CVE-2026-64565

Kernel control-flow hijack via unchecked USB packet

Published Aug 4, 2026 · Updated Aug 4, 2026

Heap buffer overflow in the Linux kernel ims-pcu driver allows physically proximate attackers to hijack kernel control flow via USB data. ims_pcu_process_data() increments read_pos without checking IMS_PCU_BUF_SIZE, letting oversized URB data corrupt the index before ims_pcu_handle_response() copies into cmd_buf. Exploitation requires a malicious USB device and can corrupt cmd_done.wait.head so complete() follows an attacker-manipulated pointer.

CVSS severity6.8
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

Heap buffer overflow in the Linux kernel ims-pcu driver allows physically proximate attackers to hijack kernel control flow via USB data. ims_pcu_process_data() increments read_pos without checking IMS_PCU_BUF_SIZE, letting oversized URB data corrupt the index before ims_pcu_handle_response() copies into cmd_buf. Exploitation requires a malicious USB device and can corrupt cmd_done.wait.head so complete() follows an attacker-manipulated pointer.

The record

CVE
CVE-2026-64565
Published
Aug 4, 2026
Updated
Aug 4, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1200
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

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 <40bbbf2e91fd60715525bf0405c67876af817edf
  3. Affected versionversion=628329d52474323938a03826941e166bc7c8eff4 <875115b82c295277b81b6dfee7debc725f44e854
  4. Affected versionversion=628329d52474323938a03826941e166bc7c8eff4 <ca9f8c09845fb8c51b6d447f6428eecd1b8b0a49
  5. Affected versionversion=628329d52474323938a03826941e166bc7c8eff4 <d03a740e087de7dcb2a26dc1123377bd3d1d84ca

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.10; version=628329d52474323938a03826941e166bc7c8eff4 <40bbbf2e91fd60715525bf0405c67876af817edf; version=628329d52474323938a03826941e166bc7c8eff4 <875115b82c295277b81b6dfee7debc725f44e854; version=628329d52474323938a03826941e166bc7c8eff4 <ca9f8c09845fb8c51b6d447f6428eecd1b8b0a49; version=628329d52474323938a03826941e166bc7c8eff4 <d03a740e087de7dcb2a26dc1123377bd3d1d84ca

Published CVSS scores

6.8Amazon LinuxCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/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

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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