{
  "id": "CVE-2023-4623",
  "sourceIdentifier": "cve-coordination@google.com",
  "published": "2023-09-06T14:15:12.357",
  "lastModified": "2023-09-11T18:15:48.930",
  "vulnStatus": "Analyzed",
  "descriptions": [
    {
      "lang": "en",
      "value": "A use-after-free vulnerability in the Linux kernel's net/sched: sch_hfsc (HFSC qdisc traffic control) component can be exploited to achieve local privilege escalation.\n\nIf a class with a link-sharing curve (i.e. with the HFSC_FSC flag set) has a parent without a link-sharing curve, then init_vf() will call vttree_insert() on the parent, but vttree_remove() will be skipped in update_vf(). This leaves a dangling pointer that can cause a use-after-free.\n\nWe recommend upgrading past commit b3d26c5702c7d6c45456326e56d2ccf3f103e60f.\n\n"
    }
  ],
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          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
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          "baseScore": 7.8,
          "baseSeverity": "HIGH"
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        "exploitabilityScore": 1.8,
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      "source": "nvd@nist.gov",
      "type": "Primary",
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          "value": "CWE-416"
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    },
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          "negate": false,
          "cpeMatch": [
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              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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  "references": [
    {
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b3d26c5702c7d6c45456326e56d2ccf3f103e60f",
      "source": "cve-coordination@google.com",
      "tags": [
        "Issue Tracking",
        "Mailing List",
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        "Vendor Advisory"
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    },
    {
      "url": "https://kernel.dance/b3d26c5702c7d6c45456326e56d2ccf3f103e60f",
      "source": "cve-coordination@google.com",
      "tags": [
        "Patch",
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}