Vulnerability-Lookup

FKIE_CVE-2026-23001

Vulnerability from fkie_nvd - Published: 2026-01-25 15:15 - Updated: 2026-03-25 19:23

Severity ?

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: macvlan: fix possible UAF in macvlan_forward_source() Add RCU protection on (struct macvlan_source_entry)->vlan. Whenever macvlan_hash_del_source() is called, we must clear entry->vlan pointer before RCU grace period starts. This allows macvlan_forward_source() to skip over entries queued for freeing. Note that macvlan_dev are already RCU protected, as they are embedded in a standard netdev (netdev_priv(ndev)). https: //lore.kernel.org/netdev/695fb1e8.050a0220.1c677c.039f.GAE@google.com/T/#u

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/15f6faf36e162532bec5cc05eb3fc622108bf2ed	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/232afc74a6dde0fe1830988e5827921f5ec9bb3f	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/484919832e2db6ce1e8add92c469e5d459a516b5	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6dbead9c7677186f22b7981dd085a0feec1f038e	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7470a7a63dc162f07c26dbf960e41ee1e248d80e	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8133e85b8a3ec9f10d861e0002ec6037256e987e	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8518712a2ca952d6da2238c6f0a16b4ae5ea3f13	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	3.18
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19

JSON

To clipboard

{
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  "cveTags": [],
  "descriptions": [
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      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmacvlan: fix possible UAF in macvlan_forward_source()\n\nAdd RCU protection on (struct macvlan_source_entry)-\u003evlan.\n\nWhenever macvlan_hash_del_source() is called, we must clear\nentry-\u003evlan pointer before RCU grace period starts.\n\nThis allows macvlan_forward_source() to skip over\nentries queued for freeing.\n\nNote that macvlan_dev are already RCU protected, as they\nare embedded in a standard netdev (netdev_priv(ndev)).\n\nhttps: //lore.kernel.org/netdev/695fb1e8.050a0220.1c677c.039f.GAE@google.com/T/#u"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nmacvlan: soluciona posible UAF en macvlan_forward_source()\n\nA\u00f1ade protecci\u00f3n RCU en (struct macvlan_source_entry)-\u0026gt;vlan.\n\nSiempre que se llama a macvlan_hash_del_source(), debemos borrar el puntero entry-\u0026gt;vlan antes de que comience el per\u00edodo de gracia de RCU.\n\nEsto permite a macvlan_forward_source() omitir entradas en cola para ser liberadas.\n\nTenga en cuenta que macvlan_dev ya est\u00e1n protegidos por RCU, ya que est\u00e1n incrustados en un netdev est\u00e1ndar (netdev_priv(ndev)).\n\nhttps: //lore.kernel.org/netdev/695fb1e8.050a0220.1c677c.039f.GAE@google.com/T/#u"
    }
  ],
  "id": "CVE-2026-23001",
  "lastModified": "2026-03-25T19:23:11.063",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-01-25T15:15:54.970",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
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      "source": "nvd@nist.gov",
      "type": "Primary"
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  ]
}

CVE-2026-23001 (GCVE-0-2026-23001)

Vulnerability from cvelistv5 – Published: 2026-01-25 14:36 – Updated: 2026-02-09 08:36

Title

macvlan: fix possible UAF in macvlan_forward_source()

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/8133e85b8a3ec9f10…
	https://git.kernel.org/stable/c/484919832e2db6ce1…
	https://git.kernel.org/stable/c/232afc74a6dde0fe1…
	https://git.kernel.org/stable/c/15f6faf36e162532b…
	https://git.kernel.org/stable/c/8518712a2ca952d6d…
	https://git.kernel.org/stable/c/6dbead9c7677186f2…
	https://git.kernel.org/stable/c/7470a7a63dc162f07…

Impacted products

Vendor

Product

Version

Linux

Affected: 79cf79abce71eb7dbc40e2f3121048ca5405cb47 , < 8133e85b8a3ec9f10d861e0002ec6037256e987e (git)
Affected: 79cf79abce71eb7dbc40e2f3121048ca5405cb47 , < 484919832e2db6ce1e8add92c469e5d459a516b5 (git)
Affected: 79cf79abce71eb7dbc40e2f3121048ca5405cb47 , < 232afc74a6dde0fe1830988e5827921f5ec9bb3f (git)
Affected: 79cf79abce71eb7dbc40e2f3121048ca5405cb47 , < 15f6faf36e162532bec5cc05eb3fc622108bf2ed (git)
Affected: 79cf79abce71eb7dbc40e2f3121048ca5405cb47 , < 8518712a2ca952d6da2238c6f0a16b4ae5ea3f13 (git)
Affected: 79cf79abce71eb7dbc40e2f3121048ca5405cb47 , < 6dbead9c7677186f22b7981dd085a0feec1f038e (git)
Affected: 79cf79abce71eb7dbc40e2f3121048ca5405cb47 , < 7470a7a63dc162f07c26dbf960e41ee1e248d80e (git)

Linux

Affected: 3.18
Unaffected: 0 , < 3.18 (semver)
Unaffected: 5.10.249 , ≤ 5.10.* (semver)
Unaffected: 5.15.199 , ≤ 5.15.* (semver)
Unaffected: 6.1.162 , ≤ 6.1.* (semver)
Unaffected: 6.6.122 , ≤ 6.6.* (semver)
Unaffected: 6.12.67 , ≤ 6.12.* (semver)
Unaffected: 6.18.7 , ≤ 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/macvlan.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "8133e85b8a3ec9f10d861e0002ec6037256e987e",
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              "versionType": "git"
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          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/macvlan.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "3.18"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "5.10.249",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "5.15.199",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.1.162",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.122",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.67",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
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          ]
        }
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmacvlan: fix possible UAF in macvlan_forward_source()\n\nAdd RCU protection on (struct macvlan_source_entry)-\u003evlan.\n\nWhenever macvlan_hash_del_source() is called, we must clear\nentry-\u003evlan pointer before RCU grace period starts.\n\nThis allows macvlan_forward_source() to skip over\nentries queued for freeing.\n\nNote that macvlan_dev are already RCU protected, as they\nare embedded in a standard netdev (netdev_priv(ndev)).\n\nhttps: //lore.kernel.org/netdev/695fb1e8.050a0220.1c677c.039f.GAE@google.com/T/#u"
        }
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        "dateUpdated": "2026-02-09T08:36:53.776Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
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        },
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        },
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        },
        {
          "url": "https://git.kernel.org/stable/c/7470a7a63dc162f07c26dbf960e41ee1e248d80e"
        }
      ],
      "title": "macvlan: fix possible UAF in macvlan_forward_source()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23001",
    "datePublished": "2026-01-25T14:36:15.790Z",
    "dateReserved": "2026-01-13T15:37:45.938Z",
    "dateUpdated": "2026-02-09T08:36:53.776Z",
    "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

FKIE_CVE-2026-23001

CVE-2026-23001 (GCVE-0-2026-23001)

Tags

Sightings

Nomenclature