CVE-2023-53720 (GCVE-0-2023-53720)

Vulnerability from cvelistv5 – Published: 2025-10-22 13:23 – Updated: 2025-10-22 13:23
VLAI?
Title
net/mlx5e: Release the label when replacing existing ct entry
Summary
In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Release the label when replacing existing ct entry Cited commit doesn't release the label mapping when replacing existing ct entry which leads to following memleak report: unreferenced object 0xffff8881854cf280 (size 96): comm "kworker/u48:74", pid 23093, jiffies 4296664564 (age 175.944s) 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: [<000000002722d368>] __kmalloc+0x4b/0x1c0 [<00000000cc44e18f>] mapping_add+0x6e8/0xc90 [mlx5_core] [<000000003ad942a7>] mlx5_get_label_mapping+0x66/0xe0 [mlx5_core] [<00000000266308ac>] mlx5_tc_ct_entry_create_mod_hdr+0x1c4/0xf50 [mlx5_core] [<000000009a768b4f>] mlx5_tc_ct_entry_add_rule+0x16f/0xaf0 [mlx5_core] [<00000000a178f3e5>] mlx5_tc_ct_block_flow_offload_add+0x10cb/0x1f90 [mlx5_core] [<000000007b46c496>] mlx5_tc_ct_block_flow_offload+0x14a/0x630 [mlx5_core] [<00000000a9a18ac5>] nf_flow_offload_tuple+0x1a3/0x390 [nf_flow_table] [<00000000d0881951>] flow_offload_work_handler+0x257/0xd30 [nf_flow_table] [<000000009e4935a4>] process_one_work+0x7c2/0x13e0 [<00000000f5cd36a7>] worker_thread+0x59d/0xec0 [<00000000baed1daf>] kthread+0x28f/0x330 [<0000000063d282a4>] ret_from_fork+0x1f/0x30 Fix the issue by correctly releasing the label mapping.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 94ceffb48eac7692677d8093dcde6965b70c4b35 , < 3db903a71f1f4bbf30baae166a4a49f2e8aceb61 (git)
Affected: 94ceffb48eac7692677d8093dcde6965b70c4b35 , < 8ac04a28144cfa89b61be518268233742c23d88d (git)
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    Linux Linux Affected: 6.3
Unaffected: 0 , < 6.3 (semver)
Unaffected: 6.3.2 , ≤ 6.3.* (semver)
Unaffected: 6.4 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "lessThan": "3db903a71f1f4bbf30baae166a4a49f2e8aceb61",
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              "version": "94ceffb48eac7692677d8093dcde6965b70c4b35",
              "versionType": "git"
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              "lessThan": "8ac04a28144cfa89b61be518268233742c23d88d",
              "status": "affected",
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              "versionType": "git"
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          "vendor": "Linux",
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "lessThanOrEqual": "6.3.*",
              "status": "unaffected",
              "version": "6.3.2",
              "versionType": "semver"
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              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.4",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
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          "nodes": [
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              "cpeMatch": [
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                  "versionEndExcluding": "6.3.2",
                  "versionStartIncluding": "6.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.4",
                  "versionStartIncluding": "6.3",
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "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\u0027t 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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-10-22T13:23:52.123Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/3db903a71f1f4bbf30baae166a4a49f2e8aceb61"
        },
        {
          "url": "https://git.kernel.org/stable/c/8ac04a28144cfa89b61be518268233742c23d88d"
        }
      ],
      "title": "net/mlx5e: Release the label when replacing existing ct entry",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53720",
    "datePublished": "2025-10-22T13:23:52.123Z",
    "dateReserved": "2025-10-22T13:21:37.347Z",
    "dateUpdated": "2025-10-22T13:23:52.123Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-53720\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-10-22T14:15:46.700\",\"lastModified\":\"2025-10-22T21:12:48.953\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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\u0027t 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.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/3db903a71f1f4bbf30baae166a4a49f2e8aceb61\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8ac04a28144cfa89b61be518268233742c23d88d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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