{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "4fd3d7d9e868ffbdb0e7a67c5c8e9dfdcd846a62"
            },
            {
              "fixed": "8a89054a1ec0767aec25ed2bbac933da6ba3cf5a"
            },
            {
              "fixed": "9247d59ca15bf60a57dca08103f055d8a4340877"
            },
            {
              "fixed": "0084712e0bee204b284510cdb63182fd5a30c2b7"
            },
            {
              "fixed": "63063ba60d2dc334e34f1e3f9271d7f3f6f30307"
            },
            {
              "fixed": "445e45a2c3a078316a62d2d331a570cf34ef5079"
            },
            {
              "fixed": "4438113be604ee67a7bf4f81da6e1cca41332ce4"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.1.0"
            },
            {
              "fixed": "6.1.175"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.141"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.91"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.33"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52981.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nneigh: let neigh_xmit take skb ownership\n\nneigh_xmit always releases the skb, except when no neighbour table is\nfound. But even the first added user of neigh_xmit (mpls) relied on\nneigh_xmit to release the skb (or queue it for tx).\n\nsashiko reported:\n If neigh_xmit() is called with an uninitialized neighbor table (for\n example, NEIGH_ND_TABLE when IPv6 is disabled), it returns -EAFNOSUPPORT\n and bypasses its internal out_kfree_skb error path.  Because the return\n value of neigh_xmit() is ignored here, does this leak the SKB?\n\nAssume full ownership and remove the last code path that doesn't\nxmit or free skb.",
  "id": "CVE-2026-52981",
  "modified": "2026-08-12T03:51:17.775221922Z",
  "published": "2026-06-24T16:28:57.074Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0084712e0bee204b284510cdb63182fd5a30c2b7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4438113be604ee67a7bf4f81da6e1cca41332ce4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/445e45a2c3a078316a62d2d331a570cf34ef5079"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/63063ba60d2dc334e34f1e3f9271d7f3f6f30307"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8a89054a1ec0767aec25ed2bbac933da6ba3cf5a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9247d59ca15bf60a57dca08103f055d8a4340877"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52981.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-52981"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "neigh: let neigh_xmit take skb ownership"
}