cve-2024-56709
Vulnerability from cvelistv5
Published
2024-12-29 08:42
Modified
2025-01-20 06:26
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: io_uring: check if iowq is killed before queuing task work can be executed after the task has gone through io_uring termination, whether it's the final task_work run or the fallback path. In this case, task work will find ->io_wq being already killed and null'ed, which is a problem if it then tries to forward the request to io_queue_iowq(). Make io_queue_iowq() fail requests in this case. Note that it also checks PF_KTHREAD, because the user can first close a DEFER_TASKRUN ring and shortly after kill the task, in which case ->iowq check would race.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2ca94c8de36091067b9ce7527ae8db3812d38781
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4f95a2186b7f2af09331e1e8069bcaf34fe019cf
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/534d59ab38010aada88390db65985e65d0de7d9e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dbd2ca9367eb19bc5e269b8c58b0b1514ada9156
Impacted products
Vendor Product Version
Linux Linux Version: 773af69121ecc6c53d192661af8d53bb3db028ae
Version: 773af69121ecc6c53d192661af8d53bb3db028ae
Version: 773af69121ecc6c53d192661af8d53bb3db028ae
Version: 773af69121ecc6c53d192661af8d53bb3db028ae
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   Linux Linux Version: 5.14
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "io_uring/io_uring.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "0",
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              "version": "6.1.122",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
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              "version": "6.6.68",
              "versionType": "semver"
            },
            {
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              "version": "6.12.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.13",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring: check if iowq is killed before queuing\n\ntask work can be executed after the task has gone through io_uring\ntermination, whether it\u0027s the final task_work run or the fallback path.\nIn this case, task work will find -\u003eio_wq being already killed and\nnull\u0027ed, which is a problem if it then tries to forward the request to\nio_queue_iowq(). Make io_queue_iowq() fail requests in this case.\n\nNote that it also checks PF_KTHREAD, because the user can first close\na DEFER_TASKRUN ring and shortly after kill the task, in which case\n-\u003eiowq check would race."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-01-20T06:26:38.450Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/534d59ab38010aada88390db65985e65d0de7d9e"
        },
        {
          "url": "https://git.kernel.org/stable/c/2ca94c8de36091067b9ce7527ae8db3812d38781"
        },
        {
          "url": "https://git.kernel.org/stable/c/4f95a2186b7f2af09331e1e8069bcaf34fe019cf"
        },
        {
          "url": "https://git.kernel.org/stable/c/dbd2ca9367eb19bc5e269b8c58b0b1514ada9156"
        }
      ],
      "title": "io_uring: check if iowq is killed before queuing",
      "x_generator": {
        "engine": "bippy-5f407fcff5a0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-56709",
    "datePublished": "2024-12-29T08:42:58.403Z",
    "dateReserved": "2024-12-27T15:00:39.857Z",
    "dateUpdated": "2025-01-20T06:26:38.450Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-56709\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-12-29T09:15:05.820\",\"lastModified\":\"2024-12-29T09:15:05.820\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nio_uring: check if iowq is killed before queuing\\n\\ntask work can be executed after the task has gone through io_uring\\ntermination, whether it\u0027s the final task_work run or the fallback path.\\nIn this case, task work will find -\u003eio_wq being already killed and\\nnull\u0027ed, which is a problem if it then tries to forward the request to\\nio_queue_iowq(). Make io_queue_iowq() fail requests in this case.\\n\\nNote that it also checks PF_KTHREAD, because the user can first close\\na DEFER_TASKRUN ring and shortly after kill the task, in which case\\n-\u003eiowq check would race.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2ca94c8de36091067b9ce7527ae8db3812d38781\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4f95a2186b7f2af09331e1e8069bcaf34fe019cf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/534d59ab38010aada88390db65985e65d0de7d9e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/dbd2ca9367eb19bc5e269b8c58b0b1514ada9156\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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