CVE-2025-71102

Kernel panic via incorrect shadow-stack range scan

Published Jan 14, 2026 · Updated Jan 14, 2026

Denial of service in affected Linux Kernel releases allows local users to trigger a kernel panic through shadow call stack usage checking. In kernel/scs.c, scs_check_usage passes the task_struct address rather than task_scs(tsk) to __scs_magic, causing its loop to scan the wrong memory range. Reachability requires CONFIG_DEBUG_STACK_USAGE, and the panic path requires the computed range to cross unmapped memory.

CVSS severity5.5
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in affected Linux Kernel releases allows local users to trigger a kernel panic through shadow call stack usage checking. In kernel/scs.c, scs_check_usage passes the task_struct address rather than task_scs(tsk) to __scs_magic, causing its loop to scan the wrong memory range. Reachability requires CONFIG_DEBUG_STACK_USAGE, and the panic path requires the computed range to cross unmapped memory.

The record

CVE
CVE-2025-71102
Published
Jan 14, 2026
Updated
Jan 14, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 14, 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=5.8
  2. Affected versionversion=5bbaf9d1fcb9be696ee9a61636ab6803556c70f2 <062774439d442882b44f5eab8c256ad3423ef284
  3. Affected versionversion=5bbaf9d1fcb9be696ee9a61636ab6803556c70f2 <08bd4c46d5e63b78e77f2605283874bbe868ab19
  4. Affected versionversion=5bbaf9d1fcb9be696ee9a61636ab6803556c70f2 <57ba40b001be27786d0570dd292289df748b306b
  5. Affected versionversion=5bbaf9d1fcb9be696ee9a61636ab6803556c70f2 <9ef28943471a16e4f9646bc3e8e2de148e7d8d7b
  6. Affected versionversion=5bbaf9d1fcb9be696ee9a61636ab6803556c70f2 <a19fb3611e4c06624fc0f83ef19f4fb8d57d4751

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.8; version=5bbaf9d1fcb9be696ee9a61636ab6803556c70f2 <062774439d442882b44f5eab8c256ad3423ef284; version=5bbaf9d1fcb9be696ee9a61636ab6803556c70f2 <08bd4c46d5e63b78e77f2605283874bbe868ab19; version=5bbaf9d1fcb9be696ee9a61636ab6803556c70f2 <57ba40b001be27786d0570dd292289df748b306b; version=5bbaf9d1fcb9be696ee9a61636ab6803556c70f2 <9ef28943471a16e4f9646bc3e8e2de148e7d8d7b; version=5bbaf9d1fcb9be696ee9a61636ab6803556c70f2 <a19fb3611e4c06624fc0f83ef19f4fb8d57d4751

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 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

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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