CVE-2026-98575Public exploit

Kernel crashes via unchecked USB frame lengths

Published Oct 18, 2026 · Updated Oct 18, 2026

Out-of-bounds reads in Linux's PN533 USB driver allow physically proximate attackers to crash the kernel via crafted USB responses. The pn533_acr122_is_rx_frame_valid() function uses the device-supplied ccid.datalen value to index frame->data without checking its upper bound or rejecting the underflow-producing value 1. Exposure requires the affected ACR122 USB driver path; published testing demonstrates sanitizer-detected crashes, not attacker-visible memory disclosure or code execution.

CVSS severityUnavailable
Unscored
EPSS probability0.21%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds reads in Linux's PN533 USB driver allow physically proximate attackers to crash the kernel via crafted USB responses. The pn533_acr122_is_rx_frame_valid() function uses the device-supplied ccid.datalen value to index frame->data without checking its upper bound or rejecting the underflow-producing value 1. Exposure requires the affected ACR122 USB driver path; published testing demonstrates sanitizer-detected crashes, not attacker-visible memory disclosure or code execution.

The record

CVE
CVE-2026-98575
Published
Oct 18, 2026
Updated
Oct 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
physical
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 18, 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=4.7
  2. Affected versionversion=9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <2450a388367231fb7dd798538f393af227c00c4d
  3. Affected versionversion=9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <72b8b2126e854d6756a1aa4bdc66d7457b832294
  4. Affected versionversion=9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <74b3fbc60907ee97e3af3249091f57351b53a6d6
  5. Affected versionversion=9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <8a0f1bb790d964893db7fc59febda9a534db07b3
  6. Affected versionversion=9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <8db3b1e012a8b25078dfa1efabe3d0cd2916dcba
  7. Affected versionversion=9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <b61732f47316d45f27706db7812950145d3327b5
  8. Affected versionversion=9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <e72cbedc4596e808d22dd2b9fff666ece76f8dd6
  9. Affected versionversion=9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <ea82b7576793219fa10a8b545f8338998b2a9ce2

What conditions does exploitation require?

Attack vectorphysical
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=4.7; version=9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <2450a388367231fb7dd798538f393af227c00c4d; version=9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <72b8b2126e854d6756a1aa4bdc66d7457b832294; version=9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <74b3fbc60907ee97e3af3249091f57351b53a6d6; version=9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <8a0f1bb790d964893db7fc59febda9a534db07b3; version=9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <8db3b1e012a8b25078dfa1efabe3d0cd2916dcba; version=9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <b61732f47316d45f27706db7812950145d3327b5; version=9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <e72cbedc4596e808d22dd2b9fff666ece76f8dd6; version=9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <ea82b7576793219fa10a8b545f8338998b2a9ce2

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

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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