CVE-2025-71295

MEDIUM EPSS 2.4%
Published May 6, 20261mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published May 6, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago

Description

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.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
2.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 5

VendorProductVersionRange
linuxlinux_kernel*≥6.1.72  –  <6.1.165
linuxlinux_kernel*≥6.2  –  <6.6.128
linuxlinux_kernel*≥6.7  –  <6.12.75
linuxlinux_kernel*≥6.13  –  <6.18.16
linuxlinux_kernel*≥6.19  –  <6.19.6

References 6

  • git.kernel.org https://git.kernel.org/stable/c/1b111a69a6e33a922622bf9870e4e63fb2b649c8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/42c32d7571ccd8ef32351cac506f00b0fae99fd2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/727e5140e0cf83b4ce6a11b89bb73bff5d96f8f3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b68f91ef3b3fe82ad78c417de71b675699a8467c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c1b6227555c52781178132b7a06466711855795c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c6246ca15999053d2632fbcc7b86e6eef7f077cb
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/1b111a69a6e33a922622bf9870e4e63fb2b649c8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/42c32d7571ccd8ef32351cac506f00b0fae99fd2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/727e5140e0cf83b4ce6a11b89bb73bff5d96f8f3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b68f91ef3b3fe82ad78c417de71b675699a8467c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c1b6227555c52781178132b7a06466711855795c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c6246ca15999053d2632fbcc7b86e6eef7f077cb
    Patch