CVE-2026-46109

Local denial of service via ULPI allocation leak

Published May 28, 2026 · Updated May 28, 2026

Memory leak in Linux Kernel ULPI registration allows local users to exhaust kernel memory by triggering pre-registration errors. The ulpi_register path allocates an ulpi object but fails to free it when ulpi_of_register or ulpi_read_id returns an error before device_register runs. Reachability requires the affected ULPI driver and one of those early errors; repeated triggering can deplete memory and interrupt system availability.

CVSS severity5.5
Medium
EPSS probability0.12%
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 Kernel ULPI registration allows local users to exhaust kernel memory by triggering pre-registration errors. The ulpi_register path allocates an ulpi object but fails to free it when ulpi_of_register or ulpi_read_id returns an error before device_register runs. Reachability requires the affected ULPI driver and one of those early errors; repeated triggering can deplete memory and interrupt system availability.

The record

CVE
CVE-2026-46109
Published
May 28, 2026
Updated
May 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-401, T1499.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 28, 2026CVE publishedPublication date reported by the CVE source.
  2. May 28, 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=01af542392b5d41fd659d487015a71f627accce3 <0b9fcab1b8608d429e5f239afb197de928d4de7d
  2. Affected versionversion=01af542392b5d41fd659d487015a71f627accce3 <f30ccfc2985590b33a23a3d8bed7ca16c0af551b
  3. Affected versionversion=272a9b26c336a295e4e209157fed809706c1b1f7
  4. Affected versionversion=2f70ba9dae13a190673cc3f9b4aad52179738f60
  5. Affected versionversion=38c28fe25611099230f0965c925499bfcf46a795 <2a71e01b2cf9b4329ff67102c1bea7448c2a2d2d
  6. Affected versionversion=5.10.253 <5.11
  7. Affected versionversion=5.15.203 <5.16
  8. Affected versionversion=6.1.168 <6.2
  9. Affected versionversion=6.12.81 <6.12.88
  10. Affected versionversion=6.18.22 <6.18.30
  11. Affected versionversion=6.19.12 <6.20
  12. Affected versionversion=6.6.134 <6.6.140
  13. Affected versionversion=7.0
  14. Affected versionversion=8763f8317bb389aded32a32b08f6751cfff657d2 <be2c1d825f54277472c87019e82013ac534ddc4c
  15. Affected versionversion=a6e5461f076c2ef63159f18e5cdbd30b50f0bc15
  16. Affected versionversion=aaeae6533d77e6ed4def85baec01e2815ebbef61 <b0c0d44adb55c66663886cb6e30ee92cbb0f5385
  17. Affected versionversion=ee248e6e941e4f2e634df2bd43e5f1ef810ab6df

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=01af542392b5d41fd659d487015a71f627accce3 <0b9fcab1b8608d429e5f239afb197de928d4de7d; version=01af542392b5d41fd659d487015a71f627accce3 <f30ccfc2985590b33a23a3d8bed7ca16c0af551b; version=272a9b26c336a295e4e209157fed809706c1b1f7; version=2f70ba9dae13a190673cc3f9b4aad52179738f60; version=38c28fe25611099230f0965c925499bfcf46a795 <2a71e01b2cf9b4329ff67102c1bea7448c2a2d2d; version=5.10.253 <5.11; version=5.15.203 <5.16; version=6.1.168 <6.2; version=6.12.81 <6.12.88; version=6.18.22 <6.18.30; version=6.19.12 <6.20; version=6.6.134 <6.6.140; version=7.0; version=8763f8317bb389aded32a32b08f6751cfff657d2 <be2c1d825f54277472c87019e82013ac534ddc4c; version=a6e5461f076c2ef63159f18e5cdbd30b50f0bc15; version=aaeae6533d77e6ed4def85baec01e2815ebbef61 <b0c0d44adb55c66663886cb6e30ee92cbb0f5385; version=ee248e6e941e4f2e634df2bd43e5f1ef810ab6df

Published CVSS scores

0.0Oracle LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:N
3.3Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
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
T1499.001OS Exhaustion Flood

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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