CVE-2026-23290

System crash via unchecked USB endpoints

Published Mar 25, 2026 · Updated Mar 25, 2026

Improper USB endpoint validation in the Linux Kernel pegasus driver allows physically proximate attackers to crash Linux systems with a malicious device. The pegasus_probe path binds without confirming the expected number and types of endpoints, then blindly accesses URBs associated with endpoints that can be absent. Exploitation requires physical USB access and a kernel with the pegasus driver available; success interrupts the affected host by crashing the kernel.

CVSS severity5.5
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper USB endpoint validation in the Linux Kernel pegasus driver allows physically proximate attackers to crash Linux systems with a malicious device. The pegasus_probe path binds without confirming the expected number and types of endpoints, then blindly accesses URBs associated with endpoints that can be absent. Exploitation requires physical USB access and a kernel with the pegasus driver available; success interrupts the affected host by crashing the kernel.

The record

CVE
CVE-2026-23290
Published
Mar 25, 2026
Updated
Mar 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
physical
Privileges
Unavailable

Timeline

How it unfolded

  1. Mar 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 25, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <11de1d3ae5565ed22ef1f89d73d8f2d00322c699
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <43d7c4114b1ec14f41f09306525d3b9382286fc1
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7f8505c7ce3f186ef9d2495f3c0bd6ad6fce999f
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <95556b4e879711693c9865ba0938c148f62d5ea4
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c3f1672eaea68c5cb6e1ec081cdb92045453218f
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ee31ec8cf1eafeefa85ef934ba688d27f88bf0e2
  7. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectorphysical
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <11de1d3ae5565ed22ef1f89d73d8f2d00322c699; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <43d7c4114b1ec14f41f09306525d3b9382286fc1; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7f8505c7ce3f186ef9d2495f3c0bd6ad6fce999f; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <95556b4e879711693c9865ba0938c148f62d5ea4; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c3f1672eaea68c5cb6e1ec081cdb92045453218f; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ee31ec8cf1eafeefa85ef934ba688d27f88bf0e2; version=2.6.12

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5OracleCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5CanonicalCVSS: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.

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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)
Vectorphysical
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

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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