CVE-2023-53551

Local system crash via USB serial resume race

Published Oct 4, 2025 · Updated Oct 4, 2025

NULL pointer dereference in the Linux kernel USB serial gadget driver allows local users to crash the system during resume. gserial_disconnect can clear gser->ioport before gserial_resume dereferences it after a wakeup interrupt because the check and pointer access are not synchronized. Reachability requires local low-privileged access and the USB serial gadget path; the bounded consequence is loss of system availability.

CVSS severity5.5
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux kernel USB serial gadget driver allows local users to crash the system during resume. gserial_disconnect can clear gser->ioport before gserial_resume dereferences it after a wakeup interrupt because the check and pointer access are not synchronized. Reachability requires local low-privileged access and the USB serial gadget path; the bounded consequence is loss of system availability.

The record

CVE
CVE-2023-53551
Published
Oct 4, 2025
Updated
Oct 4, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 4, 2025Record 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=5.8
  2. Affected versionversion=aba3a8d01d623a5efef48ab8e78752d58d4c90c3 <3b24c980dc07be4550a9d1450ed7057f882530e5
  3. Affected versionversion=aba3a8d01d623a5efef48ab8e78752d58d4c90c3 <44e004f757a7ae13dfebaadbcfdb1a6f98c10377
  4. Affected versionversion=aba3a8d01d623a5efef48ab8e78752d58d4c90c3 <5ec63fdbca604568890c577753c6f66c5b3ef0b5
  5. Affected versionversion=aba3a8d01d623a5efef48ab8e78752d58d4c90c3 <c5360eec648bd506afa304ae4a71f82e13d41897
  6. Affected versionversion=aba3a8d01d623a5efef48ab8e78752d58d4c90c3 <ec357cd3e8af614855d286dd378725cdc7264df6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.8; version=aba3a8d01d623a5efef48ab8e78752d58d4c90c3 <3b24c980dc07be4550a9d1450ed7057f882530e5; version=aba3a8d01d623a5efef48ab8e78752d58d4c90c3 <44e004f757a7ae13dfebaadbcfdb1a6f98c10377; version=aba3a8d01d623a5efef48ab8e78752d58d4c90c3 <5ec63fdbca604568890c577753c6f66c5b3ef0b5; version=aba3a8d01d623a5efef48ab8e78752d58d4c90c3 <c5360eec648bd506afa304ae4a71f82e13d41897; version=aba3a8d01d623a5efef48ab8e78752d58d4c90c3 <ec357cd3e8af614855d286dd378725cdc7264df6

Published CVSS scores

5.5NIST NVDCVSS: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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
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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