{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "23020f04932701d5c8363e60756f12b43b8ed752"
            },
            {
              "fixed": "f670fa4b19ceddc6d215dda4997888ccba9bbc61"
            },
            {
              "fixed": "d78c8ab7bd84952e053d0c622b7fc1b4ad8a19a3"
            },
            {
              "fixed": "bde34e84edc8b5571fbde7e941e175a4293ee1eb"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.11.0"
            },
            {
              "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/2026/63xxx/CVE-2026-63857.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: airoha: Do not read uninitialized fragment address in airoha_dev_xmit()\n\nThe transmit loop in airoha_dev_xmit() reads fragment address and length\nduring its final iteration, when the loop index equals\nskb_shinfo(skb)-\u003enr_frags, at which point the fragment data is\nuninitialized. While these values are never consumed, the read itself is\nunsafe and may trigger a page fault. Fix this by avoiding the fragment\nread on the last iteration.\nAdditionally, move the skb pointer from the first to the last used packet\ndescriptor, so that airoha_qdma_tx_napi_poll() defers freeing the skb\nuntil the final descriptor is processed.",
  "id": "CVE-2026-63857",
  "modified": "2026-07-22T05:30:02.918580729Z",
  "published": "2026-07-19T14:04:46.339Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bde34e84edc8b5571fbde7e941e175a4293ee1eb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d78c8ab7bd84952e053d0c622b7fc1b4ad8a19a3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f670fa4b19ceddc6d215dda4997888ccba9bbc61"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63857.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63857"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "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: airoha: Do not read uninitialized fragment address in airoha_dev_xmit()"
}