kernel: netfs: Fix netfs_read_folio() to wait on writeback

cve CVE-2026-64058 2 sources, 2 claims · Watch

Red Hat writes:
kernel: netfs: Fix netfs_read_folio() to wait on writeback the claim

Severity they disagree: HIGH NVD
moderate Red Hat
CVSS they disagree: 7.8 NVD
5.5 Red Hat
Vendor: Linux NVD
Product: Linux NVD
CWE: CWE-125 NVD
CWE-367 Red Hat

How far exploitation has got

No public code known
Proof of concept
Proof of concept, verified
A Metasploit module
Exploited in the wild
Used in ransomware campaigns

Why the CVSS differs

Metric	NVD	Red Hat
Attack vector AV	local L	local L
Attack complexity AC	low L	low L
Privileges required PR	low L	low L
User interaction UI	none N	none N
Scope S	unchanged U	unchanged U
Confidentiality C	high H	none N
Integrity I	high H	none N
Availability A	high H	high H

Each source scores the same vulnerability from what it judges the attack to need. The rows marked are where they judge it differently.

Timeline

2026-07-19	first spoke of it: In the Linux kernel, the following vulnerability has been resolved: netfs: Fix netfs_read_folio() to wait on writeback Fix netfs_read_folio() to wait for an ongoing writeback to complete so that it can trust the dirty flag and whatever is attached to folio->private (folio->private may get cleaned up by the collector before it clears the writeback flag).	NVD
2026-07-19	first spoke of it: kernel: netfs: Fix netfs_read_folio() to wait on writeback	Red Hat

What it is to other things

affects	linux/linux_kernel NVD
made_by	linux NVD

In words only, so not counted until a person confirms one:

affects

linux/linux

NVD says “Linux · Linux”

Every value, with what each source said and its receipt

Property Source Said Means here

CVSS

cvss

conflict

NVD

7.8

receipt

Source: NVD
Its words: 7.8
Read by: field:cve.metrics.cvssMetricV31[type=Primary].cvssData.baseScore || field:cve.metrics.cvssMetricV31[].cvssData.baseScore
Said since: 2026-09-29 09:45 UTC
Last answered: 2026-10-06 12:41 UTC
Original: open at the source

What the source handed over

{
  "cve": {
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      {
        "affectedData": [
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            "product": "Linux",
            "programFiles": [
              "fs/netfs/buffered_read.c"
            ],
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                "versionType": "git"
              },
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                "versionType": "git"
              },
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                "lessThan": "ded0c6f1606061148c202825f7e53d711f9f84cf",
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                "version": "ee4cdf7ba857a894ad1650d6ab77669cbbfa329e",
                "versionType": "git"
              }
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          },
          {
            "defaultStatus": "affected",
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            ],
            "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
            "vendor": "Linux",
            "versions": [
              {
                "status": "affected",
                "version": "6.12"
              },
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                "version": "6.12.110",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "6.18.*",
                "status": "unaffected",
                "version": "6.18.34",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "7.0.*",
                "status": "unaffected",
                "version": "7.0.11",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "*",
                "status": "unaffected",
                "version": "7.1",
                "versionType": "original_commit_for_fix"
              }
            ]
          }
        ],
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      }
    ],
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                "versionEndExcluding": "6.18.34",
                "versionStartIncluding": "6.12",
                "vulnerable": true
              },
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              },
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            "negate": false,
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    "cveTags": [],
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      {
        "lang": "en",
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      }
    ],
    "id": "CVE-2026-64058",
    "lastModified": "2026-09-14T12:17:44.067",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 1.8,
          "impactScore": 5.9,
          "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
          "type": "Secondary"
        }
      ]
    },
    "published": "2026-07-19T16:17:46.290",
    "references": [
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "url": "https://git.kernel.org/stable/c/090a8aa1894b72f5b3fc18dee68d42ad45f4a2c6"
      },
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "tags": [
          "Patch"
        ],
        "url": "https://git.kernel.org/stable/c/b8271cccdd5e43cc8d738afb8b51f6ad05b1cb4b"
      },
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "tags": [
          "Patch"
        ],
        "url": "https://git.kernel.org/stable/c/ded0c6f1606061148c202825f7e53d711f9f84cf"
      },
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "tags": [
          "Patch"
        ],
        "url": "https://git.kernel.org/stable/c/f17b9121bb99f88188ec9be2db5da1d561f4c01b"
      }
    ],
    "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "vulnStatus": "Modified",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-125"
          }
        ],
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  }
}

