Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: net: liquidio: Initialize netdev pointer before queue setup In… (CVE-2026-23258)
A memory leak vulnerability (CVE-2026-23258) in the Linux kernel's liquidio network driver was resolved by ensuring proper initialization of the netdev pointer before queue setup. The issue occurs when error conditions prevent cleanup from freeing allocated memory, leading to a leak. This vulnerability has a medium severity with a CVSS score of 5.5 and does not impact confidentiality or integrity but affects availability. A patch is available for affected Linux kernel versions prior to specific 5.15.0-xxx releases. Users should update their systems and reboot to apply the fix.
AI Analysis
Technical Summary
CVE-2026-23258 is a memory leak vulnerability in the Linux kernel's liquidio network driver. In the setup_nic_devices() function, the netdev pointer is allocated but not assigned before calls to netif_set_real_num_rx_queues() and netif_set_real_num_tx_queues(). If these calls fail, the function returns without freeing the allocated netdev because the pointer is still NULL, causing a memory leak. The fix involves initializing the netdev pointer before queue setup to ensure proper cleanup on error. This vulnerability was identified via static analysis and code review and affects certain Linux kernel versions prior to 5.15.0-1111.118~20.04.1 and related builds.
Potential Impact
The vulnerability results in a memory leak in the Linux kernel's liquidio network driver when queue setup functions fail. While it does not compromise confidentiality or integrity, it impacts system availability by leaking memory resources. There are no known exploits in the wild. The CVSS 3.1 base score is 5.5 (medium severity), reflecting local attack vector with low privileges required and no user interaction needed.
Mitigation Recommendations
An official patch is available and should be applied by updating the Linux kernel to versions at or beyond 5.15.0-1111.118~20.04.1 or the corresponding fixed releases. After updating, a system reboot is required to complete remediation. The vendor advisory from Ubuntu confirms the availability of fixes and recommends standard system updates. No additional mitigation steps are necessary beyond applying the official kernel updates.
Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: net: liquidio: Initialize netdev pointer before queue setup In… (CVE-2026-23258)
Description
A memory leak vulnerability (CVE-2026-23258) in the Linux kernel's liquidio network driver was resolved by ensuring proper initialization of the netdev pointer before queue setup. The issue occurs when error conditions prevent cleanup from freeing allocated memory, leading to a leak. This vulnerability has a medium severity with a CVSS score of 5.5 and does not impact confidentiality or integrity but affects availability. A patch is available for affected Linux kernel versions prior to specific 5.15.0-xxx releases. Users should update their systems and reboot to apply the fix.
CVSS v3.1
Score 5.5medium
Affected software
pkg:deb/ubuntu/[email protected]~16.04.1?arch=source&distro=xenialpkg: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=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]~18.04.1?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]~18.04.1?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]~18.04.1?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email 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protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingRun on your own infrastructure? 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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-23258 is a memory leak vulnerability in the Linux kernel's liquidio network driver. In the setup_nic_devices() function, the netdev pointer is allocated but not assigned before calls to netif_set_real_num_rx_queues() and netif_set_real_num_tx_queues(). If these calls fail, the function returns without freeing the allocated netdev because the pointer is still NULL, causing a memory leak. The fix involves initializing the netdev pointer before queue setup to ensure proper cleanup on error. This vulnerability was identified via static analysis and code review and affects certain Linux kernel versions prior to 5.15.0-1111.118~20.04.1 and related builds.
Potential Impact
The vulnerability results in a memory leak in the Linux kernel's liquidio network driver when queue setup functions fail. While it does not compromise confidentiality or integrity, it impacts system availability by leaking memory resources. There are no known exploits in the wild. The CVSS 3.1 base score is 5.5 (medium severity), reflecting local attack vector with low privileges required and no user interaction needed.
Mitigation Recommendations
An official patch is available and should be applied by updating the Linux kernel to versions at or beyond 5.15.0-1111.118~20.04.1 or the corresponding fixed releases. After updating, a system reboot is required to complete remediation. The vendor advisory from Ubuntu confirms the availability of fixes and recommends standard system updates. No additional mitigation steps are necessary beyond applying the official kernel updates.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-23258
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:16.04:LTS","Ubuntu:18.04:LTS","Ubuntu:Pro: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"]
- Cvss Version
- 3.1
Threat ID: 6a58b4e168715ace43daf194
Added to database: 07/16/2026, 10:39:29 UTC
Last enriched: 08/01/2026, 06:55:29 UTC
Last updated: 09/14/2026, 22:01:32 UTC
Views: 16
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