CVE-2025-68361

Kernel crash via unbounded file-backed mount stacking

Published Dec 24, 2025 · Updated Dec 24, 2025

Stack exhaustion in EROFS file-backed mounts in Linux allows local users to crash the kernel through recursive filesystem stacking. The mount setup path in fs/erofs/super.c accepts a file-backed EROFS instance over an already stacked filesystem without rejecting its nonzero stack depth. Repeated nesting can exhaust the kernel stack; exploitation requires local low-privileged access and the ability to create the mount configuration.

CVSS severity6.8
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Stack exhaustion in EROFS file-backed mounts in Linux allows local users to crash the kernel through recursive filesystem stacking. The mount setup path in fs/erofs/super.c accepts a file-backed EROFS instance over an already stacked filesystem without rejecting its nonzero stack depth. Repeated nesting can exhaust the kernel stack; exploitation requires local low-privileged access and the ability to create the mount configuration.

The record

CVE
CVE-2025-68361
Published
Dec 24, 2025
Updated
Dec 24, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 24, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=6.12
  2. Affected versionversion=fb176750266a3d7f42ebdcf28e8ba40350b27847 <34447aeedbaea8f9aad3da5b07030a1c0e124639
  3. Affected versionversion=fb176750266a3d7f42ebdcf28e8ba40350b27847 <620472e6b303c4dbcc7ecf1aba1cda4f3523e4a4
  4. Affected versionversion=fb176750266a3d7f42ebdcf28e8ba40350b27847 <b4911825348a494e894e6ccfcf88d99e9425f129
  5. Affected versionversion=fb176750266a3d7f42ebdcf28e8ba40350b27847 <d53cd891f0e4311889349fff3a784dc552f814b9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.12; version=fb176750266a3d7f42ebdcf28e8ba40350b27847 <34447aeedbaea8f9aad3da5b07030a1c0e124639; version=fb176750266a3d7f42ebdcf28e8ba40350b27847 <620472e6b303c4dbcc7ecf1aba1cda4f3523e4a4; version=fb176750266a3d7f42ebdcf28e8ba40350b27847 <b4911825348a494e894e6ccfcf88d99e9425f129; version=fb176750266a3d7f42ebdcf28e8ba40350b27847 <d53cd891f0e4311889349fff3a784dc552f814b9

Published CVSS scores

7.0Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo