github - ghsa-52rq-cpwv-rvvm

GHSA-52RQ-CPWV-RVVM

Vulnerability from github – Published: 2025-10-15 09:30 – Updated: 2025-10-15 09:30

Details

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: 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

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{
  "affected": [],
  "aliases": [
    "CVE-2025-39979"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-10-15T08:15:35Z",
    "severity": null
  },
  "details": "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",
  "id": "GHSA-52rq-cpwv-rvvm",
  "modified": "2025-10-15T09:30:17Z",
  "published": "2025-10-15T09:30:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-39979"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3c77f6d244188c3fb11f6aec40bbfe884f1803b5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6043819e707cefb1c9e59d6e431dcfa735c4f975"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2025-39979 (GCVE-0-2025-39979)

Vulnerability from cvelistv5 – Published: 2025-10-15 07:55 – Updated: 2025-10-15 07:55

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

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/3c77f6d244188c3fb…
	https://git.kernel.org/stable/c/6043819e707cefb1c…

Impacted products

Vendor

Product

Version

Linux

Affected: b581f4266928d3b5d1bbe711e39623d9a1696091 , < 3c77f6d244188c3fb11f6aec40bbfe884f1803b5 (git)
Affected: b581f4266928d3b5d1bbe711e39623d9a1696091 , < 6043819e707cefb1c9e59d6e431dcfa735c4f975 (git)

Linux

Affected: 6.14
Unaffected: 0 , < 6.14 (semver)
Unaffected: 6.16.10 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)

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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"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
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.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-52RQ-CPWV-RVVM

CVE-2025-39979 (GCVE-0-2025-39979)

Tags

Sightings

Nomenclature