CVE-2025-39979 (GCVE-0-2025-39979)
Vulnerability from cvelistv5
Published
2025-10-15 07:55
Modified
2025-10-15 07:55
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: net/mlx5: fs, fix UAF in flow counter release Fix a kernel trace [1] caused by releasing an HWS action of a local flow counter in mlx5_cmd_hws_delete_fte(), where the HWS action refcount and mutex were not initialized and the counter struct could already be freed when deleting the rule. Fix it by adding the missing initializations and adding refcount for the local flow counter struct. [1] Kernel log: Call Trace: <TASK> dump_stack_lvl+0x34/0x48 mlx5_fs_put_hws_action.part.0.cold+0x21/0x94 [mlx5_core] mlx5_fc_put_hws_action+0x96/0xad [mlx5_core] mlx5_fs_destroy_fs_actions+0x8b/0x152 [mlx5_core] mlx5_cmd_hws_delete_fte+0x5a/0xa0 [mlx5_core] del_hw_fte+0x1ce/0x260 [mlx5_core] mlx5_del_flow_rules+0x12d/0x240 [mlx5_core] ? ttwu_queue_wakelist+0xf4/0x110 mlx5_ib_destroy_flow+0x103/0x1b0 [mlx5_ib] uverbs_free_flow+0x20/0x50 [ib_uverbs] destroy_hw_idr_uobject+0x1b/0x50 [ib_uverbs] uverbs_destroy_uobject+0x34/0x1a0 [ib_uverbs] uobj_destroy+0x3c/0x80 [ib_uverbs] ib_uverbs_run_method+0x23e/0x360 [ib_uverbs] ? uverbs_finalize_object+0x60/0x60 [ib_uverbs] ib_uverbs_cmd_verbs+0x14f/0x2c0 [ib_uverbs] ? do_tty_write+0x1a9/0x270 ? file_tty_write.constprop.0+0x98/0xc0 ? new_sync_write+0xfc/0x190 ib_uverbs_ioctl+0xd7/0x160 [ib_uverbs] __x64_sys_ioctl+0x87/0xc0 do_syscall_64+0x59/0x90
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3c77f6d244188c3fb11f6aec40bbfe884f1803b5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6043819e707cefb1c9e59d6e431dcfa735c4f975
Impacted products
Vendor Product Version
Linux Linux Version: b581f4266928d3b5d1bbe711e39623d9a1696091
Version: b581f4266928d3b5d1bbe711e39623d9a1696091
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   Linux Linux Version: 6.14
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/fs_core.c",
            "drivers/net/ethernet/mellanox/mlx5/core/fs_core.h",
            "drivers/net/ethernet/mellanox/mlx5/core/fs_counters.c",
            "drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws_pools.c",
            "include/linux/mlx5/fs.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "3c77f6d244188c3fb11f6aec40bbfe884f1803b5",
              "status": "affected",
              "version": "b581f4266928d3b5d1bbe711e39623d9a1696091",
              "versionType": "git"
            },
            {
              "lessThan": "6043819e707cefb1c9e59d6e431dcfa735c4f975",
              "status": "affected",
              "version": "b581f4266928d3b5d1bbe711e39623d9a1696091",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/fs_core.c",
            "drivers/net/ethernet/mellanox/mlx5/core/fs_core.h",
            "drivers/net/ethernet/mellanox/mlx5/core/fs_counters.c",
            "drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws_pools.c",
            "include/linux/mlx5/fs.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.14"
            },
            {
              "lessThan": "6.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.16.*",
              "status": "unaffected",
