CVE-2025-38534 (GCVE-0-2025-38534)
Vulnerability from cvelistv5
Published
2025-08-16 11:12
Modified
2025-08-16 11:12
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: netfs: Fix copy-to-cache so that it performs collection with ceph+fscache The netfs copy-to-cache that is used by Ceph with local caching sets up a new request to write data just read to the cache. The request is started and then left to look after itself whilst the app continues. The request gets notified by the backing fs upon completion of the async DIO write, but then tries to wake up the app because NETFS_RREQ_OFFLOAD_COLLECTION isn't set - but the app isn't waiting there, and so the request just hangs. Fix this by setting NETFS_RREQ_OFFLOAD_COLLECTION which causes the notification from the backing filesystem to put the collection onto a work queue instead.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1ebe58cef84eab22b41b4d5e72c2051ebf00af50
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4c238e30774e3022a505fa54311273add7570f13
Impacted products
Vendor Product Version
Linux Linux Version: e2d46f2ec332533816417b60933954173f602121
Version: e2d46f2ec332533816417b60933954173f602121
 Create a notification for this product.
   Linux Linux Version: 6.14
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/netfs/read_pgpriv2.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "1ebe58cef84eab22b41b4d5e72c2051ebf00af50",
              "status": "affected",
              "version": "e2d46f2ec332533816417b60933954173f602121",
              "versionType": "git"
            },
            {
              "lessThan": "4c238e30774e3022a505fa54311273add7570f13",
              "status": "affected",
              "version": "e2d46f2ec332533816417b60933954173f602121",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/netfs/read_pgpriv2.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.14"
            },
            {
              "lessThan": "6.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.15.*",
              "status": "unaffected",
              "version": "6.15.8",
              "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": "6.15.8",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.16",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Fix copy-to-cache so that it performs collection with ceph+fscache\n\nThe netfs copy-to-cache that is used by Ceph with local caching sets up a\nnew request to write data just read to the cache.  The request is started\nand then left to look after itself whilst the app continues.  The request\ngets notified by the backing fs upon completion of the async DIO write, but\nthen tries to wake up the app because NETFS_RREQ_OFFLOAD_COLLECTION isn\u0027t\nset - but the app isn\u0027t waiting there, and so the request just hangs.\n\nFix this by setting NETFS_RREQ_OFFLOAD_COLLECTION which causes the\nnotification from the backing filesystem to put the collection onto a work\nqueue instead."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-08-16T11:12:27.014Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/1ebe58cef84eab22b41b4d5e72c2051ebf00af50"
        },
        {
          "url": "https://git.kernel.org/stable/c/4c238e30774e3022a505fa54311273add7570f13"
        }
      ],
      "title": "netfs: Fix copy-to-cache so that it performs collection with ceph+fscache",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38534",
    "datePublished": "2025-08-16T11:12:27.014Z",
    "dateReserved": "2025-04-16T04:51:24.023Z",
    "dateUpdated": "2025-08-16T11:12:27.014Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38534\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-08-16T12:15:29.087\",\"lastModified\":\"2025-08-18T20:16:28.750\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnetfs: Fix copy-to-cache so that it performs collection with ceph+fscache\\n\\nThe netfs copy-to-cache that is used by Ceph with local caching sets up a\\nnew request to write data just read to the cache.  The request is started\\nand then left to look after itself whilst the app continues.  The request\\ngets notified by the backing fs upon completion of the async DIO write, but\\nthen tries to wake up the app because NETFS_RREQ_OFFLOAD_COLLECTION isn\u0027t\\nset - but the app isn\u0027t waiting there, and so the request just hangs.\\n\\nFix this by setting NETFS_RREQ_OFFLOAD_COLLECTION which causes the\\nnotification from the backing filesystem to put the collection onto a work\\nqueue instead.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfs: Arreglar la copia a cach\u00e9 para que realice la recolecci\u00f3n con ceph+fscache La copia a cach\u00e9 de netfs que usa Ceph con cach\u00e9 local configura una nueva solicitud para escribir datos reci\u00e9n le\u00eddos en la cach\u00e9. La solicitud se inicia y luego se deja que se cuide a s\u00ed misma mientras la aplicaci\u00f3n contin\u00faa. La solicitud es notificada por el sistema de archivos de respaldo al completarse la escritura DIO as\u00edncrona, pero luego intenta despertar la aplicaci\u00f3n porque NETFS_RREQ_OFFLOAD_COLLECTION no est\u00e1 configurado, pero la aplicaci\u00f3n no est\u00e1 esperando all\u00ed, y por lo tanto la solicitud simplemente se cuelga. Arregla esto configurando NETFS_RREQ_OFFLOAD_COLLECTION que hace que la notificaci\u00f3n del sistema de archivos de respaldo coloque la recolecci\u00f3n en una cola de trabajo.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1ebe58cef84eab22b41b4d5e72c2051ebf00af50\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4c238e30774e3022a505fa54311273add7570f13\",\"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.