CVE-2026-31412

Kernel memory corruption via unchecked size shift

Published Apr 10, 2026 · Updated Apr 10, 2026

Integer overflow in Linux Kernel 3.3 and later allows physically proximate attackers to cause out-of-bounds memory access via USB SCSI commands. check_command_size_in_blocks() left-shifts the command-derived block count by the LUN block-size exponent without checking for wraparound, so a truncated byte count passes boundary checks. Exploitation requires the mass-storage gadget function to be enabled and connected to a malicious USB host; resulting kernel-memory corruption can interrupt service.

CVSS severity5.5
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in Linux Kernel 3.3 and later allows physically proximate attackers to cause out-of-bounds memory access via USB SCSI commands. check_command_size_in_blocks() left-shifts the command-derived block count by the LUN block-size exponent without checking for wraparound, so a truncated byte count passes boundary checks. Exploitation requires the mass-storage gadget function to be enabled and connected to a malicious USB host; resulting kernel-memory corruption can interrupt service.

The record

CVE
CVE-2026-31412
Published
Apr 10, 2026
Updated
Apr 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-190
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 10, 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=144974e7f9e32b53b02f6c8632be45d8f43d6ab5 <228b37936376143f4b60cc6828663f6eaceb81b5
  2. Affected versionversion=144974e7f9e32b53b02f6c8632be45d8f43d6ab5 <3428dc5520c811e66622b2f5fa43341bf9a1f8b3
  3. Affected versionversion=144974e7f9e32b53b02f6c8632be45d8f43d6ab5 <387ebb0453b99d71491419a5dc4ab4bee0cacbac
  4. Affected versionversion=144974e7f9e32b53b02f6c8632be45d8f43d6ab5 <8479891d1f04a8ce55366fe4ca361ccdb96f02e1
  5. Affected versionversion=144974e7f9e32b53b02f6c8632be45d8f43d6ab5 <91817ad5452defe69bc7bc0e355f0ed5d01125cc
  6. Affected versionversion=144974e7f9e32b53b02f6c8632be45d8f43d6ab5 <ce0caaed5940162780c5c223b8ae54968a5f059b
  7. Affected versionversion=3.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=144974e7f9e32b53b02f6c8632be45d8f43d6ab5 <228b37936376143f4b60cc6828663f6eaceb81b5; version=144974e7f9e32b53b02f6c8632be45d8f43d6ab5 <3428dc5520c811e66622b2f5fa43341bf9a1f8b3; version=144974e7f9e32b53b02f6c8632be45d8f43d6ab5 <387ebb0453b99d71491419a5dc4ab4bee0cacbac; version=144974e7f9e32b53b02f6c8632be45d8f43d6ab5 <8479891d1f04a8ce55366fe4ca361ccdb96f02e1; version=144974e7f9e32b53b02f6c8632be45d8f43d6ab5 <91817ad5452defe69bc7bc0e355f0ed5d01125cc; version=144974e7f9e32b53b02f6c8632be45d8f43d6ab5 <ce0caaed5940162780c5c223b8ae54968a5f059b; version=3.3

Published CVSS scores

5.5GitHub Advisory DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5UbuntuCVSS: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

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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-190Integer Overflow or Wraparound

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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