CVE-2026-53384Network attack vector

Kernel code execution via stale serial callbacks

Published Jul 19, 2026 · Updated Jul 19, 2026

Use-after-free in the Linux Kernel 8250_dw serial driver allows attackers to crash the kernel or execute code through an orphaned port. dw8250_probe() returns after clock-notifier registration fails without unregistering the 8250 port, leaving callbacks and private_data references to freed driver state. The stale port must first survive that probe failure; subsequent serial I/O, console output, or interrupt handling dereferences the freed state.

CVSS severity9.8
Critical
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux Kernel 8250_dw serial driver allows attackers to crash the kernel or execute code through an orphaned port. dw8250_probe() returns after clock-notifier registration fails without unregistering the 8250 port, leaving callbacks and private_data references to freed driver state. The stale port must first survive that probe failure; subsequent serial I/O, console output, or interrupt handling dereferences the freed state.

The record

CVE
CVE-2026-53384
Published
Jul 19, 2026
Updated
Jul 19, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416, CWE-825
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 19, 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=5.9
  2. Affected versionversion=cc816969d7b5973d2720d9afd381f06f0eac6885 <07ffe414a708ae60551401cec5d727ed156b8caf
  3. Affected versionversion=cc816969d7b5973d2720d9afd381f06f0eac6885 <10fc708b4de7f86002d2d735a2dbf3b5b7f65692
  4. Affected versionversion=cc816969d7b5973d2720d9afd381f06f0eac6885 <3d205fe80f2181f0109150ad1fa06ee5bc046935
  5. Affected versionversion=cc816969d7b5973d2720d9afd381f06f0eac6885 <511d2b92f8d20de04acafab676150d26fb5c67f4
  6. Affected versionversion=cc816969d7b5973d2720d9afd381f06f0eac6885 <778b9dda4b24005a27bcd9c35c110bf8d7f259ca
  7. Affected versionversion=cc816969d7b5973d2720d9afd381f06f0eac6885 <ccdf4510a3873b14e5e348cdb038717996f09fda
  8. Affected versionversion=cc816969d7b5973d2720d9afd381f06f0eac6885 <d72650a4f334581b23a1892b888a4cb1be142f76

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.9; version=cc816969d7b5973d2720d9afd381f06f0eac6885 <07ffe414a708ae60551401cec5d727ed156b8caf; version=cc816969d7b5973d2720d9afd381f06f0eac6885 <10fc708b4de7f86002d2d735a2dbf3b5b7f65692; version=cc816969d7b5973d2720d9afd381f06f0eac6885 <3d205fe80f2181f0109150ad1fa06ee5bc046935; version=cc816969d7b5973d2720d9afd381f06f0eac6885 <511d2b92f8d20de04acafab676150d26fb5c67f4; version=cc816969d7b5973d2720d9afd381f06f0eac6885 <778b9dda4b24005a27bcd9c35c110bf8d7f259ca; version=cc816969d7b5973d2720d9afd381f06f0eac6885 <ccdf4510a3873b14e5e348cdb038717996f09fda; version=cc816969d7b5973d2720d9afd381f06f0eac6885 <d72650a4f334581b23a1892b888a4cb1be142f76

Published CVSS scores

9.8kernel.orgCVSS:3.1/AV:N/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
CWE-825Expired Pointer Dereference

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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