—

CVSS

cvss

conflict

Red Hat

5.5

receipt

Source: Red Hat
Its words: 5.5
Read by: field:cvss3_score
Said since: 2026-09-29 09:44 UTC
Last answered: 2026-10-06 13:02 UTC
Original: open at the source

What the source handed over

{
  "CVE": "CVE-2026-64058",
  "CWE": "CWE-367",
  "advisories": [],
  "affected_packages": [],
  "bugzilla": "2502565",
  "bugzilla_description": "kernel: netfs: Fix netfs_read_folio() to wait on writeback",
  "cvss3_score": "5.5",
  "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "cvss_score": null,
  "cvss_scoring_vector": null,
  "package_state": null,
  "public_date": "2026-07-19T00:00:00Z",
  "resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-64058.json",
  "severity": "moderate"
}

—

CVSS vector

cvss_vector

not compared

NVD

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

receipt

Source: NVD
Its words: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Read by: field:cve.metrics.cvssMetricV31[type=Primary].cvssData.vectorString || field:cve.metrics.cvssMetricV31[].cvssData.vectorString
Said since: 2026-10-06 12:29 UTC
Last answered: 2026-10-06 12:41 UTC
Original: open at the source

2026-10-06 12:29 UTC	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
2026-09-29 09:45 UTC	—

What the source handed over

{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "defaultStatus": "unaffected",
            "product": "Linux",
            "programFiles": [
              "fs/netfs/buffered_read.c"
            ],
            "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
            "vendor": "Linux",
            "versions": [
              {
                "lessThan": "090a8aa1894b72f5b3fc18dee68d42ad45f4a2c6",
                "status": "affected",
                "version": "ee4cdf7ba857a894ad1650d6ab77669cbbfa329e",
                "versionType": "git"
              },
              {
                "lessThan": "f17b9121bb99f88188ec9be2db5da1d561f4c01b",
                "status": "affected",
                "version": "ee4cdf7ba857a894ad1650d6ab77669cbbfa329e",
                "versionType": "git"
              },
              {
                "lessThan": "b8271cccdd5e43cc8d738afb8b51f6ad05b1cb4b",
                "status": "affected",
                "version": "ee4cdf7ba857a894ad1650d6ab77669cbbfa329e",
                "versionType": "git"
              },
              {
                "lessThan": "ded0c6f1606061148c202825f7e53d711f9f84cf",
                "status": "affected",
                "version": "ee4cdf7ba857a894ad1650d6ab77669cbbfa329e",
                "versionType": "git"
              }
            ]
          },
          {
            "defaultStatus": "affected",
            "product": "Linux",
            "programFiles": [
              "fs/netfs/buffered_read.c"
            ],
            "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
            "vendor": "Linux",
            "versions": [
              {
                "status": "affected",
                "version": "6.12"
              },
              {
                "lessThan": "6.12",
                "status": "unaffected",
                "version": "0",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "6.12.*",
                "status": "unaffected",
                "version": "6.12.110",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "6.18.*",
                "status": "unaffected",
                "version": "6.18.34",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "7.0.*",
                "status": "unaffected",
                "version": "7.0.11",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "*",
                "status": "unaffected",
                "version": "7.1",
                "versionType": "original_commit_for_fix"
              }
            ]
          }
        ],
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
      }
    ],
    "configurations": [
      {
        "nodes": [
          {
            "cpeMatch": [
              {
                "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "E24BD35B-0621-4C3C-AC59-EDC740418E00",
                "versionEndExcluding": "6.18.34",
                "versionStartIncluding": "6.12",
                "vulnerable": true
              },
              {
                "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "0520D091-FC52-4A50-AF07-70AE7D08B750",
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                "versionStartIncluding": "6.19",
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              {
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              },
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                "criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*",
                "matchCriteriaId": "EC732D08-5F7B-46D9-B154-E60C7F4F0A97",
                "vulnerable": true
              },
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                "criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*",
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                "vulnerable": true
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            ],
            "negate": false,
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    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Fix netfs_read_folio() to wait on writeback\n\nFix netfs_read_folio() to wait for an ongoing writeback to complete so that\nit can trust the dirty flag and whatever is attached to folio->private\n(folio->private may get cleaned up by the collector before it clears the\nwriteback flag)."
      }
    ],
    "id": "CVE-2026-64058",
    "lastModified": "2026-09-14T12:17:44.067",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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          "type": "Secondary"
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    "published": "2026-07-19T16:17:46.290",
    "references": [
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        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      },
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "tags": [
          "Patch"
        ],
        "url": "https://git.kernel.org/stable/c/b8271cccdd5e43cc8d738afb8b51f6ad05b1cb4b"
      },
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "tags": [
          "Patch"
        ],
        "url": "https://git.kernel.org/stable/c/ded0c6f1606061148c202825f7e53d711f9f84cf"
      },
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "tags": [
          "Patch"
        ],
        "url": "https://git.kernel.org/stable/c/f17b9121bb99f88188ec9be2db5da1d561f4c01b"
      }
    ],
    "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "vulnStatus": "Modified",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-125"
          }
        ],
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  }
}

