving device attributes. This prevents the zero-sized allocations and subsequent invalid pointer dereference.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-23206"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-02-14T17:15:58Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndpaa2-switch: prevent ZERO_SIZE_PTR dereference when num_ifs is zero\n\nThe driver allocates arrays for ports, FDBs, and filter blocks using\nkcalloc() with ethsw-\u003esw_attr.num_ifs as the element count. When the\ndevice reports zero interfaces (either due to hardware configuration\nor firmware issues), kcalloc(0, ...) returns ZERO_SIZE_PTR (0x10)\ninstead of NULL.\n\nLater in dpaa2_switch_probe(), the NAPI initialization unconditionally\naccesses ethsw-\u003eports[0]-\u003enetdev, which attempts to dereference\nZERO_SIZE_PTR (address 0x10), resulting in a kernel panic.\n\nAdd a check to ensure num_ifs is greater than zero after retrieving\ndevice attributes. This prevents the zero-sized allocations and\nsubsequent invalid pointer dereference.",
  "id": "GHSA-x2mr-3x78-f97g",
  "modified": "2026-02-14T18:30:16Z",
  "published": "2026-02-14T18:30:16Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23206"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/155eb99aff2920153bf21217ae29565fff81e6af"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2fcccca88456b592bd668db13aa1d29ed257ca2b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4acc40db06ffd0fd92683505342b00c8a7394c60"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/80165ff16051448d6f840585ebe13f2400415df3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b97415c4362f739e25ec6f71012277086fabdf6f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ed48a84a72fefb20a82dd90a7caa7807e90c6f66"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-23206 (GCVE-0-2026-23206)

Vulnerability from cvelistv5 – Published: 2026-02-14 16:27 – Updated: 2026-02-14 16:27

Title

dpaa2-switch: prevent ZERO_SIZE_PTR dereference when num_ifs is zero

Summary

In the Linux kernel, the following vulnerability has been resolved: dpaa2-switch: prevent ZERO_SIZE_PTR dereference when num_ifs is zero The driver allocates arrays for ports, FDBs, and filter blocks using kcalloc() with ethsw->sw_attr.num_ifs as the element count. When the device reports zero interfaces (either due to hardware configuration or firmware issues), kcalloc(0, ...) returns ZERO_SIZE_PTR (0x10) instead of NULL. Later in dpaa2_switch_probe(), the NAPI initialization unconditionally accesses ethsw->ports[0]->netdev, which attempts to dereference ZERO_SIZE_PTR (address 0x10), resulting in a kernel panic. Add a check to ensure num_ifs is greater than zero after retrieving device attributes. This prevents the zero-sized allocations and subsequent invalid pointer dereference.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/2fcccca88456b592b…
	https://git.kernel.org/stable/c/80165ff16051448d6…
	https://git.kernel.org/stable/c/b97415c4362f739e2…
	https://git.kernel.org/stable/c/4acc40db06ffd0fd9…
	https://git.kernel.org/stable/c/155eb99aff2920153…
	https://git.kernel.org/stable/c/ed48a84a72fefb20a…

Impacted products

Vendor

Product

Version

Linux

Affected: 0b1b71370458860579831e77485883fcf2e8fbbe , < 2fcccca88456b592bd668db13aa1d29ed257ca2b (git)
Affected: 0b1b71370458860579831e77485883fcf2e8fbbe , < 80165ff16051448d6f840585ebe13f2400415df3 (git)
Affected: 0b1b71370458860579831e77485883fcf2e8fbbe , < b97415c4362f739e25ec6f71012277086fabdf6f (git)
Affected: 0b1b71370458860579831e77485883fcf2e8fbbe , < 4acc40db06ffd0fd92683505342b00c8a7394c60 (git)
Affected: 0b1b71370458860579831e77485883fcf2e8fbbe , < 155eb99aff2920153bf21217ae29565fff81e6af (git)
Affected: 0b1b71370458860579831e77485883fcf2e8fbbe , < ed48a84a72fefb20a82dd90a7caa7807e90c6f66 (git)

