CVE-2025-68348 (GCVE-0-2025-68348)

Vulnerability from cvelistv5 – Published: 2025-12-24 10:32 – Updated: 2026-05-11 21:51
VLAI
Title
block: fix memory leak in __blkdev_issue_zero_pages
Summary
In the Linux kernel, the following vulnerability has been resolved: block: fix memory leak in __blkdev_issue_zero_pages Move the fatal signal check before bio_alloc() to prevent a memory leak when BLKDEV_ZERO_KILLABLE is set and a fatal signal is pending. Previously, the bio was allocated before checking for a fatal signal. If a signal was pending, the code would break out of the loop without freeing or chaining the just-allocated bio, causing a memory leak. This matches the pattern already used in __blkdev_issue_write_zeroes() where the signal check precedes the allocation.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6971 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: bf86bcdb40123ee99669ee91b67e023669433a1a , < 453e4b0c84d0db1454ff0adf655d91179e6fca3a (git)
Affected: bf86bcdb40123ee99669ee91b67e023669433a1a , < 7957635c679e8a01147163a3a4a1f16e1210fa03 (git)
Affected: bf86bcdb40123ee99669ee91b67e023669433a1a , < 7193407bc4457212fa38ec3aff9c640e63a8dbef (git)
Affected: bf86bcdb40123ee99669ee91b67e023669433a1a , < f7e3f852a42d7cd8f1af2c330d9d153e30c8adcf (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.11
Unaffected: 0 , < 6.11 (semver)
Unaffected: 6.12.63 , ≤ 6.12.* (semver)
Unaffected: 6.17.13 , ≤ 6.17.* (semver)
Unaffected: 6.18.2 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "block/blk-lib.c"
          ],
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          "vendor": "Linux",
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              "negate": false,
              "operator": "OR"
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: fix memory leak in __blkdev_issue_zero_pages\n\nMove the fatal signal check before bio_alloc() to prevent a memory\nleak when BLKDEV_ZERO_KILLABLE is set and a fatal signal is pending.\n\nPreviously, the bio was allocated before checking for a fatal signal.\nIf a signal was pending, the code would break out of the loop without\nfreeing or chaining the just-allocated bio, causing a memory leak.\n\nThis matches the pattern already used in __blkdev_issue_write_zeroes()\nwhere the signal check precedes the allocation."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T21:51:27.551Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/453e4b0c84d0db1454ff0adf655d91179e6fca3a"
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          "url": "https://git.kernel.org/stable/c/f7e3f852a42d7cd8f1af2c330d9d153e30c8adcf"
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      ],
      "title": "block: fix memory leak in __blkdev_issue_zero_pages",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68348",
    "datePublished": "2025-12-24T10:32:40.561Z",
    "dateReserved": "2025-12-16T14:48:05.300Z",
    "dateUpdated": "2026-05-11T21:51:27.551Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
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      "date": "2026-11-01",
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      "percentile": "0.10126"
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                "programFiles": [
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        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: fix memory leak in __blkdev_issue_zero_pages\n\nMove the fatal signal check before bio_alloc() to prevent a memory\nleak when BLKDEV_ZERO_KILLABLE is set and a fatal signal is pending.\n\nPreviously, the bio was allocated before checking for a fatal signal.\nIf a signal was pending, the code would break out of the loop without\nfreeing or chaining the just-allocated bio, causing a memory leak.\n\nThis matches the pattern already used in __blkdev_issue_write_zeroes()\nwhere the signal check precedes the allocation."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha corregido la siguiente vulnerabilidad:\\n\\nblock: corregir fuga de memoria en __blkdev_issue_zero_pages\\n\\nMover la comprobaci\u00f3n de se\u00f1al fatal antes de bio_alloc() para evitar una fuga de memoria cuando BLKDEV_ZERO_KILLABLE est\u00e1 activado y hay una se\u00f1al fatal pendiente.\\n\\nAnteriormente, el bio se asignaba antes de verificar la se\u00f1al fatal. Si hab\u00eda una se\u00f1al pendiente, el c\u00f3digo sal\u00eda del bucle sin liberar ni encadenar el bio reci\u00e9n asignado, provocando una fuga de memoria.\\n\\nEsto coincide con el patr\u00f3n ya utilizado en __blkdev_issue_write_zeroes() donde la comprobaci\u00f3n de la se\u00f1al precede a la asignaci\u00f3n."
          }
        ],
        "id": "CVE-2025-68348",
        "lastModified": "2026-10-19T21:10:00.160",
        "metrics": {},
        "published": "2025-12-24T11:15:58.147",
        "references": [
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      "title": "SUSE CVE CVE-2025-68348",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2025/cve-2025-68348.json",
      "version": "27"
    }
  }
}



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