{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "09c15bbbed533903e600660ea09098b3b0524f48"
            },
            {
              "fixed": "735439394dde8462f9b50566727fbe333beaadaf"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6d3789d347a7af5c4b0b2da3af47b8d9da607ab2"
            },
            {
              "fixed": "cf51bec1560f8bf115d1476f60335f9d90e110b0"
            },
            {
              "fixed": "1b9f7aafa44f5ce852c00509104d10fd9eb0f402"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.18.32"
            },
            {
              "fixed": "6.18.33"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.18.33"
            }
          ],
          "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-2026-46118.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\npseries/papr-hvpipe: Fix null ptr deref in papr_hvpipe_dev_create_handle()\n\ncommit 6d3789d347a7 (\"papr-hvpipe: convert papr_hvpipe_dev_create_handle() to FD_PREPARE()\"),\nchanged the create handle to FD_PREPARE(), but it caused kernel\nnull-ptr-deref because after call to retain_and_null_ptr(src_info),\nsrc_info is re-used for adding it to the global list.\n\nGetting the following kernel panic in papr_hvpipe_dev_create_handle()\nwhen trying to add src_info to the list.\n Kernel attempted to write user page (0) - exploit attempt? (uid: 0)\n BUG: Kernel NULL pointer dereference on write at 0x00000000\n Faulting instruction address: 0xc0000000001b44a0\n Oops: Kernel access of bad area, sig: 11 [#1]\n ...\n Call Trace:\n papr_hvpipe_dev_ioctl+0x1f4/0x48c (unreliable)\n sys_ioctl+0x528/0x1064\n system_call_exception+0x128/0x360\n system_call_vectored_common+0x15c/0x2ec\n\nNow, the error handling with FD_PREPARE's file cleanup and __free(kfree) auto\ncleanup is getting too convoluted. This is mainly because we need to\nensure only 1 user get the srcID handle. To simplify this, we allocate\nprepare the src_info in the beginning and add it to the global list\nunder a spinlock after checking that no duplicates exist.\n\nThis simplify the error handling where if the FD_ADD fails, we can\nsimply remove the src_info from the list and consume any pending msg in\nhvpipe to be cleared, after src_info became visible in the global list.",
  "id": "CVE-2026-46118",
  "modified": "2026-07-15T01:48:54.010078766Z",
  "published": "2026-05-28T09:35:33.635Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1b9f7aafa44f5ce852c00509104d10fd9eb0f402"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/735439394dde8462f9b50566727fbe333beaadaf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cf51bec1560f8bf115d1476f60335f9d90e110b0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46118.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46118"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "pseries/papr-hvpipe: Fix null ptr deref in papr_hvpipe_dev_create_handle()"
}