{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4"
            },
            {
              "fixed": "521385cbd50ca9474396d88462fcdfa6489685d9"
            },
            {
              "fixed": "c2779ae9a3e5a044e5ccd564681511bbbcc5fc0f"
            },
            {
              "fixed": "72a8de41c3eb4dcf22bf3b674ea38fb2f75d6f32"
            },
            {
              "fixed": "d3125c541a96fb3c0fc7210112684baf22b6c24d"
            },
            {
              "fixed": "5a1a4b049ddde41466ccac0daeec326254b133f2"
            },
            {
              "fixed": "f779a6b6cdb6e12baa0663063ac59ab2a8f20c0c"
            },
            {
              "fixed": "700c9622b23c33b5933e6dcea816492c064e4e10"
            },
            {
              "fixed": "1beb76b2053b68c491b78370794b8ff63c8f8c02"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.29"
            },
            {
              "fixed": "5.10.258"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.209"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.175"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.136"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.83"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.24"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.14"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43089.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm_user: fix info leak in build_mapping()\n\nstruct xfrm_usersa_id has a one-byte padding hole after the proto\nfield, which ends up never getting set to zero before copying out to\nuserspace.  Fix that up by zeroing out the whole structure before\nsetting individual variables.",
  "id": "CVE-2026-43089",
  "modified": "2026-07-08T05:37:31.501239032Z",
  "published": "2026-05-06T07:40:22.630Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1beb76b2053b68c491b78370794b8ff63c8f8c02"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/521385cbd50ca9474396d88462fcdfa6489685d9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5a1a4b049ddde41466ccac0daeec326254b133f2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/700c9622b23c33b5933e6dcea816492c064e4e10"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/72a8de41c3eb4dcf22bf3b674ea38fb2f75d6f32"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c2779ae9a3e5a044e5ccd564681511bbbcc5fc0f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d3125c541a96fb3c0fc7210112684baf22b6c24d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f779a6b6cdb6e12baa0663063ac59ab2a8f20c0c"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43089.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43089"
    },
    {
      "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_mapping()"
}