—

CVSS vector

cvss_vector

not compared

Red Hat

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

receipt

Source: Red Hat
Its words: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Read by: field:cvss3_scoring_vector
Said since: 2026-10-06 13:01 UTC
Last answered: 2026-10-06 13:02 UTC
Original: open at the source

2026-10-06 13:01 UTC	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
2026-09-29 09:44 UTC	—

What the source handed over

{
  "CVE": "CVE-2026-64058",
  "CWE": "CWE-367",
  "advisories": [],
  "affected_packages": [],
  "bugzilla": "2502565",
  "bugzilla_description": "kernel: netfs: Fix netfs_read_folio() to wait on writeback",
  "cvss3_score": "5.5",
  "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "cvss_score": null,
  "cvss_scoring_vector": null,
  "package_state": null,
  "public_date": "2026-07-19T00:00:00Z",
  "resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-64058.json",
  "severity": "moderate"
}

—

CWE

cwe

different words

NVD

CWE-125

receipt

Source: NVD
Its words: CWE-125
Read by: field:cve.weaknesses[].description[].value
Said since: 2026-10-06 12:29 UTC
Last answered: 2026-10-06 12:41 UTC
Original: open at the source

2026-10-06 12:29 UTC	CWE-125
2026-09-29 09:45 UTC	—

What the source handed over

{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "defaultStatus": "unaffected",
            "product": "Linux",
            "programFiles": [
              "fs/netfs/buffered_read.c"
            ],
            "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
            "vendor": "Linux",
            "versions": [
              {
                "lessThan": "090a8aa1894b72f5b3fc18dee68d42ad45f4a2c6",
                "status": "affected",
                "version": "ee4cdf7ba857a894ad1650d6ab77669cbbfa329e",
                "versionType": "git"
              },
              {
                "lessThan": "f17b9121bb99f88188ec9be2db5da1d561f4c01b",
                "status": "affected",
                "version": "ee4cdf7ba857a894ad1650d6ab77669cbbfa329e",
                "versionType": "git"
              },
              {
                "lessThan": "b8271cccdd5e43cc8d738afb8b51f6ad05b1cb4b",
                "status": "affected",
                "version": "ee4cdf7ba857a894ad1650d6ab77669cbbfa329e",
                "versionType": "git"
              },
              {
                "lessThan": "ded0c6f1606061148c202825f7e53d711f9f84cf",
                "status": "affected",
                "version": "ee4cdf7ba857a894ad1650d6ab77669cbbfa329e",
                "versionType": "git"
              }
            ]
          },
          {
            "defaultStatus": "affected",
            "product": "Linux",
            "programFiles": [
              "fs/netfs/buffered_read.c"
            ],
            "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
            "vendor": "Linux",
            "versions": [
              {
                "status": "affected",
                "version": "6.12"
              },
              {
                "lessThan": "6.12",
                "status": "unaffected",
                "version": "0",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "6.12.*",
                "status": "unaffected",
                "version": "6.12.110",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "6.18.*",
                "status": "unaffected",
                "version": "6.18.34",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "7.0.*",
                "status": "unaffected",
                "version": "7.0.11",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "*",
                "status": "unaffected",
                "version": "7.1",
                "versionType": "original_commit_for_fix"
              }
            ]
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}

