CVE-2026-43081

Service interruption via misaligned GENERIC_CMD field masks

Published May 6, 2026 · Updated May 6, 2026

Denial of service in the Linux kernel IPA driver allows local users to trigger a kernel warning during MPSS remoteproc shutdown. The IPA v5.0 register definition assigns GENERIC_CHID and GENERIC_EE to incorrect bit positions and omits GENERIC_PARAMS, producing GENERIC_CMD values that do not match the GSI hardware layout. Local access, IPA v5.0-or-later hardware, and an active IPA path are required; published evidence reports a warning without confidentiality or integrity impact.

CVSS severity5.5
Medium
EPSS probability0.12%
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 the Linux kernel IPA driver allows local users to trigger a kernel warning during MPSS remoteproc shutdown. The IPA v5.0 register definition assigns GENERIC_CHID and GENERIC_EE to incorrect bit positions and omits GENERIC_PARAMS, producing GENERIC_CMD values that do not match the GSI hardware layout. Local access, IPA v5.0-or-later hardware, and an active IPA path are required; published evidence reports a warning without confidentiality or integrity impact.

The record

CVE
CVE-2026-43081
Published
May 6, 2026
Updated
May 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 6, 2026CVE publishedPublication date reported by the CVE source.
  2. May 6, 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=6.4
  2. Affected versionversion=faf0678ec8a0aa9039d8b188d012206abd67dd5c <2aa50d2c1f631b405849da246043c6f683af7489
  3. Affected versionversion=faf0678ec8a0aa9039d8b188d012206abd67dd5c <9709b56d908acc120fe8b4ae250b3c9d749ea832
  4. Affected versionversion=faf0678ec8a0aa9039d8b188d012206abd67dd5c <a7d326dfb13b5a0763eccfd78836fe15199fc499
  5. Affected versionversion=faf0678ec8a0aa9039d8b188d012206abd67dd5c <bafc45ea30d297002750396d5f10e3018bf2cd60
  6. Affected versionversion=faf0678ec8a0aa9039d8b188d012206abd67dd5c <d1c66396796f23f7201b1addf06f62515035354d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.4; version=faf0678ec8a0aa9039d8b188d012206abd67dd5c <2aa50d2c1f631b405849da246043c6f683af7489; version=faf0678ec8a0aa9039d8b188d012206abd67dd5c <9709b56d908acc120fe8b4ae250b3c9d749ea832; version=faf0678ec8a0aa9039d8b188d012206abd67dd5c <a7d326dfb13b5a0763eccfd78836fe15199fc499; version=faf0678ec8a0aa9039d8b188d012206abd67dd5c <bafc45ea30d297002750396d5f10e3018bf2cd60; version=faf0678ec8a0aa9039d8b188d012206abd67dd5c <d1c66396796f23f7201b1addf06f62515035354d

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.

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

T1499.004Application 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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