CVE-2026-46128

Service interruption via unchecked BMC response length

Published May 28, 2026 · Updated May 28, 2026

Improper response validation in the Linux Kernel IPMI system interface allows local users to interrupt service via a malformed BMC reply. handle_transaction_done reads msg->rsp[2] before confirming that the response is 19 bytes, so an empty success response from a BMC reaches later processing. Reachability requires the IPMI system-interface driver and a BMC that supplies the malformed event response; the published impact is service interruption.

CVSS severity5.5
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper response validation in the Linux Kernel IPMI system interface allows local users to interrupt service via a malformed BMC reply. handle_transaction_done reads msg->rsp[2] before confirming that the response is 19 bytes, so an empty success response from a BMC reaches later processing. Reachability requires the IPMI system-interface driver and a BMC that supplies the malformed event response; the published impact is service interruption.

The record

CVE
CVE-2026-46128
Published
May 28, 2026
Updated
May 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 28, 2026CVE publishedPublication date reported by the CVE source.
  2. May 28, 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 <2418e4b21fb1355504d095da5d5f0a210564a43d
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <24269264c3d59a49eb09b10af2c75b14f2931482
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <36920f30e78e69df01f9691c470b6f3ba8aebf98
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <42432b579a594b66ac32e5e7b7c26e6bc578ec89
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7f7ada72c07a83b46045ddfeee526bd9e2e3c8f0
  6. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2418e4b21fb1355504d095da5d5f0a210564a43d; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <24269264c3d59a49eb09b10af2c75b14f2931482; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <36920f30e78e69df01f9691c470b6f3ba8aebf98; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <42432b579a594b66ac32e5e7b7c26e6bc578ec89; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7f7ada72c07a83b46045ddfeee526bd9e2e3c8f0; version=2.6.12

Published CVSS scores

5.5NIST National Vulnerability DatabaseCVSS: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

No sourced classifications are available.

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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