GHSA-Q2M9-J68Q-X65J

Vulnerability from github – Published: 2024-05-01 15:30 – Updated: 2024-12-23 21:30
VLAI
Details

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

media: edia: dvbdev: fix a use-after-free

In dvb_register_device, *pdvbdev is set equal to dvbdev, which is freed in several error-handling paths. However, *pdvbdev is not set to NULL after dvbdev's deallocation, causing use-after-frees in many places, for example, in the following call chain:

budget_register |-> dvb_dmxdev_init |-> dvb_register_device |-> dvb_dmxdev_release |-> dvb_unregister_device |-> dvb_remove_device |-> dvb_device_put |-> kref_put

When calling dvb_unregister_device, dmxdev->dvbdev (i.e. *pdvbdev in dvb_register_device) could point to memory that had been freed in dvb_register_device. Thereafter, this pointer is transferred to kref_put and triggering a use-after-free.

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
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{
  "affected": [],
  "aliases": [
    "CVE-2024-27043"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-01T13:15:49Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: edia: dvbdev: fix a use-after-free\n\nIn dvb_register_device, *pdvbdev is set equal to dvbdev, which is freed\nin several error-handling paths. However, *pdvbdev is not set to NULL\nafter dvbdev\u0027s deallocation, causing use-after-frees in many places,\nfor example, in the following call chain:\n\nbudget_register\n  |-\u003e dvb_dmxdev_init\n        |-\u003e dvb_register_device\n  |-\u003e dvb_dmxdev_release\n        |-\u003e dvb_unregister_device\n              |-\u003e dvb_remove_device\n                    |-\u003e dvb_device_put\n                          |-\u003e kref_put\n\nWhen calling dvb_unregister_device, dmxdev-\u003edvbdev (i.e. *pdvbdev in\ndvb_register_device) could point to memory that had been freed in\ndvb_register_device. Thereafter, this pointer is transferred to\nkref_put and triggering a use-after-free.",
  "id": "GHSA-q2m9-j68q-x65j",
  "modified": "2024-12-23T21:30:50Z",
  "published": "2024-05-01T15:30:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-27043"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/096237039d00c839f3e3a5fe6d001bf0db45b644"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0d3fe80b6d175c220b3e252efc6c6777e700e98e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/35674111a043b0482a9bc69da8850a83f465b07d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/437a111f79a2f5b2a5f21e27fdec6f40c8768712"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/779e8db7efb22316c8581d6c229636d2f5694a62"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8c64f4cdf4e6cc5682c52523713af8c39c94e6d5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b7586e902128e4fb7bfbb661cb52e4215a65637b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d0f5c28333822f9baa5280d813124920720fd856"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f20c3270f3ed5aa6919a87e4de9bf6c05fb57086"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"
    }
  ],
  "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"
    }
  ]
}



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