Vulnerability-Lookup

GHSA-XW9F-VG47-M9MF

Vulnerability from github – Published: 2026-01-31 12:30 – Updated: 2026-01-31 12:30

Details

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

net: marvell: prestera: fix NULL dereference on devlink_alloc() failure

devlink_alloc() may return NULL on allocation failure, but prestera_devlink_alloc() unconditionally calls devlink_priv() on the returned pointer.

This leads to a NULL pointer dereference if devlink allocation fails. Add a check for a NULL devlink pointer and return NULL early to avoid the crash.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-23019"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-31T12:16:05Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: marvell: prestera: fix NULL dereference on devlink_alloc() failure\n\ndevlink_alloc() may return NULL on allocation failure, but\nprestera_devlink_alloc() unconditionally calls devlink_priv() on\nthe returned pointer.\n\nThis leads to a NULL pointer dereference if devlink allocation fails.\nAdd a check for a NULL devlink pointer and return NULL early to avoid\nthe crash.",
  "id": "GHSA-xw9f-vg47-m9mf",
  "modified": "2026-01-31T12:30:12Z",
  "published": "2026-01-31T12:30:12Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23019"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/325aea74be7e192b5c947c782da23b0d19a5fda2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/326a4b7e61d01db3507f71c8bb5e85362f607064"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3950054c9512add0cc79ab7e72b6d2f9f675e25b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8a4333b2818f0d853b43e139936c20659366e4a0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/94e070cd50790317fba7787ae6006934b7edcb6f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a428e0da1248c353557970848994f35fd3f005e2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-23019 (GCVE-0-2026-23019)

Vulnerability from cvelistv5 – Published: 2026-01-31 11:39 – Updated: 2026-01-31 11:39

Title

net: marvell: prestera: fix NULL dereference on devlink_alloc() failure

Summary

In the Linux kernel, the following vulnerability has been resolved: net: marvell: prestera: fix NULL dereference on devlink_alloc() failure devlink_alloc() may return NULL on allocation failure, but prestera_devlink_alloc() unconditionally calls devlink_priv() on the returned pointer. This leads to a NULL pointer dereference if devlink allocation fails. Add a check for a NULL devlink pointer and return NULL early to avoid the crash.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/8a4333b2818f0d853…
	https://git.kernel.org/stable/c/325aea74be7e192b5…
	https://git.kernel.org/stable/c/94e070cd50790317f…
	https://git.kernel.org/stable/c/3950054c9512add0c…
	https://git.kernel.org/stable/c/326a4b7e61d01db35…
	https://git.kernel.org/stable/c/a428e0da1248c3535…

Impacted products

Vendor

Product

Version

Linux

Affected: 34dd1710f5a3c9a7dc78e1ff6de69a19d407db25 , < 8a4333b2818f0d853b43e139936c20659366e4a0 (git)
Affected: 34dd1710f5a3c9a7dc78e1ff6de69a19d407db25 , < 325aea74be7e192b5c947c782da23b0d19a5fda2 (git)
Affected: 34dd1710f5a3c9a7dc78e1ff6de69a19d407db25 , < 94e070cd50790317fba7787ae6006934b7edcb6f (git)
Affected: 34dd1710f5a3c9a7dc78e1ff6de69a19d407db25 , < 3950054c9512add0cc79ab7e72b6d2f9f675e25b (git)
Affected: 34dd1710f5a3c9a7dc78e1ff6de69a19d407db25 , < 326a4b7e61d01db3507f71c8bb5e85362f607064 (git)
Affected: 34dd1710f5a3c9a7dc78e1ff6de69a19d407db25 , < a428e0da1248c353557970848994f35fd3f005e2 (git)

Linux

Affected: 5.10
Unaffected: 0 , < 5.10 (semver)
Unaffected: 5.15.198 , ≤ 5.15.* (semver)
Unaffected: 6.1.161 , ≤ 6.1.* (semver)
Unaffected: 6.6.121 , ≤ 6.6.* (semver)
Unaffected: 6.12.66 , ≤ 6.12.* (semver)
Unaffected: 6.18.6 , ≤ 6.18.* (semver)
Unaffected: 6.19-rc5 , ≤ * (original_commit_for_fix)

Show details on NVD website

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/marvell/prestera/prestera_devlink.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "8a4333b2818f0d853b43e139936c20659366e4a0",
              "status": "affected",
              "version": "34dd1710f5a3c9a7dc78e1ff6de69a19d407db25",
              "versionType": "git"
            },
            {
              "lessThan": "325aea74be7e192b5c947c782da23b0d19a5fda2",
              "status": "affected",
              "version": "34dd1710f5a3c9a7dc78e1ff6de69a19d407db25",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "34dd1710f5a3c9a7dc78e1ff6de69a19d407db25",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "34dd1710f5a3c9a7dc78e1ff6de69a19d407db25",
              "versionType": "git"
            },
            {
              "lessThan": "326a4b7e61d01db3507f71c8bb5e85362f607064",
              "status": "affected",
              "version": "34dd1710f5a3c9a7dc78e1ff6de69a19d407db25",
              "versionType": "git"
            },
            {
              "lessThan": "a428e0da1248c353557970848994f35fd3f005e2",
              "status": "affected",
              "version": "34dd1710f5a3c9a7dc78e1ff6de69a19d407db25",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/marvell/prestera/prestera_devlink.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.10"
            },
            {
              "lessThan": "5.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.198",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.161",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.121",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.66",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19-rc5",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.198",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.161",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.66",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.6",
                  "versionStartIncluding": "5.10",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19-rc5",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: marvell: prestera: fix NULL dereference on devlink_alloc() failure\n\ndevlink_alloc() may return NULL on allocation failure, but\nprestera_devlink_alloc() unconditionally calls devlink_priv() on\nthe returned pointer.\n\nThis leads to a NULL pointer dereference if devlink allocation fails.\nAdd a check for a NULL devlink pointer and return NULL early to avoid\nthe crash."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-31T11:39:03.179Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/8a4333b2818f0d853b43e139936c20659366e4a0"
        },
        {
          "url": "https://git.kernel.org/stable/c/325aea74be7e192b5c947c782da23b0d19a5fda2"
        },
        {
          "url": "https://git.kernel.org/stable/c/94e070cd50790317fba7787ae6006934b7edcb6f"
        },
        {
          "url": "https://git.kernel.org/stable/c/3950054c9512add0cc79ab7e72b6d2f9f675e25b"
        },
        {
          "url": "https://git.kernel.org/stable/c/326a4b7e61d01db3507f71c8bb5e85362f607064"
        },
        {
          "url": "https://git.kernel.org/stable/c/a428e0da1248c353557970848994f35fd3f005e2"
        }
      ],
      "title": "net: marvell: prestera: fix NULL dereference on devlink_alloc() failure",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23019",
    "datePublished": "2026-01-31T11:39:03.179Z",
    "dateReserved": "2026-01-13T15:37:45.940Z",
    "dateUpdated": "2026-01-31T11:39:03.179Z",
    "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-XW9F-VG47-M9MF

CVE-2026-23019 (GCVE-0-2026-23019)

Tags

Sightings

Nomenclature