CVE-2025-68312 (GCVE-0-2025-68312)

Vulnerability from cvelistv5 – Published: 2025-12-16 15:39 – Updated: 2026-06-16 16:26
VLAI
Title
usbnet: Prevents free active kevent
Summary
In the Linux kernel, the following vulnerability has been resolved: usbnet: Prevents free active kevent The root cause of this issue are: 1. When probing the usbnet device, executing usbnet_link_change(dev, 0, 0); put the kevent work in global workqueue. However, the kevent has not yet been scheduled when the usbnet device is unregistered. Therefore, executing free_netdev() results in the "free active object (kevent)" error reported here. 2. Another factor is that when calling usbnet_disconnect()->unregister_netdev(), if the usbnet device is up, ndo_stop() is executed to cancel the kevent. However, because the device is not up, ndo_stop() is not executed. The solution to this problem is to cancel the kevent before executing free_netdev().
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-16 16:25 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7033 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 8b4588b8b00b299be16a35be67b331d8fdba03f3 , < 285d4b953f2ca03c358f986718dd89ee9bde632e (git)
Affected: 135199a2edd459d2b123144efcd7f9bcd95128e4 , < 88a38b135d69f5db9024ff6527232f1b51be8915 (git)
Affected: 635fd8953e4309b54ca6a81bed1d4a87668694f4 , < 43005002b60ef3424719ecda16d124714b45da3b (git)
Affected: a69e617e533edddf3fa3123149900f36e0a6dc74 , < 3a10619fdefd3051aeb14860e4d4335529b4e94d (git)
Affected: a69e617e533edddf3fa3123149900f36e0a6dc74 , < 9a579d6a39513069d298eee70770bbac8a148565 (git)
Affected: a69e617e533edddf3fa3123149900f36e0a6dc74 , < 2ce1de32e05445d77fc056f6ff8339cfb78a5f84 (git)
Affected: a69e617e533edddf3fa3123149900f36e0a6dc74 , < 5158fb8da162e3982940f30cd01ed77bdf42c6fc (git)
Affected: a69e617e533edddf3fa3123149900f36e0a6dc74 , < 420c84c330d1688b8c764479e5738bbdbf0a33de (git)
Affected: d2d6b530d89b0a912148018027386aa049f0a309 (git)
Affected: e2a521a7dcc463c5017b4426ca0804e151faeff7 (git)
Affected: 7f77dcbc030c2faa6d8e8a594985eeb34018409e (git)
Affected: d49bb8cf9bfaa06aa527eb30f1a52a071da2e32f (git)
Affected: db3b738ae5f726204876f4303c49cfdf4311403f (git)
Affected: 5.4.211 , < 5.4.302 (semver)
Affected: 5.10.137 , < 5.10.247 (semver)
Affected: 5.15.61 , < 5.15.197 (semver)
Affected: 4.9.326 , < 4.10 (semver)
Affected: 4.14.291 , < 4.15 (semver)
Affected: 4.19.256 , < 4.20 (semver)
Affected: 5.18.18 , < 5.19 (semver)
Affected: 5.19.2 , < 5.20 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 5.4.302 , ≤ 5.4.* (semver)
Unaffected: 5.10.247 , ≤ 5.10.* (semver)
Unaffected: 5.15.197 , ≤ 5.15.* (semver)
Unaffected: 6.1.159 , ≤ 6.1.* (semver)
Unaffected: 6.6.117 , ≤ 6.6.* (semver)
Unaffected: 6.12.58 , ≤ 6.12.* (semver)
Unaffected: 6.17.8 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusbnet: Prevents free active kevent\n\nThe root cause of this issue are:\n1. When probing the usbnet device, executing usbnet_link_change(dev, 0, 0);\nput the kevent work in global workqueue. However, the kevent has not yet\nbeen scheduled when the usbnet device is unregistered. Therefore, executing\nfree_netdev() results in the \"free active object (kevent)\" error reported\nhere.\n\n2. Another factor is that when calling usbnet_disconnect()-\u003eunregister_netdev(),\nif the usbnet device is up, ndo_stop() is executed to cancel the kevent.\nHowever, because the device is not up, ndo_stop() is not executed.\n\nThe solution to this problem is to cancel the kevent before executing\nfree_netdev()."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nusbnet: Evita liberar un kevent activo\n\nLa causa ra\u00edz de este problema son:\n1. Al sondear el dispositivo usbnet, ejecutar usbnet_link_change(dev, 0, 0); pone el trabajo del kevent en la cola de trabajo global. Sin embargo, el kevent a\u00fan no ha sido programado cuando el dispositivo usbnet es dado de baja. Por lo tanto, ejecutar free_netdev() resulta en el error \u0027free active object (kevent)\u0027 reportado aqu\u00ed.\n\n2. Otro factor es que al llamar a usbnet_disconnect() -\u003e unregister_netdev(), si el dispositivo usbnet est\u00e1 activo, se ejecuta ndo_stop() para cancelar el kevent. Sin embargo, debido a que el dispositivo no est\u00e1 activo, ndo_stop() no se ejecuta.\n\nLa soluci\u00f3n a este problema es cancelar el kevent antes de ejecutar free_netdev()."
          }
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        "id": "CVE-2025-68312",
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      "current_release_date": "2026-07-08T12:19:40+00:00",
      "cve": "CVE-2025-68312",
      "id": "CVE-2025-68312",
      "initial_release_date": "2025-12-16T00:00:00+00:00",
      "product_status:known_affected": "198",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: usbnet: Prevents free active kevent",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-68312.json",
      "version": "3"
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            "title": "CISA ADP Vulnrichment"
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}



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