GHSA-76F5-923V-9JC3

Vulnerability from github – Published: 2025-09-15 15:31 – Updated: 2025-12-03 18:30
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

media: netup_unidvb: fix use-after-free at del_timer()

When Universal DVB card is detaching, netup_unidvb_dma_fini() uses del_timer() to stop dma->timeout timer. But when timer handler netup_unidvb_dma_timeout() is running, del_timer() could not stop it. As a result, the use-after-free bug could happen. The process is shown below:

(cleanup routine)          |        (timer routine)
                           | mod_timer(&dev->tx_sim_timer, ..)

netup_unidvb_finidev() | (wait a time) netup_unidvb_dma_fini() | netup_unidvb_dma_timeout() del_timer(&dma->timeout); | | ndev->pci_dev->dev //USE

Fix by changing del_timer() to del_timer_sync().

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2023-53219"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-15T15:15:48Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: netup_unidvb: fix use-after-free at del_timer()\n\nWhen Universal DVB card is detaching, netup_unidvb_dma_fini()\nuses del_timer() to stop dma-\u003etimeout timer. But when timer\nhandler netup_unidvb_dma_timeout() is running, del_timer()\ncould not stop it. As a result, the use-after-free bug could\nhappen. The process is shown below:\n\n    (cleanup routine)          |        (timer routine)\n                               | mod_timer(\u0026dev-\u003etx_sim_timer, ..)\nnetup_unidvb_finidev()         | (wait a time)\n  netup_unidvb_dma_fini()      | netup_unidvb_dma_timeout()\n    del_timer(\u0026dma-\u003etimeout);  |\n                               |   ndev-\u003epci_dev-\u003edev //USE\n\nFix by changing del_timer() to del_timer_sync().",
  "id": "GHSA-76f5-923v-9jc3",
  "modified": "2025-12-03T18:30:20Z",
  "published": "2025-09-15T15:31:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53219"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/051af3f0b7d1cd8ab7f3e2523ad8ae1af44caba3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/07821524f67bf920342bc84ae8b3dea2a315a89e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0f5bb36bf9b39a2a96e730bf4455095b50713f63"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1550bcf2983ae1220cc8ab899a39a423fa7cb523"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/90229e9ee957d4514425e4a4d82c50ab5d57ac4d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c8f9c05e1ebcc9c7bc211cc8b74d8fb86a8756fc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dd5c77814f290b353917df329f36de1472d47154"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f9982db735a8495eee14267cf193c806b957e942"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.