CVE-2025-71137

Local kernel crash via undersized RX ring

Published Jan 14, 2026 · Updated Jan 14, 2026

Integer validation flaw in affected Linux Kernel releases allows local users to trigger kernel warnings or crashes via ethtool -G. The otx2_set_ringparam function passes an RX ring size below 16 into Q_SIZE, whose shift calculation receives an invalid exponent. Reaching the condition requires local privileged control of an octeontx2 interface; Red Hat reports no memory corruption or privilege escalation.

CVSS severity7.8
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer validation flaw in affected Linux Kernel releases allows local users to trigger kernel warnings or crashes via ethtool -G. The otx2_set_ringparam function passes an RX ring size below 16 into Q_SIZE, whose shift calculation receives an invalid exponent. Reaching the condition requires local privileged control of an octeontx2 interface; Red Hat reports no memory corruption or privilege escalation.

The record

CVE
CVE-2025-71137
Published
Jan 14, 2026
Updated
Jan 14, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-190, CWE-787, T1499.004
Attack vector
local
Privileges
admin

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

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=5.6
  2. Affected versionversion=d45d8979840d9c9ac93d3fe8cfc8e794b7228445 <442848e457f5a9f71a4e7e14d24d73dae278ebe3
  3. Affected versionversion=d45d8979840d9c9ac93d3fe8cfc8e794b7228445 <658caf3b8aad65f8b8e102670ca4f68c7030f655
  4. Affected versionversion=d45d8979840d9c9ac93d3fe8cfc8e794b7228445 <85f4b0c650d9f9db10bda8d3acfa1af83bf78cf7
  5. Affected versionversion=d45d8979840d9c9ac93d3fe8cfc8e794b7228445 <aa743b0d98448282b2cb37356db8db2a48524624
  6. Affected versionversion=d45d8979840d9c9ac93d3fe8cfc8e794b7228445 <b23a2e15589466a027c9baa3fb5813c9f6a6c6dc

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.6; version=d45d8979840d9c9ac93d3fe8cfc8e794b7228445 <442848e457f5a9f71a4e7e14d24d73dae278ebe3; version=d45d8979840d9c9ac93d3fe8cfc8e794b7228445 <658caf3b8aad65f8b8e102670ca4f68c7030f655; version=d45d8979840d9c9ac93d3fe8cfc8e794b7228445 <85f4b0c650d9f9db10bda8d3acfa1af83bf78cf7; version=d45d8979840d9c9ac93d3fe8cfc8e794b7228445 <aa743b0d98448282b2cb37356db8db2a48524624; version=d45d8979840d9c9ac93d3fe8cfc8e794b7228445 <b23a2e15589466a027c9baa3fb5813c9f6a6c6dc

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.4Red HatCVSS:3.1/AV:L/AC:L/PR:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
CWE-787Out-of-bounds Write
T1499.004Endpoint Denial of Service: Application 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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