net/mlx5e: Avoid unregistering PSP twice

{
  "id": "19d31425fdcec1cf8cc442424d193be8403bde8f9252bc2ad9cea1ec41a3b91d",
  "url": "https://osv.dev/vulnerability/CVE-2025-68779",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "net/mlx5e: Avoid unregistering PSP twice",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Avoid unregistering PSP twice PSP is unregistered twice in: _mlx5e_remove -> mlx5e_psp_unregister mlx5e_nic_cleanup -> mlx5e_psp_unregister This leads to a refcount underflow in some conditions: ------------[ cut here ]------------ refcount_t: underflow; use-after-free. WARNING: CPU: 2 PID: 1694 at lib/refcount.c:28 refcount_warn_saturate+0xd8/0xe0 [...] mlx5e_psp_unregister+0x26/0x50 [mlx5_core] mlx5e_nic_cleanup+0x26/0x90 [mlx5_core] mlx5e_remove+0xe6/0x1f0 [mlx5_core] auxiliary_bus_remove+0x18/0x30 device_release_driver_internal+0x194/0x1f0 bus_remove_device+0xc6/0x130 device_del+0x159/0x3c0 mlx5_rescan_drivers_locked+0xbc/0x2a0 [mlx5_core] [...] Do not directly remove psp from the _mlx5e_remove path, the PSP cleanup happens as part of profile cleanup.",
    "evidence": "osv:CVE-2025-68779",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.3",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2025-68779",
      "aliases": [
        "CVE-2025-68779"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "89ee2d92f66c45625ff1c173df2dbdea32568c5d"
                },
                {
                  "fixed": "e12c912f92ccea671b514caf371f28485714bb4b"
                },
                {
                  "fixed": "35e93736f69963337912594eb3951ab320b77521"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-68779.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.18.0"
                },
                {
                  "fixed": "6.18.3"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-68779.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:48.546049578Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/35e93736f69963337912594eb3951ab320b77521",
        "https://git.kernel.org/stable/c/e12c912f92ccea671b514caf371f28485714bb4b",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68779.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-68779",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68779.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-68779",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 517066,
  "published_at": "2026-01-13T15:28:54.795+00:00"
}