In the Linux kernel, the following vulnerability has been resolved: spi: mpc52xx: fix use-after-free on registration failure Make sure to disable… (CVE-2026-46241)
In the Linux kernel, the following vulnerability has been resolved: spi: mpc52xx: fix use-after-free on registration failure Make sure to disable and free the interrupts in case controller registration fails to avoid a potential use-after-free and resource leak. This issue was flagged by Sashiko when reviewing a controller deregistration fix.
AI Analysis
Technical Summary
The Linux kernel contained a use-after-free vulnerability in the spi: mpc52xx driver caused by improper handling of interrupts during controller registration failure. Specifically, if the controller registration failed, interrupts were not disabled and freed, leading to potential use-after-free conditions and resource leaks. This was identified during a review of a controller deregistration fix. The vulnerability affects various Ubuntu LTS versions and related distributions prior to fixed kernel versions. The issue has been resolved by ensuring interrupts are disabled and freed upon registration failure.
Potential Impact
Successful exploitation could lead to memory corruption due to use-after-free, resulting in potential system crashes or arbitrary code execution with limited privileges. The vulnerability impacts confidentiality, integrity, and availability of affected systems.
Mitigation Recommendations
A fix is available that addresses the use-after-free by properly disabling and freeing interrupts when controller registration fails. Users should update to the fixed Linux kernel versions at or beyond 6.8.0-1061.64~22.04.1, 6.8.0-1063.71~22.04.1, 6.8.0-1062.69~22.04.1, 6.8.0-1064.72~22.04.1, and 6.8.0-136.136~22.04.1 or later. Applying these updates will mitigate the vulnerability.
In the Linux kernel, the following vulnerability has been resolved: spi: mpc52xx: fix use-after-free on registration failure Make sure to disable… (CVE-2026-46241)
Description
In the Linux kernel, the following vulnerability has been resolved: spi: mpc52xx: fix use-after-free on registration failure Make sure to disable and free the interrupts in case controller registration fails to avoid a potential use-after-free and resource leak. This issue was flagged by Sashiko when reviewing a controller deregistration fix.
CVSS v3.1
Score 7.8high
Affected software
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protected]~16.04.1?arch=source&distro=esm-infra-legacy/xenialpkg:deb/ubuntu/[email protected]?arch=source&distro=fips-updates/xenialpkg:deb/ubuntu/[email protected]?arch=source&distro=fips/xenialpkg:deb/ubuntu/[email protected]?arch=source&distro=esm-infra/bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=esm-infra/bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]~18.04.1?arch=source&distro=esm-infra/bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=esm-infra/bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]~18.04.1?arch=source&distro=esm-infra/bionicpkg:deb/ubuntu/[email protected]~18.04.2?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=esm-infra/bionicpkg:deb/ubuntu/[email 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protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel contained a use-after-free vulnerability in the spi: mpc52xx driver caused by improper handling of interrupts during controller registration failure. Specifically, if the controller registration failed, interrupts were not disabled and freed, leading to potential use-after-free conditions and resource leaks. This was identified during a review of a controller deregistration fix. The vulnerability affects various Ubuntu LTS versions and related distributions prior to fixed kernel versions. The issue has been resolved by ensuring interrupts are disabled and freed upon registration failure.
Potential Impact
Successful exploitation could lead to memory corruption due to use-after-free, resulting in potential system crashes or arbitrary code execution with limited privileges. The vulnerability impacts confidentiality, integrity, and availability of affected systems.
Mitigation Recommendations
A fix is available that addresses the use-after-free by properly disabling and freeing interrupts when controller registration fails. Users should update to the fixed Linux kernel versions at or beyond 6.8.0-1061.64~22.04.1, 6.8.0-1063.71~22.04.1, 6.8.0-1062.69~22.04.1, 6.8.0-1064.72~22.04.1, and 6.8.0-136.136~22.04.1 or later. Applying these updates will mitigate the vulnerability.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-46241
- Osv Schema Version
- 1.7.0
- Aliases
- []
- Ecosystems
- ["Ubuntu:Pro:14.04:LTS","Ubuntu:Pro:16.04:LTS","Ubuntu:16.04:LTS","Ubuntu:Pro:FIPS:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:18.04:LTS","Ubuntu:Pro:FIPS-updates:18.04:LTS","Ubuntu:Pro:FIPS:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:20.04:LTS","Ubuntu:Pro:FIPS-updates:20.04:LTS","Ubuntu:Pro:FIPS:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:Nvidia-BlueField:22.04:LTS","Ubuntu:Pro:FIPS-preview:22.04:LTS","Ubuntu:Pro:FIPS-updates:22.04:LTS","Ubuntu:Pro:Realtime:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:Nvidia-BlueField:24.04:LTS","Ubuntu:Pro:FIPS-updates:24.04:LTS","Ubuntu:Pro:Realtime:24.04:LTS","Ubuntu:25.10","Ubuntu:26.04:LTS"]
- Database Specific Severity
- null
- Cvss Version
- 3.1
Threat ID: 6a5a01a091ae9bcd3f80591f
Added to database: 07/17/2026, 10:19:12 UTC
Last enriched: 07/30/2026, 14:54:23 UTC
Last updated: 07/31/2026, 19:30:21 UTC
Views: 4
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