CVE-2026-93082Hinoki check available

Probe failure via leaked receiver mailbox

Published Sep 17, 2026 · Updated Sep 17, 2026

Linux 6.11 ARM SCMI mailbox resource leakage allows attackers to block later driver probe attempts via a receiver setup failure. The mailbox_chan_setup() function returns after an additional P2A receiver request fails without releasing the primary channel already allocated. The failure requires the ARM SCMI mailbox transport and that setup error; attacker control of the error is undocumented, and the reported consequence is a busy channel rather than a kernel crash.

CVSS severity2.0
Low
EPSS probability0.21%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Linux 6.11 ARM SCMI mailbox resource leakage allows attackers to block later driver probe attempts via a receiver setup failure. The mailbox_chan_setup() function returns after an additional P2A receiver request fails without releasing the primary channel already allocated. The failure requires the ARM SCMI mailbox transport and that setup error; attacker control of the error is undocumented, and the reported consequence is a busy channel rather than a kernel crash.

The record

CVE
CVE-2026-93082
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=6.11
  2. Affected versionversion=fa8b28ba22d95be4d2dd3c37fbdbdc066af82941 <3515aed7fe424b79c49ff9cd51f7802a64a4ab7b
  3. Affected versionversion=fa8b28ba22d95be4d2dd3c37fbdbdc066af82941 <3b0b02134ab90202af80b102fa37196b9689e86f
  4. Affected versionversion=fa8b28ba22d95be4d2dd3c37fbdbdc066af82941 <4c2a5d72357e5c6743c23b59615da287140d9d31
  5. Affected versionversion=fa8b28ba22d95be4d2dd3c37fbdbdc066af82941 <f3e3773c4e5e96549d7540d8ddeb4fcd534f6f1d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.11; version=fa8b28ba22d95be4d2dd3c37fbdbdc066af82941 <3515aed7fe424b79c49ff9cd51f7802a64a4ab7b; version=fa8b28ba22d95be4d2dd3c37fbdbdc066af82941 <3b0b02134ab90202af80b102fa37196b9689e86f; version=fa8b28ba22d95be4d2dd3c37fbdbdc066af82941 <4c2a5d72357e5c6743c23b59615da287140d9d31; version=fa8b28ba22d95be4d2dd3c37fbdbdc066af82941 <f3e3773c4e5e96549d7540d8ddeb4fcd534f6f1d

Published CVSS scores

2.5Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
2.5SUSECVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
2.0SUSECVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

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
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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