              "version": "6.16.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.17",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.16.10",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5: fs, fix UAF in flow counter release\n\nFix a kernel trace [1] caused by releasing an HWS action of a local flow\ncounter in mlx5_cmd_hws_delete_fte(), where the HWS action refcount and\nmutex were not initialized and the counter struct could already be freed\nwhen deleting the rule.\n\nFix it by adding the missing initializations and adding refcount for the\nlocal flow counter struct.\n\n[1] Kernel log:\n Call Trace:\n  \u003cTASK\u003e\n  dump_stack_lvl+0x34/0x48\n  mlx5_fs_put_hws_action.part.0.cold+0x21/0x94 [mlx5_core]\n  mlx5_fc_put_hws_action+0x96/0xad [mlx5_core]\n  mlx5_fs_destroy_fs_actions+0x8b/0x152 [mlx5_core]\n  mlx5_cmd_hws_delete_fte+0x5a/0xa0 [mlx5_core]\n  del_hw_fte+0x1ce/0x260 [mlx5_core]\n  mlx5_del_flow_rules+0x12d/0x240 [mlx5_core]\n  ? ttwu_queue_wakelist+0xf4/0x110\n  mlx5_ib_destroy_flow+0x103/0x1b0 [mlx5_ib]\n  uverbs_free_flow+0x20/0x50 [ib_uverbs]\n  destroy_hw_idr_uobject+0x1b/0x50 [ib_uverbs]\n  uverbs_destroy_uobject+0x34/0x1a0 [ib_uverbs]\n  uobj_destroy+0x3c/0x80 [ib_uverbs]\n  ib_uverbs_run_method+0x23e/0x360 [ib_uverbs]\n  ? uverbs_finalize_object+0x60/0x60 [ib_uverbs]\n  ib_uverbs_cmd_verbs+0x14f/0x2c0 [ib_uverbs]\n  ? do_tty_write+0x1a9/0x270\n  ? file_tty_write.constprop.0+0x98/0xc0\n  ? new_sync_write+0xfc/0x190\n  ib_uverbs_ioctl+0xd7/0x160 [ib_uverbs]\n  __x64_sys_ioctl+0x87/0xc0\n  do_syscall_64+0x59/0x90"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-10-15T07:55:59.609Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/3c77f6d244188c3fb11f6aec40bbfe884f1803b5"
        },
        {
          "url": "https://git.kernel.org/stable/c/6043819e707cefb1c9e59d6e431dcfa735c4f975"
        }
      ],
      "title": "net/mlx5: fs, fix UAF in flow counter release",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-39979",
    "datePublished": "2025-10-15T07:55:59.609Z",
    "dateReserved": "2025-04-16T07:20:57.150Z",
    "dateUpdated": "2025-10-15T07:55:59.609Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-39979\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-10-15T08:15:35.767\",\"lastModified\":\"2025-10-16T15:29:11.563\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet/mlx5: fs, fix UAF in flow counter release\\n\\nFix a kernel trace [1] caused by releasing an HWS action of a local flow\\ncounter in mlx5_cmd_hws_delete_fte(), where the HWS action refcount and\\nmutex were not initialized and the counter struct could already be freed\\nwhen deleting the rule.\\n\\nFix it by adding the missing initializations and adding refcount for the\\nlocal flow counter struct.\\n\\n[1] Kernel log:\\n Call Trace:\\n  \u003cTASK\u003e\\n  dump_stack_lvl+0x34/0x48\\n  mlx5_fs_put_hws_action.part.0.cold+0x21/0x94 [mlx5_core]\\n  mlx5_fc_put_hws_action+0x96/0xad [mlx5_core]\\n  mlx5_fs_destroy_fs_actions+0x8b/0x152 [mlx5_core]\\n  mlx5_cmd_hws_delete_fte+0x5a/0xa0 [mlx5_core]\\n  del_hw_fte+0x1ce/0x260 [mlx5_core]\\n  mlx5_del_flow_rules+0x12d/0x240 [mlx5_core]\\n  ? ttwu_queue_wakelist+0xf4/0x110\\n  mlx5_ib_destroy_flow+0x103/0x1b0 [mlx5_ib]\\n  uverbs_free_flow+0x20/0x50 [ib_uverbs]\\n  destroy_hw_idr_uobject+0x1b/0x50 [ib_uverbs]\\n  uverbs_destroy_uobject+0x34/0x1a0 [ib_uverbs]\\n  uobj_destroy+0x3c/0x80 [ib_uverbs]\\n  ib_uverbs_run_method+0x23e/0x360 [ib_uverbs]\\n  ? uverbs_finalize_object+0x60/0x60 [ib_uverbs]\\n  ib_uverbs_cmd_verbs+0x14f/0x2c0 [ib_uverbs]\\n  ? do_tty_write+0x1a9/0x270\\n  ? file_tty_write.constprop.0+0x98/0xc0\\n  ? new_sync_write+0xfc/0x190\\n  ib_uverbs_ioctl+0xd7/0x160 [ib_uverbs]\\n  __x64_sys_ioctl+0x87/0xc0\\n  do_syscall_64+0x59/0x90\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/3c77f6d244188c3fb11f6aec40bbfe884f1803b5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6043819e707cefb1c9e59d6e431dcfa735c4f975\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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