CVE-2023-53417

Denial of service via unreleased debugfs dentry

Published Sep 18, 2025 · Updated Sep 18, 2025

Memory leak in Linux's SL811 USB host driver allows local users to exhaust kernel memory by repeatedly triggering driver teardown. The removal path calls debugfs_lookup() but neither calls dput() on the returned dentry nor otherwise releases that reference. Local users must repeatedly reach SL811 teardown on a kernel built with the driver; accumulated references can interrupt system service through memory exhaustion.

CVSS severity5.5
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in Linux's SL811 USB host driver allows local users to exhaust kernel memory by repeatedly triggering driver teardown. The removal path calls debugfs_lookup() but neither calls dput() on the returned dentry nor otherwise releases that reference. Local users must repeatedly reach SL811 teardown on a kernel built with the driver; accumulated references can interrupt system service through memory exhaustion.

The record

CVE
CVE-2023-53417
Published
Sep 18, 2025
Updated
Sep 18, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <04fdfec7b0286972cb5457ef958c92585447a39f
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <54166af8941d0cf46b65cfa2fbce76e38d82fadf
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bb4d5eefb67095d7c3b70b08498b23b7f2895f76
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e1523c4dbc54e164638ff8729d511cf91e27be04

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <04fdfec7b0286972cb5457ef958c92585447a39f; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <54166af8941d0cf46b65cfa2fbce76e38d82fadf; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bb4d5eefb67095d7c3b70b08498b23b7f2895f76; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e1523c4dbc54e164638ff8729d511cf91e27be04

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-401Missing Release of Memory after Effective Lifetime
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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