{
  "cveId": "CVE-2021-47482",
  "url": "https://patchblox.com/security/cve/CVE-2021-47482",
  "summary": "CVE-2021-47482 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47482, released May 22, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  net: batman-adv: fix error handling  Syzbot repo...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  net: batman-adv: fix error handling  Syzbot reported ODEBUG warning in batadv_nc_mesh_free(). The problem was in wrong error handling in batadv_mesh_init().  Before this patch batadv_mesh_init() was calling batadv_mesh_free() in case of any batadv_*_init() calls failure. This approach may work well, when there is some kind of indicator, which can tell which parts of batadv are initialized; but there isn\u0027t any.  All written above lead to cleaning up uninitialized fields. Even if we hide ODEBUG warning by initializing bat_priv-\u003Enc.work, syzbot was able to hit GPF in batadv_nc_purge_paths(), because hash pointer in still NULL. [1]  To fix these bugs we can unwind batadv_*_init() calls one by one. It is good approach for 2 reasons: 1) It fixes bugs on error handling path 2) It improves the performance, since we won\u0027t call unneeded batadv_*_free() functions.  So, this patch makes all batadv_*_init() clean up all allocated memory before returning with an error to no call correspoing batadv_*_free() and open-codes batadv_mesh_free() with proper order to avoid touching uninitialized fields.",
  "published": "2024-05-22T09:15:10Z",
  "severity": "medium",
  "cvss": 5.3,
  "cvssVector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00739,
  "epssPercentile": 0.5481,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.15.3-1",
      "fix": "DEBIAN-CVE-2021-47482",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47482",
      "released": "2024-05-22T09:15:10Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.15.3-1",
      "fix": "DEBIAN-CVE-2021-47482",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47482",
      "released": "2024-05-22T09:15:10Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.15.3-1",
      "fix": "DEBIAN-CVE-2021-47482",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47482",
      "released": "2024-05-22T09:15:10Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}