CVE-2025-71295

Local system crash via bufferless folio release

Published May 6, 2026 · Updated May 6, 2026

Null pointer dereference in the Linux Kernel allows local users to crash the system during release of a filesystem folio. try_to_free_buffers() passes a folio without private buffer data to drop_buffers() instead of returning before dereferencing the missing buffer state. Reachability requires low-privileged local access and a mapping marked AS_RELEASE_ALWAYS without a release_folio operation; the bounded consequence is system availability loss.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Null pointer dereference in the Linux Kernel allows local users to crash the system during release of a filesystem folio. try_to_free_buffers() passes a folio without private buffer data to drop_buffers() instead of returning before dereferencing the missing buffer state. Reachability requires low-privileged local access and a mapping marked AS_RELEASE_ALWAYS without a release_folio operation; the bounded consequence is system availability loss.

The record

CVE
CVE-2025-71295
Published
May 6, 2026
Updated
May 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 6, 2026CVE publishedPublication date reported by the CVE source.
  2. May 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1b111a69a6e33a922622bf9870e4e63fb2b649c8
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <42c32d7571ccd8ef32351cac506f00b0fae99fd2
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <727e5140e0cf83b4ce6a11b89bb73bff5d96f8f3
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b68f91ef3b3fe82ad78c417de71b675699a8467c
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c1b6227555c52781178132b7a06466711855795c
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c6246ca15999053d2632fbcc7b86e6eef7f077cb

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1b111a69a6e33a922622bf9870e4e63fb2b649c8; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <42c32d7571ccd8ef32351cac506f00b0fae99fd2; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <727e5140e0cf83b4ce6a11b89bb73bff5d96f8f3; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b68f91ef3b3fe82ad78c417de71b675699a8467c; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c1b6227555c52781178132b7a06466711855795c; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c6246ca15999053d2632fbcc7b86e6eef7f077cb

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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