CVE-2026-46083

Local service interruption via SPI resource leak

Published May 27, 2026 · Updated May 27, 2026

Resource leak in the Linux Kernel SPI subsystem allows local users to interrupt service through repeated device setup failures. During registration, the drivers/spi/spi.c error path returns after spi_setup() fails without invoking the controller cleanup() callback, leaving setup-allocated resources unreleased. Reachability requires low-privileged local access and a controller path that repeatedly fails SPI device setup; the documented consequence is resource exhaustion and loss of 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

Resource leak in the Linux Kernel SPI subsystem allows local users to interrupt service through repeated device setup failures. During registration, the drivers/spi/spi.c error path returns after spi_setup() fails without invoking the controller cleanup() callback, leaving setup-allocated resources unreleased. Reachability requires low-privileged local access and a controller path that repeatedly fails SPI device setup; the documented consequence is resource exhaustion and loss of availability.

The record

CVE
CVE-2026-46083
Published
May 27, 2026
Updated
May 27, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-401, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 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=3e7c190475d98099231ee8ae486d31b1e2e7535a
  2. Affected versionversion=4b8b7bc3a726268e5c15d9bafe27863a85fdfc8e
  3. Affected versionversion=5.10.44 <5.11
  4. Affected versionversion=5.12.11 <5.13
  5. Affected versionversion=5.13
  6. Affected versionversion=5.4.126 <5.5
  7. Affected versionversion=c7299fea67696db5bd09d924d1f1080d894f92ef <11baa8b24bcb07ae2048f2566a220021d766abe0
  8. Affected versionversion=c7299fea67696db5bd09d924d1f1080d894f92ef <1e774294b2f944f59e03a04eb438768a4b93c3ce
  9. Affected versionversion=c7299fea67696db5bd09d924d1f1080d894f92ef <a2c817c629430fbbd54273525b472dac96e2c8fd
  10. Affected versionversion=c7299fea67696db5bd09d924d1f1080d894f92ef <db357034f7e0cf23f233f414a8508312dfe8fbbe
  11. Affected versionversion=c7299fea67696db5bd09d924d1f1080d894f92ef <dbcead54b12468d9aa54c0e1f0042d838ec3b0ae
  12. Affected versionversion=e92ac9263b06c39f05526ad15c90d228cdab60fd

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=3e7c190475d98099231ee8ae486d31b1e2e7535a; version=4b8b7bc3a726268e5c15d9bafe27863a85fdfc8e; version=5.10.44 <5.11; version=5.12.11 <5.13; version=5.13; version=5.4.126 <5.5; version=c7299fea67696db5bd09d924d1f1080d894f92ef <11baa8b24bcb07ae2048f2566a220021d766abe0; version=c7299fea67696db5bd09d924d1f1080d894f92ef <1e774294b2f944f59e03a04eb438768a4b93c3ce; version=c7299fea67696db5bd09d924d1f1080d894f92ef <a2c817c629430fbbd54273525b472dac96e2c8fd; version=c7299fea67696db5bd09d924d1f1080d894f92ef <db357034f7e0cf23f233f414a8508312dfe8fbbe; version=c7299fea67696db5bd09d924d1f1080d894f92ef <dbcead54b12468d9aa54c0e1f0042d838ec3b0ae; version=e92ac9263b06c39f05526ad15c90d228cdab60fd

Published CVSS scores

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
T1499.004Endpoint Denial of Service: Application 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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