CVE-2023-52457

Local use-after-free via skipped UART cleanup

Published Feb 23, 2024 · Updated May 23, 2026

Use-after-free in the Linux 8250 OMAP UART driver in affected kernel releases allows local users to cause unspecified impact during device removal. The driver remove callback returns immediately when pm_runtime_resume_and_get() fails, skipping serial8250_unregister_port() and other cleanup while the core still removes the device. Reachability requires an OMAP UART using this driver, a device-removal path, and a runtime-resume failure; published evidence establishes leaked resources and a potential dangling UART object but no demonstrated exploit outcome.

CVSS severity7.8
High
EPSS probability0.23%
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 8250 OMAP UART driver in affected kernel releases allows local users to cause unspecified impact during device removal. The driver remove callback returns immediately when pm_runtime_resume_and_get() fails, skipping serial8250_unregister_port() and other cleanup while the core still removes the device. Reachability requires an OMAP UART using this driver, a device-removal path, and a runtime-resume failure; published evidence establishes leaked resources and a potential dangling UART object but no demonstrated exploit outcome.

The record

CVE
CVE-2023-52457
Published
Feb 23, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 23, 2024CVE publishedPublication date reported by the CVE source.
  2. May 23, 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=02eed6390dbe61115f3e3f63829c95c611aee67b
  2. Affected versionversion=2d66412563ef8953e2bac2d98d2d832b3f3f49cd <b502fb43f7fb55aaf07f6092ab44657595214b93
  3. Affected versionversion=5.10.156 <5.10.209
  4. Affected versionversion=5.15.80 <5.15.148
  5. Affected versionversion=5.4.225 <5.4.268
  6. Affected versionversion=6.0.10 <6.1
  7. Affected versionversion=6.1
  8. Affected versionversion=d833cba201adf9237168e19f0d76e4d7aa69f303 <bc57f3ef8a9eb0180606696f586a6dcfaa175ed0
  9. Affected versionversion=e0db709a58bdeb8966890882261a3f8438c5c9b7 <828cd829483f0cda920710997aed79130b0af690
  10. Affected versionversion=e3f0c638f428fd66b5871154b62706772045f91a <887a558d0298d36297daea039954c39940228d9b
  11. Affected versionversion=e3f0c638f428fd66b5871154b62706772045f91a <95e4e0031effad9837af557ecbfd4294a4d8aeee
  12. Affected versionversion=e3f0c638f428fd66b5871154b62706772045f91a <ad90d0358bd3b4554f243a425168fc7cebe7d04e
  13. Affected versionversion=e3f0c638f428fd66b5871154b62706772045f91a <d74173bda29aba58f822175d983d07c8ed335494

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=02eed6390dbe61115f3e3f63829c95c611aee67b; version=2d66412563ef8953e2bac2d98d2d832b3f3f49cd <b502fb43f7fb55aaf07f6092ab44657595214b93; version=5.10.156 <5.10.209; version=5.15.80 <5.15.148; version=5.4.225 <5.4.268; version=6.0.10 <6.1; version=6.1; version=d833cba201adf9237168e19f0d76e4d7aa69f303 <bc57f3ef8a9eb0180606696f586a6dcfaa175ed0; version=e0db709a58bdeb8966890882261a3f8438c5c9b7 <828cd829483f0cda920710997aed79130b0af690; version=e3f0c638f428fd66b5871154b62706772045f91a <887a558d0298d36297daea039954c39940228d9b; version=e3f0c638f428fd66b5871154b62706772045f91a <95e4e0031effad9837af557ecbfd4294a4d8aeee; version=e3f0c638f428fd66b5871154b62706772045f91a <ad90d0358bd3b4554f243a425168fc7cebe7d04e; version=e3f0c638f428fd66b5871154b62706772045f91a <d74173bda29aba58f822175d983d07c8ed335494

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8Canonical UbuntuCVSS: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

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-416Use After Free

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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