{
  "cveId": "CVE-2021-47250",
  "url": "https://patchblox.com/security/cve/CVE-2021-47250",
  "summary": "CVE-2021-47250 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47250, released May 21, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  net: ipv4: fix memory leak in netlbl_cipsov4_add...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  net: ipv4: fix memory leak in netlbl_cipsov4_add_std  Reported by syzkaller: BUG: memory leak unreferenced object 0xffff888105df7000 (size 64): comm \u0022syz-executor842\u0022, pid 360, jiffies 4294824824 (age 22.546s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [\u003C00000000e67ed558\u003E] kmalloc include/linux/slab.h:590 [inline] [\u003C00000000e67ed558\u003E] kzalloc include/linux/slab.h:720 [inline] [\u003C00000000e67ed558\u003E] netlbl_cipsov4_add_std net/netlabel/netlabel_cipso_v4.c:145 [inline] [\u003C00000000e67ed558\u003E] netlbl_cipsov4_add\u002B0x390/0x2340 net/netlabel/netlabel_cipso_v4.c:416 [\u003C0000000006040154\u003E] genl_family_rcv_msg_doit.isra.0\u002B0x20e/0x320 net/netlink/genetlink.c:739 [\u003C00000000204d7a1c\u003E] genl_family_rcv_msg net/netlink/genetlink.c:783 [inline] [\u003C00000000204d7a1c\u003E] genl_rcv_msg\u002B0x2bf/0x4f0 net/netlink/genetlink.c:800 [\u003C00000000c0d6a995\u003E] netlink_rcv_skb\u002B0x134/0x3d0 net/netlink/af_netlink.c:2504 [\u003C00000000d78b9d2c\u003E] genl_rcv\u002B0x24/0x40 net/netlink/genetlink.c:811 [\u003C000000009733081b\u003E] netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] [\u003C000000009733081b\u003E] netlink_unicast\u002B0x4a0/0x6a0 net/netlink/af_netlink.c:1340 [\u003C00000000d5fd43b8\u003E] netlink_sendmsg\u002B0x789/0xc70 net/netlink/af_netlink.c:1929 [\u003C000000000a2d1e40\u003E] sock_sendmsg_nosec net/socket.c:654 [inline] [\u003C000000000a2d1e40\u003E] sock_sendmsg\u002B0x139/0x170 net/socket.c:674 [\u003C00000000321d1969\u003E] ____sys_sendmsg\u002B0x658/0x7d0 net/socket.c:2350 [\u003C00000000964e16bc\u003E] ___sys_sendmsg\u002B0xf8/0x170 net/socket.c:2404 [\u003C000000001615e288\u003E] __sys_sendmsg\u002B0xd3/0x190 net/socket.c:2433 [\u003C000000004ee8b6a5\u003E] do_syscall_64\u002B0x37/0x90 arch/x86/entry/common.c:47 [\u003C00000000171c7cee\u003E] entry_SYSCALL_64_after_hwframe\u002B0x44/0xae  The memory of doi_def-\u003Emap.std pointing is allocated in netlbl_cipsov4_add_std, but no place has freed it. It should be freed in cipso_v4_doi_free which frees the cipso DOI resource.",
  "published": "2024-05-21T15:15:13Z",
  "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": 0.00238,
  "epssPercentile": 0.14953,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.10.46-1",
      "fix": "DEBIAN-CVE-2021-47250",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47250",
      "released": "2024-05-21T15:15:13Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.10.46-1",
      "fix": "DEBIAN-CVE-2021-47250",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47250",
      "released": "2024-05-21T15:15:13Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.10.46-1",
      "fix": "DEBIAN-CVE-2021-47250",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47250",
      "released": "2024-05-21T15:15:13Z"
    }
  ],
  "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"
  }
}