{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "cebdb522fd3edd1fe05f7b4a74a27da7dd0f8d86"
            },
            {
              "fixed": "0479b6e9f999cc1cbad7d9f09f574fc387e605d5"
            },
            {
              "fixed": "f88f8e4485b437e0a2f96a7ff1f88aa22d925659"
            },
            {
              "fixed": "cefeed44296261173a806bef988b26bc565da4be"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.18.0"
            },
            {
              "fixed": "6.18.30"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46182.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\npseries/papr-hvpipe: Prevent kernel stack memory leak to userspace\n\nThe hdr variable is allocated on the stack and only hdr.version and\nhdr.flags are initialized explicitly. Because the struct papr_hvpipe_hdr\ncontains reserved padding bytes (reserved[3] and reserved2[40]), these\ncould leak the uninitialized bytes to userspace after copy_to_user().\n\nThis patch fixes that by initializing the whole struct to 0.",
  "id": "CVE-2026-46182",
  "modified": "2026-07-08T05:37:11.459964027Z",
  "published": "2026-05-28T09:36:35.528Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0479b6e9f999cc1cbad7d9f09f574fc387e605d5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cefeed44296261173a806bef988b26bc565da4be"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f88f8e4485b437e0a2f96a7ff1f88aa22d925659"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46182.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46182"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "pseries/papr-hvpipe: Prevent kernel stack memory leak to userspace"
}