—

CWE

cwe

different words

Red Hat

CWE-367

receipt

Source: Red Hat
Its words: CWE-367
Read by: field:CWE
Said since: 2026-09-29 09:44 UTC
Last answered: 2026-10-06 13:02 UTC
Original: open at the source

What the source handed over

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  "package_state": null,
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  "severity": "moderate"
}

—

Product

product

NVD

Linux

receipt

Source: NVD
Its words: Linux
Read by: field:cve.affected[].affectedData[].product
Said since: 2026-09-29 17:49 UTC
Last answered: 2026-10-06 12:41 UTC
Original: open at the source

2026-09-29 17:49 UTC	Linux
2026-09-29 09:45 UTC	—

What the source handed over

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}

—

Severity

severity

conflict

NVD

HIGH

From 7.0 to 8.9.

receipt

Source: NVD
Its words: HIGH
Read by: field:cve.metrics.cvssMetricV31[type=Primary].cvssData.baseSeverity || field:cve.metrics.cvssMetricV31[].cvssData.baseSeverity
Said since: 2026-10-06 12:29 UTC
Last answered: 2026-10-06 12:41 UTC
Original: open at the source

2026-10-06 12:29 UTC	HIGH
2026-09-29 09:45 UTC	—

What the source handed over

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}

high

Severity

severity

conflict

Red Hat

moderate

A flaw that is harder to exploit, or whose impact is limited.

receipt

Source: Red Hat
Its words: moderate
Read by: field:severity
Said since: 2026-09-29 09:44 UTC
Last answered: 2026-10-06 13:02 UTC
Original: open at the source

What the source handed over

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  "CWE": "CWE-367",
  "advisories": [],
  "affected_packages": [],
  "bugzilla": "2502565",
  "bugzilla_description": "kernel: netfs: Fix netfs_read_folio() to wait on writeback",
  "cvss3_score": "5.5",
  "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "cvss_score": null,
  "cvss_scoring_vector": null,
  "package_state": null,
  "public_date": "2026-07-19T00:00:00Z",
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  "severity": "moderate"
}

medium

Status

status

NVD

Modified

receipt

Source: NVD
Its words: Modified
Read by: field:cve.vulnStatus
Said since: 2026-09-29 09:45 UTC
Last answered: 2026-10-06 12:41 UTC
Original: open at the source

What the source handed over

{
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}

—

Vendor

vendor

NVD

Linux

receipt

Source: NVD
Its words: Linux
Read by: field:cve.affected[].affectedData[].vendor
Said since: 2026-09-29 17:49 UTC
Last answered: 2026-10-06 12:41 UTC
Original: open at the source

2026-09-29 17:49 UTC	Linux
2026-09-29 09:45 UTC	—

What the source handed over

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}

—

Every claim, by kind

vulnerability

kernel: netfs: Fix netfs_read_folio() to wait on writeback zetlyn/cve-redhat · 2026-07-19	cvss 5.5 cvss_vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H cwe CWE-367 severity moderate	source
In the Linux kernel, the following vulnerability has been resolved: netfs: Fix netfs_read_folio() to wait on writeback Fix netfs_read_folio() to wait for an ongoing writeback to complete so that it can trust the dirty flag and whatever is attached to folio->private (folio->private may get cleaned up by the collector before it clears the writeback flag). zetlyn/cve-nvd · 2026-07-19	cvss 7.8 cvss_vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H cwe CWE-125 product Linux severity HIGH status Modified vendor Linux	source