CVE-2026-80594

Driver hang via zero-length USB descriptor

Published Aug 28, 2026 · Updated Aug 28, 2026

Infinite-loop denial of service in the ims-pcu driver in Linux allows physically proximate attackers to hang the driver via a USB device. The ims_pcu_get_cdc_union_desc() parser advances by each descriptor's bLength without rejecting values below 2, so a zero value prevents progress. Exploitation requires attaching a malicious USB device exposing the ims-pcu interface; the loop interrupts descriptor parsing and consumes the executing context indefinitely.

CVSS severityUnavailable
Unscored
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

Infinite-loop denial of service in the ims-pcu driver in Linux allows physically proximate attackers to hang the driver via a USB device. The ims_pcu_get_cdc_union_desc() parser advances by each descriptor's bLength without rejecting values below 2, so a zero value prevents progress. Exploitation requires attaching a malicious USB device exposing the ims-pcu interface; the loop interrupts descriptor parsing and consumes the executing context indefinitely.

The record

CVE
CVE-2026-80594
Published
Aug 28, 2026
Updated
Aug 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 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=3.10
  2. Affected versionversion=628329d52474323938a03826941e166bc7c8eff4 <383934c249a9817d242d02d30bfbc8defbf0d533
  3. Affected versionversion=628329d52474323938a03826941e166bc7c8eff4 <6314bd9e2a6b3362998dc85485dd4b0f133a3532
  4. Affected versionversion=628329d52474323938a03826941e166bc7c8eff4 <67a038c5a7c9bd8aabe6fba8ac9d2e31c0bd5a28
  5. Affected versionversion=628329d52474323938a03826941e166bc7c8eff4 <76eeeb3a8e3c13d5c0ef28666b57dcb5cc101a32
  6. Affected versionversion=628329d52474323938a03826941e166bc7c8eff4 <b847f2725ef47a26b3d01eca3d54fd811e5a544d
  7. Affected versionversion=628329d52474323938a03826941e166bc7c8eff4 <bbbe31486cf2d12177462e4a814244c2597c9849
  8. Affected versionversion=628329d52474323938a03826941e166bc7c8eff4 <d4579af29e67ca8722db0a1194227f8015c8981d
  9. Affected versionversion=628329d52474323938a03826941e166bc7c8eff4 <e3f93d63dcd48c1f0ba9041f2ffa8aea7170e295

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.10; version=628329d52474323938a03826941e166bc7c8eff4 <383934c249a9817d242d02d30bfbc8defbf0d533; version=628329d52474323938a03826941e166bc7c8eff4 <6314bd9e2a6b3362998dc85485dd4b0f133a3532; version=628329d52474323938a03826941e166bc7c8eff4 <67a038c5a7c9bd8aabe6fba8ac9d2e31c0bd5a28; version=628329d52474323938a03826941e166bc7c8eff4 <76eeeb3a8e3c13d5c0ef28666b57dcb5cc101a32; version=628329d52474323938a03826941e166bc7c8eff4 <b847f2725ef47a26b3d01eca3d54fd811e5a544d; version=628329d52474323938a03826941e166bc7c8eff4 <bbbe31486cf2d12177462e4a814244c2597c9849; version=628329d52474323938a03826941e166bc7c8eff4 <d4579af29e67ca8722db0a1194227f8015c8981d; version=628329d52474323938a03826941e166bc7c8eff4 <e3f93d63dcd48c1f0ba9041f2ffa8aea7170e295

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.

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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
Privilegesunauthenticated
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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