CVE-2025-38717 (GCVE-0-2025-38717)
Vulnerability from cvelistv5
Published
2025-09-04 15:33
Modified
2025-09-04 15:33
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: net: kcm: Fix race condition in kcm_unattach() syzbot found a race condition when kcm_unattach(psock) and kcm_release(kcm) are executed at the same time. kcm_unattach() is missing a check of the flag kcm->tx_stopped before calling queue_work(). If the kcm has a reserved psock, kcm_unattach() might get executed between cancel_work_sync() and unreserve_psock() in kcm_release(), requeuing kcm->tx_work right before kcm gets freed in kcm_done(). Remove kcm->tx_stopped and replace it by the less error-prone disable_work_sync().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/52565a935213cd6a8662ddb8efe5b4219343a25d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7275dc3bb8f91b23125ff3f47b6529935cf46152
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/798733ee5d5788b12e8a52db1519abc17e826f69
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c0bffbc92a1ca3960fb9cdb8e9f75a68468eb308
Impacted products
Vendor Product Version
Linux Linux Version: ab7ac4eb9832e32a09f4e8042705484d2fb0aad3
Version: ab7ac4eb9832e32a09f4e8042705484d2fb0aad3
Version: ab7ac4eb9832e32a09f4e8042705484d2fb0aad3
Version: ab7ac4eb9832e32a09f4e8042705484d2fb0aad3
 Create a notification for this product.
   Linux Linux Version: 4.6
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/net/kcm.h",
            "net/kcm/kcmsock.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c0bffbc92a1ca3960fb9cdb8e9f75a68468eb308",
              "status": "affected",
              "version": "ab7ac4eb9832e32a09f4e8042705484d2fb0aad3",
              "versionType": "git"
            },
            {
              "lessThan": "7275dc3bb8f91b23125ff3f47b6529935cf46152",
              "status": "affected",
              "version": "ab7ac4eb9832e32a09f4e8042705484d2fb0aad3",
              "versionType": "git"
            },
            {
              "lessThan": "798733ee5d5788b12e8a52db1519abc17e826f69",
              "status": "affected",
              "version": "ab7ac4eb9832e32a09f4e8042705484d2fb0aad3",
              "versionType": "git"
            },
            {
              "lessThan": "52565a935213cd6a8662ddb8efe5b4219343a25d",
              "status": "affected",
              "version": "ab7ac4eb9832e32a09f4e8042705484d2fb0aad3",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "include/net/kcm.h",
            "net/kcm/kcmsock.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.6"
            },
            {
              "lessThan": "4.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.43",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.15.*",
              "status": "unaffected",
              "version": "6.15.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.16.*",
              "status": "unaffected",
              "version": "6.16.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.17-rc2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.43",
                  "versionStartIncluding": "4.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.15.11",
                  "versionStartIncluding": "4.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.16.2",
                  "versionStartIncluding": "4.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17-rc2",
                  "versionStartIncluding": "4.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: kcm: Fix race condition in kcm_unattach()\n\nsyzbot found a race condition when kcm_unattach(psock)\nand kcm_release(kcm) are executed at the same time.\n\nkcm_unattach() is missing a check of the flag\nkcm-\u003etx_stopped before calling queue_work().\n\nIf the kcm has a reserved psock, kcm_unattach() might get executed\nbetween cancel_work_sync() and unreserve_psock() in kcm_release(),\nrequeuing kcm-\u003etx_work right before kcm gets freed in kcm_done().\n\nRemove kcm-\u003etx_stopped and replace it by the less\nerror-prone disable_work_sync()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-04T15:33:11.686Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c0bffbc92a1ca3960fb9cdb8e9f75a68468eb308"
        },
        {
          "url": "https://git.kernel.org/stable/c/7275dc3bb8f91b23125ff3f47b6529935cf46152"
        },
        {
          "url": "https://git.kernel.org/stable/c/798733ee5d5788b12e8a52db1519abc17e826f69"
        },
        {
          "url": "https://git.kernel.org/stable/c/52565a935213cd6a8662ddb8efe5b4219343a25d"
        }
      ],
      "title": "net: kcm: Fix race condition in kcm_unattach()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38717",
    "datePublished": "2025-09-04T15:33:11.686Z",
    "dateReserved": "2025-04-16T04:51:24.033Z",
    "dateUpdated": "2025-09-04T15:33:11.686Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38717\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-04T16:15:41.257\",\"lastModified\":\"2025-09-05T17:47:24.833\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: kcm: Fix race condition in kcm_unattach()\\n\\nsyzbot found a race condition when kcm_unattach(psock)\\nand kcm_release(kcm) are executed at the same time.\\n\\nkcm_unattach() is missing a check of the flag\\nkcm-\u003etx_stopped before calling queue_work().\\n\\nIf the kcm has a reserved psock, kcm_unattach() might get executed\\nbetween cancel_work_sync() and unreserve_psock() in kcm_release(),\\nrequeuing kcm-\u003etx_work right before kcm gets freed in kcm_done().\\n\\nRemove kcm-\u003etx_stopped and replace it by the less\\nerror-prone disable_work_sync().\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/52565a935213cd6a8662ddb8efe5b4219343a25d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7275dc3bb8f91b23125ff3f47b6529935cf46152\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/798733ee5d5788b12e8a52db1519abc17e826f69\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c0bffbc92a1ca3960fb9cdb8e9f75a68468eb308\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.