Vulnerability-Lookup

FKIE_CVE-2026-64156

Vulnerability from fkie_nvd - Published: 2026-07-19 16:17 - Updated: 2026-08-13 15:12

Severity

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

Summary

In the Linux kernel, the following vulnerability has been resolved: netfs, afs: Fix write skipping in dir/link writepages Fix netfs_write_single() and afs_single_writepages() to better handle a write that would be skipped due to lock contention and WB_SYNC_NONE by returning 1 from netfs_write_single() if it skipped and making afs_single_writepages() skip also. If a skip occurs, the inode must be re-marked as the VFS may have cleared the mark. This is really only theoretical for directories in netfs_write_single() as the only path to that is through afs_single_writepages() that takes the ->validate_lock around it, thereby serialising it.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/77bb293049d61e04c12b24ebbffafaf5ab36af90	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9871938f99cc6cb266a77265491660e2375271f5	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f91e10435c0dd37c48b1b25e6236284f656ddc0c	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/afs/dir.c",
            "fs/netfs/write_issue.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "77bb293049d61e04c12b24ebbffafaf5ab36af90",
              "status": "affected",
              "version": "6dd80936618c4ff852d4db73aca400351d9bd9f0",
              "versionType": "git"
            },
            {
              "lessThan": "f91e10435c0dd37c48b1b25e6236284f656ddc0c",
              "status": "affected",
              "version": "6dd80936618c4ff852d4db73aca400351d9bd9f0",
              "versionType": "git"
            },
            {
              "lessThan": "9871938f99cc6cb266a77265491660e2375271f5",
              "status": "affected",
              "version": "6dd80936618c4ff852d4db73aca400351d9bd9f0",
              "versionType": "git"
            }
          ]
        },
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          "product": "Linux",
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.14"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "6.18.34",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "7.0.11",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
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    }
  ],
  "configurations": [
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    }
  ],
  "id": "CVE-2026-64156",
  "lastModified": "2026-08-13T15:12:39.070",
  "metrics": {
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          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2026-07-19T16:17:57.603",
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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  "vulnStatus": "Analyzed",
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        {
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          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2026-64156 (GCVE-0-2026-64156)

Vulnerability from cvelistv5 – Published: 2026-07-19 15:40 – Updated: 2026-07-19 15:40

Title

netfs, afs: Fix write skipping in dir/link writepages

Summary

Severity

No CVSS data available.

Assigner

Linux

References

3 references

URL	Tags
https://git.kernel.org/stable/c/77bb293049d61e04c…
https://git.kernel.org/stable/c/f91e10435c0dd37c4…
https://git.kernel.org/stable/c/9871938f99cc6cb26…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 6dd80936618c4ff852d4db73aca400351d9bd9f0 , < 77bb293049d61e04c12b24ebbffafaf5ab36af90 (git) Affected: 6dd80936618c4ff852d4db73aca400351d9bd9f0 , < f91e10435c0dd37c48b1b25e6236284f656ddc0c (git) Affected: 6dd80936618c4ff852d4db73aca400351d9bd9f0 , < 9871938f99cc6cb266a77265491660e2375271f5 (git)
Linux	Linux	Affected: 6.14 Unaffected: 0 , < 6.14 (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

{
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/afs/dir.c",
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          ],
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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.

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FKIE_CVE-2026-64156

CVE-2026-64156 (GCVE-0-2026-64156)

Tags

Sightings

Nomenclature