CVE-2025-39697 (GCVE-0-2025-39697)
Vulnerability from cvelistv5
Published
2025-09-05 17:21
Modified
2025-09-29 05:57
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: NFS: Fix a race when updating an existing write After nfs_lock_and_join_requests() tests for whether the request is still attached to the mapping, nothing prevents a call to nfs_inode_remove_request() from succeeding until we actually lock the page group. The reason is that whoever called nfs_inode_remove_request() doesn't necessarily have a lock on the page group head. So in order to avoid races, let's take the page group lock earlier in nfs_lock_and_join_requests(), and hold it across the removal of the request in nfs_inode_remove_request().
References
Impacted products
Vendor Product Version
Linux Linux Version: bd37d6fce184836bd5e7cd90ce40116a4fadaf2a
Version: bd37d6fce184836bd5e7cd90ce40116a4fadaf2a
Version: bd37d6fce184836bd5e7cd90ce40116a4fadaf2a
Version: bd37d6fce184836bd5e7cd90ce40116a4fadaf2a
Version: bd37d6fce184836bd5e7cd90ce40116a4fadaf2a
Version: bd37d6fce184836bd5e7cd90ce40116a4fadaf2a
Version: bd37d6fce184836bd5e7cd90ce40116a4fadaf2a
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/nfs/pagelist.c",
            "fs/nfs/write.c",
            "include/linux/nfs_page.h"
          ],
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          "vendor": "Linux",
          "versions": [
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.242",
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            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.191",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.150",
              "versionType": "semver"
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            {
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              "version": "6.6.104",
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            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.44",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.16.*",
              "status": "unaffected",
              "version": "6.16.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.17",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.242",
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                  "vulnerable": true
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFS: Fix a race when updating an existing write\n\nAfter nfs_lock_and_join_requests() tests for whether the request is\nstill attached to the mapping, nothing prevents a call to\nnfs_inode_remove_request() from succeeding until we actually lock the\npage group.\nThe reason is that whoever called nfs_inode_remove_request() doesn\u0027t\nnecessarily have a lock on the page group head.\n\nSo in order to avoid races, let\u0027s take the page group lock earlier in\nnfs_lock_and_join_requests(), and hold it across the removal of the\nrequest in nfs_inode_remove_request()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-29T05:57:37.628Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0ff42a32784e0f2cb46a46da8e9f473538c13e1b"
        },
        {
          "url": "https://git.kernel.org/stable/c/f230d40147cc37eb3aef4d50e2e2c06ea73d9a77"
        },
        {
          "url": "https://git.kernel.org/stable/c/c32e3c71aaa1c1ba05da88605e2ddd493c58794f"
        },
        {
          "url": "https://git.kernel.org/stable/c/181feb41f0b268e6288bf9a7b984624d7fe2031d"
        },
        {
          "url": "https://git.kernel.org/stable/c/92278ae36935a54e65fef9f8ea8efe7e80481ace"
        },
        {
          "url": "https://git.kernel.org/stable/c/202a3432d21ac060629a760fff3b0a39859da3ea"
        },
        {
          "url": "https://git.kernel.org/stable/c/76d2e3890fb169168c73f2e4f8375c7cc24a765e"
        }
      ],
      "title": "NFS: Fix a race when updating an existing write",
      "x_generator": {
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      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-39697",
    "datePublished": "2025-09-05T17:21:03.178Z",
    "dateReserved": "2025-04-16T07:20:57.115Z",
    "dateUpdated": "2025-09-29T05:57:37.628Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-39697\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-05T18:15:46.623\",\"lastModified\":\"2025-09-08T16:25:38.810\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nNFS: Fix a race when updating an existing write\\n\\nAfter nfs_lock_and_join_requests() tests for whether the request is\\nstill attached to the mapping, nothing prevents a call to\\nnfs_inode_remove_request() from succeeding until we actually lock the\\npage group.\\nThe reason is that whoever called nfs_inode_remove_request() doesn\u0027t\\nnecessarily have a lock on the page group head.\\n\\nSo in order to avoid races, let\u0027s take the page group lock earlier in\\nnfs_lock_and_join_requests(), and hold it across the removal of the\\nrequest in nfs_inode_remove_request().\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0ff42a32784e0f2cb46a46da8e9f473538c13e1b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/181feb41f0b268e6288bf9a7b984624d7fe2031d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/202a3432d21ac060629a760fff3b0a39859da3ea\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/76d2e3890fb169168c73f2e4f8375c7cc24a765e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/92278ae36935a54e65fef9f8ea8efe7e80481ace\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c32e3c71aaa1c1ba05da88605e2ddd493c58794f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f230d40147cc37eb3aef4d50e2e2c06ea73d9a77\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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