CVE-2026-43324

Kernel memory corruption via post-unbind callback race

Published May 8, 2026 · Updated May 8, 2026

Race condition in affected Linux Kernel releases allows local users to access stale gadget-driver state during dummy-hcd unbinding. The flawed order permits new emulated interrupts after the synchronization wait, so a callback can continue after the gadget driver is unbound. Exploitation requires CAP_SYS_ADMIN in the initial user namespace to load dummy_hcd and configure USB gadgets, limiting exposure to privileged local contexts.

CVSS severity7.8
High
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

Race condition in affected Linux Kernel releases allows local users to access stale gadget-driver state during dummy-hcd unbinding. The flawed order permits new emulated interrupts after the synchronization wait, so a callback can continue after the gadget driver is unbound. Exploitation requires CAP_SYS_ADMIN in the initial user namespace to load dummy_hcd and configure USB gadgets, limiting exposure to privileged local contexts.

The record

CVE
CVE-2026-43324
Published
May 8, 2026
Updated
May 8, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
Unavailable
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. May 8, 2026CVE publishedPublication date reported by the CVE source.
  2. May 8, 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=04145a03db9d78469e0817ab3a767c76c0fb0947 <2ca9e46f8f1f5a297eb0ac83f79d35d5b3a02541
  2. Affected versionversion=04145a03db9d78469e0817ab3a767c76c0fb0947 <5687a09776069bd915560021c9728ca528440128
  3. Affected versionversion=04145a03db9d78469e0817ab3a767c76c0fb0947 <5aa776c8615bea3b1eaeec87b0788375800ead4f
  4. Affected versionversion=04145a03db9d78469e0817ab3a767c76c0fb0947 <8bcd80219d8e10e660bf29b20e41bb8beb4e4cb7
  5. Affected versionversion=04145a03db9d78469e0817ab3a767c76c0fb0947 <94d4fab1dd9e64f45449bcc7d6a5acf796b13015
  6. Affected versionversion=04145a03db9d78469e0817ab3a767c76c0fb0947 <cbf7df5e5d27cd5bea92ee9a75a4b28dbcc718d4
  7. Affected versionversion=04145a03db9d78469e0817ab3a767c76c0fb0947 <d847f375b1bcea713143bc02720d13d2d01b012a
  8. Affected versionversion=5.14

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linux Kernelversion=04145a03db9d78469e0817ab3a767c76c0fb0947 <2ca9e46f8f1f5a297eb0ac83f79d35d5b3a02541; version=04145a03db9d78469e0817ab3a767c76c0fb0947 <5687a09776069bd915560021c9728ca528440128; version=04145a03db9d78469e0817ab3a767c76c0fb0947 <5aa776c8615bea3b1eaeec87b0788375800ead4f; version=04145a03db9d78469e0817ab3a767c76c0fb0947 <8bcd80219d8e10e660bf29b20e41bb8beb4e4cb7; version=04145a03db9d78469e0817ab3a767c76c0fb0947 <94d4fab1dd9e64f45449bcc7d6a5acf796b13015; version=04145a03db9d78469e0817ab3a767c76c0fb0947 <cbf7df5e5d27cd5bea92ee9a75a4b28dbcc718d4; version=04145a03db9d78469e0817ab3a767c76c0fb0947 <d847f375b1bcea713143bc02720d13d2d01b012a; version=5.14

Published CVSS scores

7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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