CVE-2025-38383 (GCVE-0-2025-38383)
Vulnerability from cvelistv5
Published
2025-07-25 12:53
Modified
2025-07-28 04:20
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: mm/vmalloc: fix data race in show_numa_info() The following data-race was found in show_numa_info(): ================================================================== BUG: KCSAN: data-race in vmalloc_info_show / vmalloc_info_show read to 0xffff88800971fe30 of 4 bytes by task 8289 on cpu 0: show_numa_info mm/vmalloc.c:4936 [inline] vmalloc_info_show+0x5a8/0x7e0 mm/vmalloc.c:5016 seq_read_iter+0x373/0xb40 fs/seq_file.c:230 proc_reg_read_iter+0x11e/0x170 fs/proc/inode.c:299 .... write to 0xffff88800971fe30 of 4 bytes by task 8287 on cpu 1: show_numa_info mm/vmalloc.c:4934 [inline] vmalloc_info_show+0x38f/0x7e0 mm/vmalloc.c:5016 seq_read_iter+0x373/0xb40 fs/seq_file.c:230 proc_reg_read_iter+0x11e/0x170 fs/proc/inode.c:299 .... value changed: 0x0000008f -> 0x00000000 ================================================================== According to this report,there is a read/write data-race because m->private is accessible to multiple CPUs. To fix this, instead of allocating the heap in proc_vmalloc_init() and passing the heap address to m->private, vmalloc_info_show() should allocate the heap.
References
Impacted products
Vendor Product Version
Linux Linux Version: 8e1d743f2c2671aa54f6f91a2b33823f92512870
Version: 8e1d743f2c2671aa54f6f91a2b33823f92512870
Version: 8e1d743f2c2671aa54f6f91a2b33823f92512870
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "mm/vmalloc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ead91de35d9cd5c4f80ec51e6020f342079170af",
              "status": "affected",
              "version": "8e1d743f2c2671aa54f6f91a2b33823f92512870",
              "versionType": "git"
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            {
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        {
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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": "6.9"
            },
            {
              "lessThan": "6.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.37",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.15.*",
              "status": "unaffected",
              "version": "6.15.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.16",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.37",
                  "versionStartIncluding": "6.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.15.6",
                  "versionStartIncluding": "6.9",
                  "vulnerable": true
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                  "versionEndExcluding": "6.16",
                  "versionStartIncluding": "6.9",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/vmalloc: fix data race in show_numa_info()\n\nThe following data-race was found in show_numa_info():\n\n==================================================================\nBUG: KCSAN: data-race in vmalloc_info_show / vmalloc_info_show\n\nread to 0xffff88800971fe30 of 4 bytes by task 8289 on cpu 0:\n show_numa_info mm/vmalloc.c:4936 [inline]\n vmalloc_info_show+0x5a8/0x7e0 mm/vmalloc.c:5016\n seq_read_iter+0x373/0xb40 fs/seq_file.c:230\n proc_reg_read_iter+0x11e/0x170 fs/proc/inode.c:299\n....\n\nwrite to 0xffff88800971fe30 of 4 bytes by task 8287 on cpu 1:\n show_numa_info mm/vmalloc.c:4934 [inline]\n vmalloc_info_show+0x38f/0x7e0 mm/vmalloc.c:5016\n seq_read_iter+0x373/0xb40 fs/seq_file.c:230\n proc_reg_read_iter+0x11e/0x170 fs/proc/inode.c:299\n....\n\nvalue changed: 0x0000008f -\u003e 0x00000000\n==================================================================\n\nAccording to this report,there is a read/write data-race because\nm-\u003eprivate is accessible to multiple CPUs.  To fix this, instead of\nallocating the heap in proc_vmalloc_init() and passing the heap address to\nm-\u003eprivate, vmalloc_info_show() should allocate the heap."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-28T04:20:37.469Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/ead91de35d9cd5c4f80ec51e6020f342079170af"
        },
        {
          "url": "https://git.kernel.org/stable/c/5c966f447a584ece3c70395898231aeb56256ee7"
        },
        {
          "url": "https://git.kernel.org/stable/c/5c5f0468d172ddec2e333d738d2a1f85402cf0bc"
        }
      ],
      "title": "mm/vmalloc: fix data race in show_numa_info()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38383",
    "datePublished": "2025-07-25T12:53:24.578Z",
    "dateReserved": "2025-04-16T04:51:24.010Z",
    "dateUpdated": "2025-07-28T04:20:37.469Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38383\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-07-25T13:15:27.520\",\"lastModified\":\"2025-07-25T15:29:19.837\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmm/vmalloc: fix data race in show_numa_info()\\n\\nThe following data-race was found in show_numa_info():\\n\\n==================================================================\\nBUG: KCSAN: data-race in vmalloc_info_show / vmalloc_info_show\\n\\nread to 0xffff88800971fe30 of 4 bytes by task 8289 on cpu 0:\\n show_numa_info mm/vmalloc.c:4936 [inline]\\n vmalloc_info_show+0x5a8/0x7e0 mm/vmalloc.c:5016\\n seq_read_iter+0x373/0xb40 fs/seq_file.c:230\\n proc_reg_read_iter+0x11e/0x170 fs/proc/inode.c:299\\n....\\n\\nwrite to 0xffff88800971fe30 of 4 bytes by task 8287 on cpu 1:\\n show_numa_info mm/vmalloc.c:4934 [inline]\\n vmalloc_info_show+0x38f/0x7e0 mm/vmalloc.c:5016\\n seq_read_iter+0x373/0xb40 fs/seq_file.c:230\\n proc_reg_read_iter+0x11e/0x170 fs/proc/inode.c:299\\n....\\n\\nvalue changed: 0x0000008f -\u003e 0x00000000\\n==================================================================\\n\\nAccording to this report,there is a read/write data-race because\\nm-\u003eprivate is accessible to multiple CPUs.  To fix this, instead of\\nallocating the heap in proc_vmalloc_init() and passing the heap address to\\nm-\u003eprivate, vmalloc_info_show() should allocate the heap.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/5c5f0468d172ddec2e333d738d2a1f85402cf0bc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5c966f447a584ece3c70395898231aeb56256ee7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ead91de35d9cd5c4f80ec51e6020f342079170af\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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