CVE-2026-90163Hinoki check available

Resource leakage via incomplete module-initialization cleanup

Published Sep 17, 2026 · Updated Sep 17, 2026

Resource leakage in Linux 7.0 ksmbd allows local users to leave kernel allocations unreleased after module initialization fails. In fs/smb/server/server.c, ksmbd_server_init() skips ksmbd_proc_cleanup() on later initialization errors, retaining the proc tree and per-CPU counters. The path requires a failed module load and privileged local access; no specific crash, hang, or remote trigger is documented.

CVSS severity2.3
Low
EPSS probability0.20%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Resource leakage in Linux 7.0 ksmbd allows local users to leave kernel allocations unreleased after module initialization fails. In fs/smb/server/server.c, ksmbd_server_init() skips ksmbd_proc_cleanup() on later initialization errors, retaining the proc tree and per-CPU counters. The path requires a failed module load and privileged local access; no specific crash, hang, or remote trigger is documented.

The record

CVE
CVE-2026-90163
Published
Sep 17, 2026
Updated
Sep 17, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
admin

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=7.0
  2. Affected versionversion=b38f99c1217ae04753340f0fdcd8f35bf56841dc <7d2cd9269b570347e6e2dd24d4b3c1da868bc91d
  3. Affected versionversion=b38f99c1217ae04753340f0fdcd8f35bf56841dc <f43cbe3b58ce989ce420c3bc875d48e7754c8aba

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=7.0; version=b38f99c1217ae04753340f0fdcd8f35bf56841dc <7d2cd9269b570347e6e2dd24d4b3c1da868bc91d; version=b38f99c1217ae04753340f0fdcd8f35bf56841dc <f43cbe3b58ce989ce420c3bc875d48e7754c8aba

Published CVSS scores

2.3Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L
5.5TenableCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.9TenableAV:L/AC:L/Au:N/C:N/I:N/A:C

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesadmin
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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