{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "2d7605a729062bb554f03c5983d8cfb8c0b42e9c"
            },
            {
              "fixed": "72775977e89c25c99ee84d2c5baa3f86a8ba5cb4"
            },
            {
              "fixed": "459c6f35c58cf0fd5247e55d73ddaa29571d9b7e"
            },
            {
              "fixed": "e634408d2b0cd939cfe019398a21fb47b7a8ffe3"
            },
            {
              "fixed": "2d86aeb46d5f69c704065a8c69822582787272a1"
            },
            {
              "fixed": "80df409e1a483676826a6c66e693dba6ac507751"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.143"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.94"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.36"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.13"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53247.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ethernet: mtk_eth_soc: Fix use-after-free in metadata dst teardown\n\nmtk_free_dev() calls metadata_dst_free() which frees the metadata_dst\nwith kfree() immediately, bypassing the RCU grace period.\nIn the RX path, skb_dst_set_noref() sets a non-refcounted pointer from\nthe skb to the metadata_dst. This function requires RCU read-side\nprotection and the dst must remain valid until all RCU readers complete.\nSince metadata_dst_free() calls kfree() directly, a use-after-free can\noccur if any skb still holds a noref pointer to the dst when the driver\ntears it down.\nReplace metadata_dst_free() with dst_release() which properly goes\nthrough the refcount path: when the refcount drops to zero, it schedules\nthe actual free via call_rcu_hurry(), ensuring all RCU readers have\ncompleted before the memory is freed.",
  "id": "CVE-2026-53247",
  "modified": "2026-07-09T03:51:38.726135754Z",
  "published": "2026-06-25T08:39:40.654Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2d86aeb46d5f69c704065a8c69822582787272a1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/459c6f35c58cf0fd5247e55d73ddaa29571d9b7e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/72775977e89c25c99ee84d2c5baa3f86a8ba5cb4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/80df409e1a483676826a6c66e693dba6ac507751"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e634408d2b0cd939cfe019398a21fb47b7a8ffe3"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53247.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53247"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "net: ethernet: mtk_eth_soc: Fix use-after-free in metadata dst teardown"
}