Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Don't store mlx5e_priv in mlx5e_dev devlink priv mlx5e_priv is an… (CVE-2026-22996)
A vulnerability in the Linux kernel's mlx5e network driver was resolved that involved improper storage of the mlx5e_priv structure in mlx5e_dev devlink private data. This flaw could cause a kernel oops during profile changes in switchdev mode, leading to potential denial of service. The issue was fixed by changing how references to netdev and mdev are stored. The vulnerability has a CVSS score of 5.5 (medium severity) and affects multiple Linux kernel versions prior to 6.8.0-1055.56 and related builds. A patch is available and users are advised to update and reboot to apply the fix. The vendor advisory confirms the fix and provides updated package versions for Ubuntu Linux kernels.
AI Analysis
Technical Summary
The Linux kernel vulnerability CVE-2026-22996 concerns the mlx5e network driver where the mlx5e_priv structure was improperly stored within mlx5e_dev devlink private data. Because mlx5e_priv is unstable and can be zeroed out if profile attaching fails, referencing it directly could cause a kernel oops during mlx5e_remove when switchdev mode fails due to profile change failure. The fix involves storing the netdev directly in mlx5e_dev and obtaining mdev from the mlx5_adev auxiliary device structure, preventing invalid references and kernel crashes. This issue affects several Linux kernel versions prior to 6.8.0-1055.56 and related builds in the linux-hwe-edge product line. The vulnerability has a CVSS 3.1 score of 5.5 with local attack vector, low complexity, low privileges required, no user interaction, unchanged scope, no confidentiality or integrity impact, but high impact on availability. The vendor advisory from Ubuntu confirms the patch availability and advises updating to fixed kernel versions and rebooting. Due to ABI changes, recompilation of third-party kernel modules may be required.
Potential Impact
This vulnerability can cause a kernel oops (crash) in the mlx5e network driver when switchdev mode fails due to profile change failure, resulting in denial of service (availability impact). There is no confidentiality or integrity impact reported. The attack requires local privileges and low complexity. No known exploits are reported in the wild.
Mitigation Recommendations
A patch is available from the vendor. Users should update their Linux kernel packages to the fixed versions as specified in the Ubuntu security advisories (e.g., linux-image-6.8.0-1055.56 and later) and reboot the system to apply the updates. Due to an ABI change, recompilation and reinstallation of any third-party kernel modules may be necessary. Follow the vendor's update instructions carefully.
Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Don't store mlx5e_priv in mlx5e_dev devlink priv mlx5e_priv is an… (CVE-2026-22996)
Description
A vulnerability in the Linux kernel's mlx5e network driver was resolved that involved improper storage of the mlx5e_priv structure in mlx5e_dev devlink private data. This flaw could cause a kernel oops during profile changes in switchdev mode, leading to potential denial of service. The issue was fixed by changing how references to netdev and mdev are stored. The vulnerability has a CVSS score of 5.5 (medium severity) and affects multiple Linux kernel versions prior to 6.8.0-1055.56 and related builds. A patch is available and users are advised to update and reboot to apply the fix. The vendor advisory confirms the fix and provides updated package versions for Ubuntu Linux kernels.
