CVE-2025-71121

Local system crash via ASP affinity reprogramming

Published Jan 14, 2026 · Updated Jan 14, 2026

A PA-RISC interrupt-affinity flaw in Linux Kernel on HP 730 workstations allows local users to crash the system with a HPMC. The gsc_set_affinity_irq function writes an affinity value to OFFSET_IAR without excluding ASP silicon version 0x70, whose register is not at the expected location. Reaching the faulty path requires a PA-RISC HP 730 with the ASP chip and an operation that changes IRQ affinity; the result is a system crash, not data access or modification.

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

A PA-RISC interrupt-affinity flaw in Linux Kernel on HP 730 workstations allows local users to crash the system with a HPMC. The gsc_set_affinity_irq function writes an affinity value to OFFSET_IAR without excluding ASP silicon version 0x70, whose register is not at the expected location. Reaching the faulty path requires a PA-RISC HP 730 with the ASP chip and an operation that changes IRQ affinity; the result is a system crash, not data access or modification.

The record

CVE
CVE-2025-71121
Published
Jan 14, 2026
Updated
Jan 14, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4d0858bbeea12a50bfb32137f74d4b74917ebadd
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <60560d13ff368415c96a0c1247bea16d427c0641
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c8f810e20f4bbe50b49f73429d9fa6efad00623e
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <dca7da244349eef4d78527cafc0bf80816b261f5
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e09fd2eb6d4c993ee9eaae556cb51e30ec1042df

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4d0858bbeea12a50bfb32137f74d4b74917ebadd; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <60560d13ff368415c96a0c1247bea16d427c0641; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c8f810e20f4bbe50b49f73429d9fa6efad00623e; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <dca7da244349eef4d78527cafc0bf80816b261f5; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e09fd2eb6d4c993ee9eaae556cb51e30ec1042df

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

T1499Endpoint Denial of Service

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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