CVE-2026-98686

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: smb: client: discard post-EOF pagecache when extending a file via zero range smb3_zero_range() removed the pagecache only for the range being zeroed, so when it extends the file the folio straddling the old EOF - which may hold data dirtied past EOF through an mmap - was never dropped and became visible as file content once the file was extended. Lower the discard boundary to the smaller of the zero-range offset and the old EOF.

Severity

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-10-18 16:17:21.993000

Last modified

2026-10-30 13:21:18.100000

View original CVE JSON

{
  "id": "CVE-2026-98686",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-10-18T16:17:21.993",
  "lastModified": "2026-10-30T13:21:18.100",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: discard post-EOF pagecache when extending a file via zero range\n\nsmb3_zero_range() removed the pagecache only for the range being zeroed,\nso when it extends the file the folio straddling the old EOF - which may\nhold data dirtied past EOF through an mmap - was never dropped and became\nvisible as file content once the file was extended.\n\nLower the discard boundary to the smaller of the zero-range offset and the\nold EOF."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "fs/smb/client/smb2ops.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "72c419d9b073628d3b5b0b2fc787b724f1a8c726",
              "lessThan": "1ecf89d8efca618e0c758c06b9a1fdde8bd941da",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "72c419d9b073628d3b5b0b2fc787b724f1a8c726",
              "lessThan": "03408d15c5405f8dc3e1a114cdce2174027a85f6",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "72c419d9b073628d3b5b0b2fc787b724f1a8c726",
              "lessThan": "3df27277f8f95345d4a6c57367824bf1aefdbf66",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "72c419d9b073628d3b5b0b2fc787b724f1a8c726",
              "lessThan": "94949b6b2f2bf0dba2e8786aed0b08cc6bc3a183",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "72c419d9b073628d3b5b0b2fc787b724f1a8c726",
              "lessThan": "b75dadb50a25eed525264bf6fea44fad94e7626f",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "72c419d9b073628d3b5b0b2fc787b724f1a8c726",
              "lessThan": "6a8279c98ad289b27c0bdb11adb3f0c0b7fd456d",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "72c419d9b073628d3b5b0b2fc787b724f1a8c726",
              "lessThan": "da4fe97fb6c730d9c94a115c7bfa6f98e0d578d0",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "fs/smb/client/smb2ops.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "5.1",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "5.1",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.15.224",
              "lessThanOrEqual": "5.15.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.191",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.160",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.113",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.56",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.10",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/03408d15c5405f8dc3e1a114cdce2174027a85f6",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/1ecf89d8efca618e0c758c06b9a1fdde8bd941da",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3df27277f8f95345d4a6c57367824bf1aefdbf66",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6a8279c98ad289b27c0bdb11adb3f0c0b7fd456d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/94949b6b2f2bf0dba2e8786aed0b08cc6bc3a183",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b75dadb50a25eed525264bf6fea44fad94e7626f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/da4fe97fb6c730d9c94a115c7bfa6f98e0d578d0",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}