{
  "cveId": "CVE-2026-46118",
  "url": "https://patchblox.com/security/cve/CVE-2026-46118",
  "summary": "CVE-2026-46118 is fixed in linux on 1 platform by DEBIAN-CVE-2026-46118 (version 7.0.7-1), released June 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  pseries/papr-hvpipe: Fix null ptr deref in papr_...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  pseries/papr-hvpipe: Fix null ptr deref in papr_hvpipe_dev_create_handle()  commit 6d3789d347a7 (\u0022papr-hvpipe: convert papr_hvpipe_dev_create_handle() to FD_PREPARE()\u0022), changed the create handle to FD_PREPARE(), but it caused kernel null-ptr-deref because after call to retain_and_null_ptr(src_info), src_info is re-used for adding it to the global list.  Getting the following kernel panic in papr_hvpipe_dev_create_handle() when trying to add src_info to the list.  Kernel attempted to write user page (0) - exploit attempt? (uid: 0)  BUG: Kernel NULL pointer dereference on write at 0x00000000  Faulting instruction address: 0xc0000000001b44a0  Oops: Kernel access of bad area, sig: 11 [#1]  ...  Call Trace:  papr_hvpipe_dev_ioctl\u002B0x1f4/0x48c (unreliable)  sys_ioctl\u002B0x528/0x1064  system_call_exception\u002B0x128/0x360  system_call_vectored_common\u002B0x15c/0x2ec  Now, the error handling with FD_PREPARE\u0027s file cleanup and __free(kfree) auto cleanup is getting too convoluted. This is mainly because we need to ensure only 1 user get the srcID handle. To simplify this, we allocate prepare the src_info in the beginning and add it to the global list under a spinlock after checking that no duplicates exist.  This simplify the error handling where if the FD_ADD fails, we can simply remove the src_info from the list and consume any pending msg in hvpipe to be cleared, after src_info became visible in the global list.",
  "published": "2026-05-28T10:16:27Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00121,
  "epssPercentile": 0.0191,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.0.7-1",
      "fix": "DEBIAN-CVE-2026-46118",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-46118",
      "released": "2026-06-24T14:07:24Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}