{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "97a64b4577ae2bc5599dbd008a3cd9e25de9b9f5"
            },
            {
              "fixed": "d27c02eec529f78055a46a5c9e6c62684382b2d8"
            },
            {
              "fixed": "716c546e88cfe49d841658240e10cb57bc50a2cc"
            },
            {
              "fixed": "0616314b3b34f24cbb91da8c6bd8bcdc4c8592f9"
            },
            {
              "fixed": "e0c8542c3d097ed4205ded51868195d5d6ddac62"
            },
            {
              "fixed": "ff5ee507302303b15859753c3e0d67d38fd12c88"
            },
            {
              "fixed": "6c55714c931051cd7f4839c19ce0867179fd22fe"
            },
            {
              "fixed": "0a30dceb0e1f0c480d2482e6d7cebf8aebb6eb72"
            },
            {
              "fixed": "d10119968d0e1f2b669604baf2a8b5fdb72fa6b4"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.19"
            },
            {
              "fixed": "5.10.253"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.203"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.169"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.135"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.82"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.23"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.13"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31671.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm_user: fix info leak in build_report()\n\nstruct xfrm_user_report is a __u8 proto field followed by a struct\nxfrm_selector which means there is three \"empty\" bytes of padding, but\nthe padding is never zeroed before copying to userspace.  Fix that up by\nzeroing the structure before setting individual member variables.",
  "id": "CVE-2026-31671",
  "modified": "2026-07-08T05:36:48.638818651Z",
  "published": "2026-04-24T14:45:18.669Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0616314b3b34f24cbb91da8c6bd8bcdc4c8592f9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0a30dceb0e1f0c480d2482e6d7cebf8aebb6eb72"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6c55714c931051cd7f4839c19ce0867179fd22fe"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/716c546e88cfe49d841658240e10cb57bc50a2cc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d10119968d0e1f2b669604baf2a8b5fdb72fa6b4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d27c02eec529f78055a46a5c9e6c62684382b2d8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e0c8542c3d097ed4205ded51868195d5d6ddac62"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ff5ee507302303b15859753c3e0d67d38fd12c88"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31671.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31671"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "xfrm_user: fix info leak in build_report()"
}