CVE-2026-31549

Kernel crash via unchecked USB serial string

Published Apr 24, 2026 · Updated Apr 24, 2026

NULL-pointer dereference in the Linux Kernel cp2615 I2C driver allows local users to crash the host kernel through a malicious USB device. During device probe, the driver uses the USB device serial string as the I2C adapter name without first checking that the string exists. Exploitation requires local access to connect a serial-less USB device, and the resulting NULL dereference interrupts the host by crashing its kernel.

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

NULL-pointer dereference in the Linux Kernel cp2615 I2C driver allows local users to crash the host kernel through a malicious USB device. During device probe, the driver uses the USB device serial string as the I2C adapter name without first checking that the string exists. Exploitation requires local access to connect a serial-less USB device, and the resulting NULL dereference interrupts the host by crashing its kernel.

The record

CVE
CVE-2026-31549
Published
Apr 24, 2026
Updated
Apr 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 24, 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=4a7695429eade517b07ea72f9ec366130e81a076 <13ccf9b106bba121728f1625c4375a1bd8f5c5a3
  2. Affected versionversion=4a7695429eade517b07ea72f9ec366130e81a076 <4a22af879172336370ae3e81e7f65fb2f69472ee
  3. Affected versionversion=4a7695429eade517b07ea72f9ec366130e81a076 <69aece634a7eebafd9a596e5494d52facf6f26ec
  4. Affected versionversion=4a7695429eade517b07ea72f9ec366130e81a076 <a9778298f47036866ea15eeb17242e8a4612580f
  5. Affected versionversion=4a7695429eade517b07ea72f9ec366130e81a076 <aa79f996eb41e95aed85a1bd7f56bcd6a3842008
  6. Affected versionversion=4a7695429eade517b07ea72f9ec366130e81a076 <e68c267787778bcdf3d91b06f794faaba7f0d1d1
  7. Affected versionversion=4a7695429eade517b07ea72f9ec366130e81a076 <efe996bcfe50c2dcc6cf65c574285713b722ced7
  8. Affected versionversion=5.13

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4a7695429eade517b07ea72f9ec366130e81a076 <13ccf9b106bba121728f1625c4375a1bd8f5c5a3; version=4a7695429eade517b07ea72f9ec366130e81a076 <4a22af879172336370ae3e81e7f65fb2f69472ee; version=4a7695429eade517b07ea72f9ec366130e81a076 <69aece634a7eebafd9a596e5494d52facf6f26ec; version=4a7695429eade517b07ea72f9ec366130e81a076 <a9778298f47036866ea15eeb17242e8a4612580f; version=4a7695429eade517b07ea72f9ec366130e81a076 <aa79f996eb41e95aed85a1bd7f56bcd6a3842008; version=4a7695429eade517b07ea72f9ec366130e81a076 <e68c267787778bcdf3d91b06f794faaba7f0d1d1; version=4a7695429eade517b07ea72f9ec366130e81a076 <efe996bcfe50c2dcc6cf65c574285713b722ced7; version=5.13

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

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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

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

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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