Vulnerability-Lookup

FKIE_CVE-2026-64058

Vulnerability from fkie_nvd - Published: 2026-07-19 16:17 - Updated: 2026-09-14 12:17

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

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).

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/090a8aa1894b72f5b3fc18dee68d42ad45f4a2c6
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b8271cccdd5e43cc8d738afb8b51f6ad05b1cb4b	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ded0c6f1606061148c202825f7e53d711f9f84cf	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f17b9121bb99f88188ec9be2db5da1d561f4c01b	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	7.1

JSON

To clipboard

{
  "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",
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            },
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              "status": "affected",
              "version": "ee4cdf7ba857a894ad1650d6ab77669cbbfa329e",
              "versionType": "git"
            },
            {
              "lessThan": "b8271cccdd5e43cc8d738afb8b51f6ad05b1cb4b",
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            },
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          ]
        },
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          ],
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.12"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
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              "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:*:*:*:*:*:*:*:*",
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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-\u003eprivate\n(folio-\u003eprivate 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",
          "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": [
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    },
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      "tags": [
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      "url": "https://git.kernel.org/stable/c/ded0c6f1606061148c202825f7e53d711f9f84cf"
    },
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      "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"
    }
  ]
}

CVE-2026-64058 (GCVE-0-2026-64058)

Vulnerability from cvelistv5 – Published: 2026-07-19 15:39 – Updated: 2026-09-14 11:58

Title

netfs: Fix netfs_read_folio() to wait on writeback

Summary

Severity

7.8 (High)


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

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/090a8aa1894b72f5b…
https://git.kernel.org/stable/c/f17b9121bb99f8818…
https://git.kernel.org/stable/c/b8271cccdd5e43cc8…
https://git.kernel.org/stable/c/ded0c6f1606061148…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: ee4cdf7ba857a894ad1650d6ab77669cbbfa329e , < 090a8aa1894b72f5b3fc18dee68d42ad45f4a2c6 (git) Affected: ee4cdf7ba857a894ad1650d6ab77669cbbfa329e , < f17b9121bb99f88188ec9be2db5da1d561f4c01b (git) Affected: ee4cdf7ba857a894ad1650d6ab77669cbbfa329e , < b8271cccdd5e43cc8d738afb8b51f6ad05b1cb4b (git) Affected: ee4cdf7ba857a894ad1650d6ab77669cbbfa329e , < ded0c6f1606061148c202825f7e53d711f9f84cf (git)
Linux	Linux	Affected: 6.12 Unaffected: 0 , < 6.12 (semver) Unaffected: 6.12.110 , ≤ 6.12.* (semver) Unaffected: 6.18.34 , ≤ 6.18.* (semver) Unaffected: 7.0.11 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "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": [
            {
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            },
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              "versionType": "git"
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          ]
        },
        {
          "defaultStatus": "affected",
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          ],
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          "vendor": "Linux",
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              "versionType": "semver"
            },
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            {
              "lang": "en",
              "value": "AV:L - The bug is in the netfs client page-cache path (`netfs_read_folio()`), reached only through local VFS operations (read/mmap/page fault) on mounted network filesystems (CIFS, Ceph, AFS, 9p, NFS+fscache), not from remote packet handling.\nAC:L - An attacker can reliably trigger the race by concurrently performing streaming writes and reads on the same folio from threads they control, forcing writeback while reads hit the vulnerable dirty-folio path.\nPR:L - Exploitation requires only unprivileged access to read/write files on an already-mounted netfs-backed filesystem; no CAP_SYS_ADMIN, real root, or user-namespace capability is needed.\nUI:N - No victim interaction is required beyond the attacker (or any local process with file access) issuing the concurrent read/write operations that trigger the race.\nS:U - The vulnerability corrupts kernel heap memory during local filesystem I/O in the same kernel security domain; it does not inherently cross VM, container, or IOMMU boundaries.\nC:H - The race frees `struct netfs_folio` in `folio-\u003eprivate` before writeback completes, creating a use-after-free that can expose or leak kernel heap contents when `netfs_read_gaps()` dereferences stale metadata.\nI:H - UAF on the kmalloc\u0027d `netfs_folio` object can be leveraged for heap manipulation; corrupted `dirty_offset`/`dirty_len` values drive subsequent I/O vector setup and pagecache writes in `netfs_read_gaps()`.\nA:H - Winning the race causes kernel oops/panic via NULL dereference or use-after-free during `netfs_read_gaps()`, and a malicious local user can repeat the trigger to deny availability on shared servers with CIFS/NFS/Ceph mounts."
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    "datePublished": "2026-07-19T15:39:38.978Z",
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    "dateUpdated": "2026-09-14T11:58:36.477Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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FKIE_CVE-2026-64058

CVE-2026-64058 (GCVE-0-2026-64058)

Tags

Sightings

Nomenclature

Related by attack behaviour