Vulnerability-Lookup

FKIE_CVE-2025-71295

Vulnerability from fkie_nvd - Published: 2026-05-06 12:16 - Updated: 2026-05-12 21:21

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: fs/buffer: add alert in try_to_free_buffers() for folios without buffers try_to_free_buffers() can be called on folios with no buffers attached when filemap_release_folio() is invoked on a folio belonging to a mapping with AS_RELEASE_ALWAYS set but no release_folio operation defined. In such cases, folio_needs_release() returns true because of the AS_RELEASE_ALWAYS flag, but the folio has no private buffer data. This causes try_to_free_buffers() to call drop_buffers() on a folio with no buffers, leading to a null pointer dereference. Adding a check in try_to_free_buffers() to return early if the folio has no buffers attached, with WARN_ON_ONCE() to alert about the misconfiguration. This provides defensive hardening.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1b111a69a6e33a922622bf9870e4e63fb2b649c8	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/42c32d7571ccd8ef32351cac506f00b0fae99fd2	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/727e5140e0cf83b4ce6a11b89bb73bff5d96f8f3	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b68f91ef3b3fe82ad78c417de71b675699a8467c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c1b6227555c52781178132b7a06466711855795c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c6246ca15999053d2632fbcc7b86e6eef7f077cb	Patch

Impacted products

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

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              "vulnerable": true
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/buffer: add alert in try_to_free_buffers() for folios without buffers\n\ntry_to_free_buffers() can be called on folios with no buffers attached\nwhen filemap_release_folio() is invoked on a folio belonging to a mapping\nwith AS_RELEASE_ALWAYS set but no release_folio operation defined.\n\nIn such cases, folio_needs_release() returns true because of the\nAS_RELEASE_ALWAYS flag, but the folio has no private buffer data. This\ncauses try_to_free_buffers() to call drop_buffers() on a folio with no\nbuffers, leading to a null pointer dereference.\n\nAdding a check in try_to_free_buffers() to return early if the folio has no\nbuffers attached, with WARN_ON_ONCE() to alert about the misconfiguration.\nThis provides defensive hardening."
    }
  ],
  "id": "CVE-2025-71295",
  "lastModified": "2026-05-12T21:21:32.197",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "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"
      }
    ]
  },
  "published": "2026-05-06T12:16:28.820",
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      "tags": [
        "Patch"
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-476"
        }
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      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2025-71295 (GCVE-0-2025-71295)

Vulnerability from cvelistv5 – Published: 2026-05-06 11:32 – Updated: 2026-05-11 21:57

Title

fs/buffer: add alert in try_to_free_buffers() for folios without buffers

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

6 references

URL	Tags
https://git.kernel.org/stable/c/1b111a69a6e33a922…
https://git.kernel.org/stable/c/c1b6227555c527811…
https://git.kernel.org/stable/c/727e5140e0cf83b4c…
https://git.kernel.org/stable/c/42c32d7571ccd8ef3…
https://git.kernel.org/stable/c/c6246ca15999053d2…
https://git.kernel.org/stable/c/b68f91ef3b3fe82ad…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: d0eafc763135508be118dac208887a26c0adb74d , < 1b111a69a6e33a922622bf9870e4e63fb2b649c8 (git) Affected: b4fa966f03b7401ceacd4ffd7227197afb2b8376 , < c1b6227555c52781178132b7a06466711855795c (git) Affected: b4fa966f03b7401ceacd4ffd7227197afb2b8376 , < 727e5140e0cf83b4ce6a11b89bb73bff5d96f8f3 (git) Affected: b4fa966f03b7401ceacd4ffd7227197afb2b8376 , < 42c32d7571ccd8ef32351cac506f00b0fae99fd2 (git) Affected: b4fa966f03b7401ceacd4ffd7227197afb2b8376 , < c6246ca15999053d2632fbcc7b86e6eef7f077cb (git) Affected: b4fa966f03b7401ceacd4ffd7227197afb2b8376 , < b68f91ef3b3fe82ad78c417de71b675699a8467c (git)
Linux	Linux	Affected: 6.6 Unaffected: 0 , < 6.6 (semver) Unaffected: 6.1.165 , ≤ 6.1.* (semver) Unaffected: 6.6.128 , ≤ 6.6.* (semver) Unaffected: 6.12.75 , ≤ 6.12.* (semver) Unaffected: 6.18.16 , ≤ 6.18.* (semver) Unaffected: 6.19.6 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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          "programFiles": [
            "fs/buffer.c"
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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.

Action not permitted

FKIE_CVE-2025-71295

CVE-2025-71295 (GCVE-0-2025-71295)

Tags

Sightings

Nomenclature