CVE-2026-90128

Resource leakage via incorrect error-path cleanup

Published Sep 17, 2026 · Updated Sep 17, 2026

Resource leakage in Linux mlx5 vDPA allows local users to retain memory allocations through failed memory-region setup. In add_direct_chain(), err_alloc cleanup iterates mr->head instead of tmp, leaving newly allocated direct memory-region entries unfreed. Exposure requires mlx5 vDPA use and an allocation failure; the published description does not establish a crash or a reliable attacker-controlled trigger.

CVSS severity2.5
Low
EPSS probability0.21%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource leakage in Linux mlx5 vDPA allows local users to retain memory allocations through failed memory-region setup. In add_direct_chain(), err_alloc cleanup iterates mr->head instead of tmp, leaving newly allocated direct memory-region entries unfreed. Exposure requires mlx5 vDPA use and an allocation failure; the published description does not establish a crash or a reliable attacker-controlled trigger.

The record

CVE
CVE-2026-90128
Published
Sep 17, 2026
Updated
Sep 17, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=5.9
  2. Affected versionversion=94abbccdf2916cb03f9626f2d36c6e9971490c12 <22d52af9e26a72bdfe2dcfb1419a091de4862cd9
  3. Affected versionversion=94abbccdf2916cb03f9626f2d36c6e9971490c12 <23ae56d9e74c122f95cae71ae3b9fc259fb88446
  4. Affected versionversion=94abbccdf2916cb03f9626f2d36c6e9971490c12 <637d867530daea61898e3346975978b7f67fc2ac
  5. Affected versionversion=94abbccdf2916cb03f9626f2d36c6e9971490c12 <6ca752850de3b8162f030793cc15001aec85c4cf
  6. Affected versionversion=94abbccdf2916cb03f9626f2d36c6e9971490c12 <c678d04ac9e5a64c2559c43bce273e845fbd09eb
  7. Affected versionversion=94abbccdf2916cb03f9626f2d36c6e9971490c12 <c93defccf5eb0a92bdafa43487be6ce0221a2477
  8. Affected versionversion=94abbccdf2916cb03f9626f2d36c6e9971490c12 <ed3462365636df3bc63e34d7468f4faed3f70a4e
  9. Affected versionversion=94abbccdf2916cb03f9626f2d36c6e9971490c12 <eeac2ea4ad2654e3f160a9b608d05c9af31433a6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.9; version=94abbccdf2916cb03f9626f2d36c6e9971490c12 <22d52af9e26a72bdfe2dcfb1419a091de4862cd9; version=94abbccdf2916cb03f9626f2d36c6e9971490c12 <23ae56d9e74c122f95cae71ae3b9fc259fb88446; version=94abbccdf2916cb03f9626f2d36c6e9971490c12 <637d867530daea61898e3346975978b7f67fc2ac; version=94abbccdf2916cb03f9626f2d36c6e9971490c12 <6ca752850de3b8162f030793cc15001aec85c4cf; version=94abbccdf2916cb03f9626f2d36c6e9971490c12 <c678d04ac9e5a64c2559c43bce273e845fbd09eb; version=94abbccdf2916cb03f9626f2d36c6e9971490c12 <c93defccf5eb0a92bdafa43487be6ce0221a2477; version=94abbccdf2916cb03f9626f2d36c6e9971490c12 <ed3462365636df3bc63e34d7468f4faed3f70a4e; version=94abbccdf2916cb03f9626f2d36c6e9971490c12 <eeac2ea4ad2654e3f160a9b608d05c9af31433a6

Published CVSS scores

2.5Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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