CVE-2026-46219

Kernel memory corruption via unbind work race

Published May 28, 2026 · Updated May 28, 2026

Use-after-free in the Linux kernel's mpc52xx SPI driver allows local users to corrupt kernel memory during driver unbind. The mpc52xx_spi_remove function cancels state-machine work before freeing its IRQs, so an interrupt can queue that work again after cancellation and leave teardown code using released state. Reachability requires local low-privileged access and a bound mpc52xx SPI device; exploitation can expose or modify kernel memory or crash the system.

CVSS severity7.8
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Use-after-free in the Linux kernel's mpc52xx SPI driver allows local users to corrupt kernel memory during driver unbind. The mpc52xx_spi_remove function cancels state-machine work before freeing its IRQs, so an interrupt can queue that work again after cancellation and leave teardown code using released state. Reachability requires local low-privileged access and a bound mpc52xx SPI device; exploitation can expose or modify kernel memory or crash the system.

The record

CVE
CVE-2026-46219
Published
May 28, 2026
Updated
May 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416, T1068
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=373d55a47dc662e5e30d12ad5d334312f757c1f1
  2. Affected versionversion=5.10.231 <5.11
  3. Affected versionversion=5.15.174 <5.16
  4. Affected versionversion=5.4.287 <5.5
  5. Affected versionversion=6.1.120 <6.2
  6. Affected versionversion=6.12.5 <6.12.90
  7. Affected versionversion=6.13
  8. Affected versionversion=6.6.66 <6.6.140
  9. Affected versionversion=90b72189de2cddacb26250579da0510b29a8b82b <ee52da0dd83ebcd89ecbbe2660c57b15a25489f2
  10. Affected versionversion=984836621aad98802d92c4a3047114cf518074c8 <6c3e413919a12627d04a31a4a5fccb9fc129bb02
  11. Affected versionversion=984836621aad98802d92c4a3047114cf518074c8 <706b3dc2ac7a998c55e14b3fd2e8f934c367e6e0
  12. Affected versionversion=984836621aad98802d92c4a3047114cf518074c8 <bbcd6dd8e9f264440eaf6167382bf404911c1c46
  13. Affected versionversion=cd5106c77d6d6828aa82449f01f4eb436d602a21
  14. Affected versionversion=d0cde3911cf24e1bcdd4caa1d1b9ef57589db5a1
  15. Affected versionversion=e0c6ce8424095c2da32a063d3fc027494c689817
  16. Affected versionversion=f65d85bc1ffd8a2c194bb2cd65e35ed3648ddd59 <bb6b50f709c5a01906ff72a07fdc070bb3357188

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=373d55a47dc662e5e30d12ad5d334312f757c1f1; version=5.10.231 <5.11; version=5.15.174 <5.16; version=5.4.287 <5.5; version=6.1.120 <6.2; version=6.12.5 <6.12.90; version=6.13; version=6.6.66 <6.6.140; version=90b72189de2cddacb26250579da0510b29a8b82b <ee52da0dd83ebcd89ecbbe2660c57b15a25489f2; version=984836621aad98802d92c4a3047114cf518074c8 <6c3e413919a12627d04a31a4a5fccb9fc129bb02; version=984836621aad98802d92c4a3047114cf518074c8 <706b3dc2ac7a998c55e14b3fd2e8f934c367e6e0; version=984836621aad98802d92c4a3047114cf518074c8 <bbcd6dd8e9f264440eaf6167382bf404911c1c46; version=cd5106c77d6d6828aa82449f01f4eb436d602a21; version=d0cde3911cf24e1bcdd4caa1d1b9ef57589db5a1; version=e0c6ce8424095c2da32a063d3fc027494c689817; version=f65d85bc1ffd8a2c194bb2cd65e35ed3648ddd59 <bb6b50f709c5a01906ff72a07fdc070bb3357188

Published CVSS scores

7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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.

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

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-416Use After Free
T1068Exploitation for Privilege Escalation

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo