CVE-2025-21965 (GCVE-0-2025-21965)
Vulnerability from cvelistv5
Published
2025-04-01 15:47
Modified
2025-05-04 07:25
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: sched_ext: Validate prev_cpu in scx_bpf_select_cpu_dfl() If a BPF scheduler provides an invalid CPU (outside the nr_cpu_ids range) as prev_cpu to scx_bpf_select_cpu_dfl() it can cause a kernel crash. To prevent this, validate prev_cpu in scx_bpf_select_cpu_dfl() and trigger an scx error if an invalid CPU is specified.
References
Impacted products
Vendor Product Version
Linux Linux Version: f0e1a0643a59bf1f922fa209cec86a170b784f3f
Version: f0e1a0643a59bf1f922fa209cec86a170b784f3f
Version: f0e1a0643a59bf1f922fa209cec86a170b784f3f
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/sched/ext.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "f0e1a0643a59bf1f922fa209cec86a170b784f3f",
              "versionType": "git"
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            {
              "lessThan": "515680e76c536dd4aa8e2b5d674b0d441baddf5b",
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          "defaultStatus": "affected",
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          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.12"
            },
            {
              "lessThan": "6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.20",
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            {
              "lessThanOrEqual": "6.13.*",
              "status": "unaffected",
              "version": "6.13.8",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.14",
              "versionType": "original_commit_for_fix"
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      ],
      "cpeApplicability": [
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                  "vulnerable": true
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                },
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                  "versionEndExcluding": "6.14",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsched_ext: Validate prev_cpu in scx_bpf_select_cpu_dfl()\n\nIf a BPF scheduler provides an invalid CPU (outside the nr_cpu_ids\nrange) as prev_cpu to scx_bpf_select_cpu_dfl() it can cause a kernel\ncrash.\n\nTo prevent this, validate prev_cpu in scx_bpf_select_cpu_dfl() and\ntrigger an scx error if an invalid CPU is specified."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T07:25:55.365Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/752b56bb76e2471197d25d6948d85753043b10da"
        },
        {
          "url": "https://git.kernel.org/stable/c/515680e76c536dd4aa8e2b5d674b0d441baddf5b"
        },
        {
          "url": "https://git.kernel.org/stable/c/9360dfe4cbd62ff1eb8217b815964931523b75b3"
        }
      ],
      "title": "sched_ext: Validate prev_cpu in scx_bpf_select_cpu_dfl()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-21965",
    "datePublished": "2025-04-01T15:47:01.129Z",
    "dateReserved": "2024-12-29T08:45:45.796Z",
    "dateUpdated": "2025-05-04T07:25:55.365Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-21965\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-04-01T16:15:27.767\",\"lastModified\":\"2025-04-01T20:26:01.990\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nsched_ext: Validate prev_cpu in scx_bpf_select_cpu_dfl()\\n\\nIf a BPF scheduler provides an invalid CPU (outside the nr_cpu_ids\\nrange) as prev_cpu to scx_bpf_select_cpu_dfl() it can cause a kernel\\ncrash.\\n\\nTo prevent this, validate prev_cpu in scx_bpf_select_cpu_dfl() and\\ntrigger an scx error if an invalid CPU is specified.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: sched_ext: Validar prev_cpu en scx_bpf_select_cpu_dfl(). Si un programador BPF proporciona una CPU no v\u00e1lida (fuera del rango nr_cpu_ids) como prev_cpu a scx_bpf_select_cpu_dfl(), puede provocar un fallo del kernel. Para evitarlo, valide prev_cpu en scx_bpf_select_cpu_dfl() y genere un error scx si se especifica una CPU no v\u00e1lida.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/515680e76c536dd4aa8e2b5d674b0d441baddf5b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/752b56bb76e2471197d25d6948d85753043b10da\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9360dfe4cbd62ff1eb8217b815964931523b75b3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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