ghsa-q2m9-j68q-x65j
Vulnerability from github
Published
2024-05-01 15:30
Modified
2024-12-23 21:30
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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.

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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's deallocation, causing use-after-frees in many places,\nfor example, in the following call chain:\n\nbudget_register\n  |-> dvb_dmxdev_init\n        |-> dvb_register_device\n  |-> dvb_dmxdev_release\n        |-> dvb_unregister_device\n              |-> dvb_remove_device\n                    |-> dvb_device_put\n                          |-> kref_put\n\nWhen calling dvb_unregister_device, dmxdev->dvbdev (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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