{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "b96ba312e21c9b7ac1526829b9640ddc06695c0b"
            },
            {
              "fixed": "dd66f7f6e360ee82cd905517726f8e9091265de5"
            },
            {
              "fixed": "c885d111ed9f5a0a1f3cc4e87a50db6518abaa6c"
            },
            {
              "fixed": "e9096a5a170e7ecd6467bc2e08668ec39897cda7"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.14.0"
            },
            {
              "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-2026-53363.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: iptfs: preserve shared-frag marker in iptfs_consume_frags()\n\niptfs_consume_frags() transfers paged fragments from one socket buffer\nto another but fails to propagate the SKBFL_SHARED_FRAG flag. This is\nthe same class of bug that was fixed in skb_try_coalesce() for\nCVE-2026-46300: when fragments backed by read-only page-cache pages are\nmerged, the marker indicating their shared nature must be preserved so\nthat ESP can decide correctly whether in-place encryption is safe.\n\nApply the same two-line fix used in skb_try_coalesce() to\niptfs_consume_frags().",
  "id": "CVE-2026-53363",
  "modified": "2026-08-06T03:31:05.592775065Z",
  "published": "2026-07-10T11:55:31.820Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c885d111ed9f5a0a1f3cc4e87a50db6518abaa6c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dd66f7f6e360ee82cd905517726f8e9091265de5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e9096a5a170e7ecd6467bc2e08668ec39897cda7"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53363.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53363"
    },
    {
      "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": "xfrm: iptfs: preserve shared-frag marker in iptfs_consume_frags()"
}