ghsa-mgf7-9fq3-64j5
Vulnerability from github
Published
2024-09-04 21:30
Modified
2024-09-12 12:30
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:

mptcp: pm: avoid possible UaF when selecting endp

select_local_address() and select_signal_address() both select an endpoint entry from the list inside an RCU protected section, but return a reference to it, to be read later on. If the entry is dereferenced after the RCU unlock, reading info could cause a Use-after-Free.

A simple solution is to copy the required info while inside the RCU protected section to avoid any risk of UaF later. The address ID might need to be modified later to handle the ID0 case later, so a copy seems OK to deal with.

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{
   affected: [],
   aliases: [
      "CVE-2024-44974",
   ],
   database_specific: {
      cwe_ids: [
         "CWE-416",
      ],
      github_reviewed: false,
      github_reviewed_at: null,
      nvd_published_at: "2024-09-04T20:15:07Z",
      severity: "HIGH",
   },
   details: "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: pm: avoid possible UaF when selecting endp\n\nselect_local_address() and select_signal_address() both select an\nendpoint entry from the list inside an RCU protected section, but return\na reference to it, to be read later on. If the entry is dereferenced\nafter the RCU unlock, reading info could cause a Use-after-Free.\n\nA simple solution is to copy the required info while inside the RCU\nprotected section to avoid any risk of UaF later. The address ID might\nneed to be modified later to handle the ID0 case later, so a copy seems\nOK to deal with.",
   id: "GHSA-mgf7-9fq3-64j5",
   modified: "2024-09-12T12:30:28Z",
   published: "2024-09-04T21:30:32Z",
   references: [
      {
         type: "ADVISORY",
         url: "https://nvd.nist.gov/vuln/detail/CVE-2024-44974",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/0201d65d9806d287a00e0ba96f0321835631f63f",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/2b4f46f9503633dade75cb796dd1949d0e6581a1",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/48e50dcbcbaaf713d82bf2da5c16aeced94ad07d",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/9a9afbbc3fbfca4975eea4aa5b18556db5a0c0b8",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/ddee5b4b6a1cc03c1e9921cf34382e094c2009f1",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/f2c865e9e3ca44fc06b5f73b29a954775e4dbb38",
      },
   ],
   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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