{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "94ceffb48eac7692677d8093dcde6965b70c4b35"
            },
            {
              "fixed": "3db903a71f1f4bbf30baae166a4a49f2e8aceb61"
            },
            {
              "fixed": "8ac04a28144cfa89b61be518268233742c23d88d"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.3.0"
            },
            {
              "fixed": "6.3.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53720.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Release the label when replacing existing ct entry\n\nCited commit doesn't release the label mapping when replacing existing ct\nentry which leads to following memleak report:\n\nunreferenced object 0xffff8881854cf280 (size 96):\n  comm \"kworker/u48:74\", pid 23093, jiffies 4296664564 (age 175.944s)\n  hex dump (first 32 bytes):\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n  backtrace:\n    [\u003c000000002722d368\u003e] __kmalloc+0x4b/0x1c0\n    [\u003c00000000cc44e18f\u003e] mapping_add+0x6e8/0xc90 [mlx5_core]\n    [\u003c000000003ad942a7\u003e] mlx5_get_label_mapping+0x66/0xe0 [mlx5_core]\n    [\u003c00000000266308ac\u003e] mlx5_tc_ct_entry_create_mod_hdr+0x1c4/0xf50 [mlx5_core]\n    [\u003c000000009a768b4f\u003e] mlx5_tc_ct_entry_add_rule+0x16f/0xaf0 [mlx5_core]\n    [\u003c00000000a178f3e5\u003e] mlx5_tc_ct_block_flow_offload_add+0x10cb/0x1f90 [mlx5_core]\n    [\u003c000000007b46c496\u003e] mlx5_tc_ct_block_flow_offload+0x14a/0x630 [mlx5_core]\n    [\u003c00000000a9a18ac5\u003e] nf_flow_offload_tuple+0x1a3/0x390 [nf_flow_table]\n    [\u003c00000000d0881951\u003e] flow_offload_work_handler+0x257/0xd30 [nf_flow_table]\n    [\u003c000000009e4935a4\u003e] process_one_work+0x7c2/0x13e0\n    [\u003c00000000f5cd36a7\u003e] worker_thread+0x59d/0xec0\n    [\u003c00000000baed1daf\u003e] kthread+0x28f/0x330\n    [\u003c0000000063d282a4\u003e] ret_from_fork+0x1f/0x30\n\nFix the issue by correctly releasing the label mapping.",
  "id": "CVE-2023-53720",
  "modified": "2026-04-01T23:09:16.069690489Z",
  "published": "2025-10-22T13:23:52.123Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3db903a71f1f4bbf30baae166a4a49f2e8aceb61"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8ac04a28144cfa89b61be518268233742c23d88d"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53720.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53720"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.3",
  "summary": "net/mlx5e: Release the label when replacing existing ct entry"
}