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CVE-2026-74542

Estado: RecibidaSin puntuar—

In the Linux kernel, the following vulnerability has been resolved:

netfs: Fix folio_queue ENOMEM in writeback by adding a mempool

Fix the handling of folio_queue allocation failure in writeback by adding a mempool and passing in gfp_t flags to the rolling buffer functions that allocate memory, using the mempool if gfp != GFP_KERNEL.

This is then extended upwards and the gfp to be used for a request is stored in the netfs_io_request struct and is then used for both requests and subrequests, eliminating the sleeping loops there.

The failure caused:

Detalles técnicos trazas, registros y código del informe original
    folio != NULL
    WARNING: fs/netfs/write_issue.c:603 at netfs_writepages+0x883/0xa10 fs/netfs/write_issue.c:603, CPU#3: syz.0.17/5919

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-74542",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "cd0277ed0c188dd40e7744e89299af7b78831ca4",
              "lessThan": "3f6d7f8a5416d852648d15a05e895f1195ee8a85",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "cd0277ed0c188dd40e7744e89299af7b78831ca4",
              "lessThan": "1d78d56c43ef3768183e8370e7367b162700e049",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "fs/netfs/buffered_read.c",
            "fs/netfs/internal.h",
            "fs/netfs/main.c",
            "fs/netfs/objects.c",
            "fs/netfs/read_pgpriv2.c",
            "fs/netfs/rolling_buffer.c",
            "fs/netfs/write_issue.c",
            "include/linux/netfs.h",
            "include/linux/rolling_buffer.h"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.12"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.12",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "7.1.8",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "fs/netfs/buffered_read.c",
            "fs/netfs/internal.h",
            "fs/netfs/main.c",
            "fs/netfs/objects.c",
            "fs/netfs/read_pgpriv2.c",
            "fs/netfs/rolling_buffer.c",
            "fs/netfs/write_issue.c",
            "include/linux/netfs.h",
            "include/linux/rolling_buffer.h"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-15T13:17:59.543",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/1d78d56c43ef3768183e8370e7367b162700e049",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3f6d7f8a5416d852648d15a05e895f1195ee8a85",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Fix folio_queue ENOMEM in writeback by adding a mempool\n\nFix the handling of folio_queue allocation failure in writeback by adding a\nmempool and passing in gfp_t flags to the rolling buffer functions that\nallocate memory, using the mempool if gfp != GFP_KERNEL.\n\nThis is then extended upwards and the gfp to be used for a request is stored\nin the netfs_io_request struct and is then used for both requests and\nsubrequests, eliminating the sleeping loops there.\n\nThe failure caused:\n\n    folio != NULL\n    WARNING: fs/netfs/write_issue.c:603 at netfs_writepages+0x883/0xa10 fs/netfs/write_issue.c:603, CPU#3: syz.0.17/5919"
    }
  ],
  "lastModified": "2026-08-17T06:19:51.413",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}