CVE-2026-31494

Local kernel memory corruption via oversized stats copy

Published Apr 22, 2026 · Updated Apr 22, 2026

Out-of-bounds write in the Linux kernel macb driver allows local users to corrupt kernel memory through an ethtool statistics request. gem_get_ethtool_stats copies statistics for MACB_MAX_QUEUES into a buffer sized by gem_get_sset_count for only the active queues. The flaw requires low-privileged local access and a macb device with fewer active queues than MACB_MAX_QUEUES; the overwrite corrupts kernel memory.

CVSS severity7.8
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Out-of-bounds write in the Linux kernel macb driver allows local users to corrupt kernel memory through an ethtool statistics request. gem_get_ethtool_stats copies statistics for MACB_MAX_QUEUES into a buffer sized by gem_get_sset_count for only the active queues. The flaw requires low-privileged local access and a macb device with fewer active queues than MACB_MAX_QUEUES; the overwrite corrupts kernel memory.

The record

CVE
CVE-2026-31494
Published
Apr 22, 2026
Updated
Apr 22, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-787, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 22, 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=4.16
  2. Affected versionversion=512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd <240c5302eed83e34e98db18f6795ee5f40814024
  3. Affected versionversion=512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd <72d96e4e24bbefdcfbc68bdb9341a05d8f5cb6e5
  4. Affected versionversion=512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd <7ff87da099210856cbfe2f2f7f52ddfa57af4f0c
  5. Affected versionversion=512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd <95246341945163ad9a250a87ca5bd1c1252777ae
  6. Affected versionversion=512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd <9596759a84e1dbf2670518d85e969208960041f9
  7. Affected versionversion=512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd <9738be665544281aa624842812c2fbfed6f88226
  8. Affected versionversion=512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd <9d74d10e4e26672e139a8bcf8bf95957bf2d160f
  9. Affected versionversion=512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd <e182fe273cdf5a8931592228196ef514ffac392b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4.16; version=512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd <240c5302eed83e34e98db18f6795ee5f40814024; version=512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd <72d96e4e24bbefdcfbc68bdb9341a05d8f5cb6e5; version=512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd <7ff87da099210856cbfe2f2f7f52ddfa57af4f0c; version=512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd <95246341945163ad9a250a87ca5bd1c1252777ae; version=512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd <9596759a84e1dbf2670518d85e969208960041f9; version=512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd <9738be665544281aa624842812c2fbfed6f88226; version=512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd <9d74d10e4e26672e139a8bcf8bf95957bf2d160f; version=512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd <e182fe273cdf5a8931592228196ef514ffac392b

Published CVSS scores

7.8Linux kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1068Exploitation for Privilege Escalation

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo