CVE-2026-74457

Kernel panic via unchecked USB channel index

Published Aug 15, 2026 · Updated Aug 15, 2026

Out-of-bounds read in the Linux peak_usb driver allows physically proximate attackers to crash the kernel with a crafted USB payload. The pcan_usb_pro_handle_canmsg() and pcan_usb_pro_handle_error() paths mask rx->len to 0–15 and index the two-entry usb_if->dev[] array without rejecting values above 1. The attack requires a crafted USB device to reach the driver; the documented consequence is a kernel panic rather than data disclosure.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in the Linux peak_usb driver allows physically proximate attackers to crash the kernel with a crafted USB payload. The pcan_usb_pro_handle_canmsg() and pcan_usb_pro_handle_error() paths mask rx->len to 0–15 and index the two-entry usb_if->dev[] array without rejecting values above 1. The attack requires a crafted USB device to reach the driver; the documented consequence is a kernel panic rather than data disclosure.

The record

CVE
CVE-2026-74457
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125, CAPEC-540, T1200
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=3.4
  2. Affected versionversion=d8a199355f8f8a0797c00d98788d7282c9ea38bd <0149fdb50a30944827acf9600a2cc44de0325a7f
  3. Affected versionversion=d8a199355f8f8a0797c00d98788d7282c9ea38bd <1acab790b7cecd4e144d1d18bdfe549e282f6b0b
  4. Affected versionversion=d8a199355f8f8a0797c00d98788d7282c9ea38bd <39132f166ca8ce00ae60d8a9068e06a60943cc4b
  5. Affected versionversion=d8a199355f8f8a0797c00d98788d7282c9ea38bd <825c903ca3c98cd0cf0e3de8ab8f2604a5339b3f
  6. Affected versionversion=d8a199355f8f8a0797c00d98788d7282c9ea38bd <f97b7e5e1cdaae15cd95b3a360028c7929664969

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.4; version=d8a199355f8f8a0797c00d98788d7282c9ea38bd <0149fdb50a30944827acf9600a2cc44de0325a7f; version=d8a199355f8f8a0797c00d98788d7282c9ea38bd <1acab790b7cecd4e144d1d18bdfe549e282f6b0b; version=d8a199355f8f8a0797c00d98788d7282c9ea38bd <39132f166ca8ce00ae60d8a9068e06a60943cc4b; version=d8a199355f8f8a0797c00d98788d7282c9ea38bd <825c903ca3c98cd0cf0e3de8ab8f2604a5339b3f; version=d8a199355f8f8a0797c00d98788d7282c9ea38bd <f97b7e5e1cdaae15cd95b3a360028c7929664969

Published CVSS scores

5.5Oracle LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Red HatCVSS: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)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
CAPEC-540Overread Buffers
T1200Hardware Additions

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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