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]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=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]?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 protected]~18.04.2?arch=source&distro=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=bionicpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=esm-infra/focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.2?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=esm-infra/focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=focalpkg:deb/ubuntu/[email protected]+cvm1.1?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.3?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=esm-infra/focalpkg:deb/ubuntu/[email protected]?arch=source&distro=focalpkg:deb/ubuntu/[email protected]?arch=source&distro=focalpkg:deb/ubuntu/[email 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protected]+fips1?arch=source&distro=fips-updates/jammypkg:deb/ubuntu/[email protected]+fips1?arch=source&distro=fips-updates/jammypkg:deb/ubuntu/[email protected]?arch=source&distro=realtime/jammypkg:deb/ubuntu/[email protected]?arch=source&distro=realtime/jammypkg:deb/ubuntu/[email protected]~22.04.1?arch=source&distro=realtime/jammypkg:deb/ubuntu/[email protected]?arch=source&distro=noblepkg:deb/ubuntu/[email protected]?arch=source&distro=noblepkg:deb/ubuntu/[email protected]~24.04.1?arch=source&distro=noblepkg:deb/ubuntu/[email protected]~24.04.1?arch=source&distro=noblepkg:deb/ubuntu/[email protected]?arch=source&distro=noblepkg:deb/ubuntu/[email protected]~24.04.1?arch=source&distro=noblepkg:deb/ubuntu/[email protected]~24.04.1?arch=source&distro=noblepkg:deb/ubuntu/[email protected]~24.04.1?arch=source&distro=noblepkg:deb/ubuntu/[email protected]?arch=source&distro=noblepkg:deb/ubuntu/[email protected]~24.04.1?arch=source&distro=noblepkg:deb/ubuntu/[email 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protected]?arch=source&distro=noblepkg:deb/ubuntu/[email protected]?arch=source&distro=bluefield/noblepkg:deb/ubuntu/[email protected]+fips1?arch=source&distro=fips-updates/noblepkg:deb/ubuntu/[email protected]+fips1?arch=source&distro=fips-updates/noblepkg:deb/ubuntu/[email protected]+fips1?arch=source&distro=fips-updates/noblepkg:deb/ubuntu/[email protected]+fips1?arch=source&distro=fips-updates/noblepkg:deb/ubuntu/[email protected]?arch=source&distro=realtime/noblepkg:deb/ubuntu/[email protected]?arch=source&distro=realtime/noblepkg:deb/ubuntu/[email protected]~24.04.1?arch=source&distro=realtime/noblepkg:deb/ubuntu/[email protected]~24.04.1?arch=source&distro=realtime/noblepkg: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=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=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
The Linux kernel vulnerability CVE-2026-22996 concerns the mlx5e network driver where the mlx5e_priv structure was improperly stored within mlx5e_dev devlink private data. Because mlx5e_priv is unstable and can be zeroed out if profile attaching fails, referencing it directly could cause a kernel oops during mlx5e_remove when switchdev mode fails due to profile change failure. The fix involves storing the netdev directly in mlx5e_dev and obtaining mdev from the mlx5_adev auxiliary device structure, preventing invalid references and kernel crashes. This issue affects several Linux kernel versions prior to 6.8.0-1055.56 and related builds in the linux-hwe-edge product line. The vulnerability has a CVSS 3.1 score of 5.5 with local attack vector, low complexity, low privileges required, no user interaction, unchanged scope, no confidentiality or integrity impact, but high impact on availability. The vendor advisory from Ubuntu confirms the patch availability and advises updating to fixed kernel versions and rebooting. Due to ABI changes, recompilation of third-party kernel modules may be required.
Potential Impact
This vulnerability can cause a kernel oops (crash) in the mlx5e network driver when switchdev mode fails due to profile change failure, resulting in denial of service (availability impact). There is no confidentiality or integrity impact reported. The attack requires local privileges and low complexity. No known exploits are reported in the wild.
Mitigation Recommendations
A patch is available from the vendor. Users should update their Linux kernel packages to the fixed versions as specified in the Ubuntu security advisories (e.g., linux-image-6.8.0-1055.56 and later) and reboot the system to apply the updates. Due to an ABI change, recompilation and reinstallation of any third-party kernel modules may be necessary. Follow the vendor's update instructions carefully.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-22996
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:16.04:LTS","Ubuntu:18.04:LTS","Ubuntu:20.04:LTS","Ubuntu:Pro: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: 6a5b63752d1edb114c8b4acb
Added to database: 07/18/2026, 11:28:53 UTC
Last enriched: 08/22/2026, 21:47:54 UTC
Last updated: 09/10/2026, 19:36:52 UTC
Views: 11
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