ghsa-8gmg-4fx3-v48p
Vulnerability from github
Published
2025-06-18 12:30
Modified
2025-06-18 12:30
Details

In the Linux kernel, the following vulnerability has been resolved:

openvswitch: fix memory leak at failed datapath creation

ovs_dp_cmd_new()->ovs_dp_change()->ovs_dp_set_upcall_portids() allocates array via kmalloc. If for some reason new_vport() fails during ovs_dp_cmd_new() dp->upcall_portids must be freed. Add missing kfree.

Kmemleak example: unreferenced object 0xffff88800c382500 (size 64): comm "dump_state", pid 323, jiffies 4294955418 (age 104.347s) hex dump (first 32 bytes): 5e c2 79 e4 1f 7a 38 c7 09 21 38 0c 80 88 ff ff ^.y..z8..!8..... 03 00 00 00 0a 00 00 00 14 00 00 00 28 00 00 00 ............(... backtrace: [<0000000071bebc9f>] ovs_dp_set_upcall_portids+0x38/0xa0 [<000000000187d8bd>] ovs_dp_change+0x63/0xe0 [<000000002397e446>] ovs_dp_cmd_new+0x1f0/0x380 [<00000000aa06f36e>] genl_family_rcv_msg_doit+0xea/0x150 [<000000008f583bc4>] genl_rcv_msg+0xdc/0x1e0 [<00000000fa10e377>] netlink_rcv_skb+0x50/0x100 [<000000004959cece>] genl_rcv+0x24/0x40 [<000000004699ac7f>] netlink_unicast+0x23e/0x360 [<00000000c153573e>] netlink_sendmsg+0x24e/0x4b0 [<000000006f4aa380>] sock_sendmsg+0x62/0x70 [<00000000d0068654>] _syssendmsg+0x230/0x270 [<0000000012dacf7d>] _sys_sendmsg+0x88/0xd0 [<0000000011776020>] __sys_sendmsg+0x59/0xa0 [<000000002e8f2dc1>] do_syscall_64+0x3b/0x90 [<000000003243e7cb>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

Show details on source website


{
  "affected": [],
  "aliases": [
    "CVE-2022-49959"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-06-18T11:15:23Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nopenvswitch: fix memory leak at failed datapath creation\n\novs_dp_cmd_new()-\u003eovs_dp_change()-\u003eovs_dp_set_upcall_portids()\nallocates array via kmalloc.\nIf for some reason new_vport() fails during ovs_dp_cmd_new()\ndp-\u003eupcall_portids must be freed.\nAdd missing kfree.\n\nKmemleak example:\nunreferenced object 0xffff88800c382500 (size 64):\n  comm \"dump_state\", pid 323, jiffies 4294955418 (age 104.347s)\n  hex dump (first 32 bytes):\n    5e c2 79 e4 1f 7a 38 c7 09 21 38 0c 80 88 ff ff  ^.y..z8..!8.....\n    03 00 00 00 0a 00 00 00 14 00 00 00 28 00 00 00  ............(...\n  backtrace:\n    [\u003c0000000071bebc9f\u003e] ovs_dp_set_upcall_portids+0x38/0xa0\n    [\u003c000000000187d8bd\u003e] ovs_dp_change+0x63/0xe0\n    [\u003c000000002397e446\u003e] ovs_dp_cmd_new+0x1f0/0x380\n    [\u003c00000000aa06f36e\u003e] genl_family_rcv_msg_doit+0xea/0x150\n    [\u003c000000008f583bc4\u003e] genl_rcv_msg+0xdc/0x1e0\n    [\u003c00000000fa10e377\u003e] netlink_rcv_skb+0x50/0x100\n    [\u003c000000004959cece\u003e] genl_rcv+0x24/0x40\n    [\u003c000000004699ac7f\u003e] netlink_unicast+0x23e/0x360\n    [\u003c00000000c153573e\u003e] netlink_sendmsg+0x24e/0x4b0\n    [\u003c000000006f4aa380\u003e] sock_sendmsg+0x62/0x70\n    [\u003c00000000d0068654\u003e] ____sys_sendmsg+0x230/0x270\n    [\u003c0000000012dacf7d\u003e] ___sys_sendmsg+0x88/0xd0\n    [\u003c0000000011776020\u003e] __sys_sendmsg+0x59/0xa0\n    [\u003c000000002e8f2dc1\u003e] do_syscall_64+0x3b/0x90\n    [\u003c000000003243e7cb\u003e] entry_SYSCALL_64_after_hwframe+0x63/0xcd",
  "id": "GHSA-8gmg-4fx3-v48p",
  "modified": "2025-06-18T12:30:37Z",
  "published": "2025-06-18T12:30:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49959"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a87406f4adee9c53b311d8a1ba2849c69e29a6d0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c0c1c0241917459644326a1a3102207c871ae159"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ca54b2bfaab385778e55a9fd33f6c31e7f743b48"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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