ghsa-rhhp-94ch-9rf5
Vulnerability from github
Published
2024-11-09 12:30
Modified
2024-11-13 21:30
Severity ?
4.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

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

sock_map: fix a NULL pointer dereference in sock_map_link_update_prog()

The following race condition could trigger a NULL pointer dereference:

sock_map_link_detach(): sock_map_link_update_prog(): mutex_lock(&sockmap_mutex); ... sockmap_link->map = NULL; mutex_unlock(&sockmap_mutex); mutex_lock(&sockmap_mutex); ... sock_map_prog_link_lookup(sockmap_link->map); mutex_unlock(&sockmap_mutex);

Fix it by adding a NULL pointer check. In this specific case, it makes no sense to update a link which is being released.

Show details on source website

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{
   affected: [],
   aliases: [
      "CVE-2024-50260",
   ],
   database_specific: {
      cwe_ids: [
         "CWE-476",
      ],
      github_reviewed: false,
      github_reviewed_at: null,
      nvd_published_at: "2024-11-09T11:15:11Z",
      severity: "MODERATE",
   },
   details: "In the Linux kernel, the following vulnerability has been resolved:\n\nsock_map: fix a NULL pointer dereference in sock_map_link_update_prog()\n\nThe following race condition could trigger a NULL pointer dereference:\n\nsock_map_link_detach():\t\tsock_map_link_update_prog():\n   mutex_lock(&sockmap_mutex);\n   ...\n   sockmap_link->map = NULL;\n   mutex_unlock(&sockmap_mutex);\n   \t\t\t\t   mutex_lock(&sockmap_mutex);\n\t\t\t\t   ...\n\t\t\t\t   sock_map_prog_link_lookup(sockmap_link->map);\n\t\t\t\t   mutex_unlock(&sockmap_mutex);\n   <continue>\n\nFix it by adding a NULL pointer check. In this specific case, it makes\nno sense to update a link which is being released.",
   id: "GHSA-rhhp-94ch-9rf5",
   modified: "2024-11-13T21:30:32Z",
   published: "2024-11-09T12:30:49Z",
   references: [
      {
         type: "ADVISORY",
         url: "https://nvd.nist.gov/vuln/detail/CVE-2024-50260",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/740be3b9a6d73336f8c7d540842d0831dc7a808b",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/9afe35fdda16e09d5bd3c49a68ba8c680dd678bd",
      },
   ],
   schema_version: "1.4.0",
   severity: [
      {
         score: "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
         type: "CVSS_V3",
      },
   ],
}


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