CVE-2026-31715 f2fs: fix UAF caused by decrementing sbi->nr_pages[] in f2fs_write_end_io()

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/f2fs/data.c"
    ],
    "versions": [
      {
        "version": "50fa53eccf9f911a5b435248a2b0bd484fd82e5e",
        "lessThan": "1171f329cf1c175321251ac40fd126150d7ad1e8",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "50fa53eccf9f911a5b435248a2b0bd484fd82e5e",
        "lessThan": "7be222de96c0f9eee6e65eeb017ef855ee185cfa",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "50fa53eccf9f911a5b435248a2b0bd484fd82e5e",
        "lessThan": "963d2e24d9d92a31e6773b0f642214f10013ebf7",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "50fa53eccf9f911a5b435248a2b0bd484fd82e5e",
        "lessThan": "188bb65f247a7a7c62f287c9a263aee3cad96fa5",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "50fa53eccf9f911a5b435248a2b0bd484fd82e5e",
        "lessThan": "2d9c4a4ed4eef1f82c5b16b037aee8bad819fd53",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/f2fs/data.c"
    ],
    "versions": [
      {
        "version": "4.19",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "4.19",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.140",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.86",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.25",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.0.2",
        "lessThanOrEqual": "7.0.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1-rc1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]