Linux

Affected: 5.13
Unaffected: 0 , < 5.13 (semver)
Unaffected: 5.15.200 , ≤ 5.15.* (semver)
Unaffected: 6.1.163 , ≤ 6.1.* (semver)
Unaffected: 6.6.124 , ≤ 6.6.* (semver)
Unaffected: 6.12.70 , ≤ 6.12.* (semver)
Unaffected: 6.18.10 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2fcccca88456b592bd668db13aa1d29ed257ca2b",
              "status": "affected",
              "version": "0b1b71370458860579831e77485883fcf2e8fbbe",
              "versionType": "git"
            },
            {
              "lessThan": "80165ff16051448d6f840585ebe13f2400415df3",
              "status": "affected",
              "version": "0b1b71370458860579831e77485883fcf2e8fbbe",
              "versionType": "git"
            },
            {
              "lessThan": "b97415c4362f739e25ec6f71012277086fabdf6f",
              "status": "affected",
              "version": "0b1b71370458860579831e77485883fcf2e8fbbe",
              "versionType": "git"
            },
            {
              "lessThan": "4acc40db06ffd0fd92683505342b00c8a7394c60",
              "status": "affected",
              "version": "0b1b71370458860579831e77485883fcf2e8fbbe",
              "versionType": "git"
            },
            {
              "lessThan": "155eb99aff2920153bf21217ae29565fff81e6af",
              "status": "affected",
              "version": "0b1b71370458860579831e77485883fcf2e8fbbe",
              "versionType": "git"
            },
            {
              "lessThan": "ed48a84a72fefb20a82dd90a7caa7807e90c6f66",
              "status": "affected",
              "version": "0b1b71370458860579831e77485883fcf2e8fbbe",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.13"
            },
            {
              "lessThan": "5.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.200",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.163",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.124",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.70",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.200",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.163",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.124",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.70",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.10",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndpaa2-switch: prevent ZERO_SIZE_PTR dereference when num_ifs is zero\n\nThe driver allocates arrays for ports, FDBs, and filter blocks using\nkcalloc() with ethsw-\u003esw_attr.num_ifs as the element count. When the\ndevice reports zero interfaces (either due to hardware configuration\nor firmware issues), kcalloc(0, ...) returns ZERO_SIZE_PTR (0x10)\ninstead of NULL.\n\nLater in dpaa2_switch_probe(), the NAPI initialization unconditionally\naccesses ethsw-\u003eports[0]-\u003enetdev, which attempts to dereference\nZERO_SIZE_PTR (address 0x10), resulting in a kernel panic.\n\nAdd a check to ensure num_ifs is greater than zero after retrieving\ndevice attributes. This prevents the zero-sized allocations and\nsubsequent invalid pointer dereference."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-14T16:27:29.095Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2fcccca88456b592bd668db13aa1d29ed257ca2b"
        },
        {
          "url": "https://git.kernel.org/stable/c/80165ff16051448d6f840585ebe13f2400415df3"
        },
        {
          "url": "https://git.kernel.org/stable/c/b97415c4362f739e25ec6f71012277086fabdf6f"
        },
        {
          "url": "https://git.kernel.org/stable/c/4acc40db06ffd0fd92683505342b00c8a7394c60"
        },
        {
          "url": "https://git.kernel.org/stable/c/155eb99aff2920153bf21217ae29565fff81e6af"
        },
        {
          "url": "https://git.kernel.org/stable/c/ed48a84a72fefb20a82dd90a7caa7807e90c6f66"
        }
      ],
      "title": "dpaa2-switch: prevent ZERO_SIZE_PTR dereference when num_ifs is zero",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23206",
    "datePublished": "2026-02-14T16:27:29.095Z",
    "dateReserved": "2026-01-13T15:37:45.986Z",
    "dateUpdated": "2026-02-14T16:27:29.095Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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-X2MR-3X78-F97G

CVE-2026-23206 (GCVE-0-2026-23206)

Tags

Sightings

Nomenclature