Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix crash on profile change rollback failure… (CVE-2026-23000)
A vulnerability in the Linux kernel's mlx5e network driver could cause a system crash when attempting to change network profiles if a rollback fails. This occurs because the function mlx5e_netdev_change_profile may fail to attach a new profile and also fail to rollback to the old profile, resulting in a dangling network device with a reset private data structure. Subsequent attempts to change the profile can then crash the system due to null pointer dereferences. This issue has been fixed by improving error handling in the profile change function to avoid accessing invalid pointers.
AI Analysis
Technical Summary
CVE-2026-23000 describes a flaw in the Linux kernel's mlx5e network driver where mlx5e_netdev_change_profile can fail to attach a new profile and also fail to rollback to the old profile, leaving a dangling netdev with a reset netdev_priv. A retry to change the profile then crashes due to attempts to access a NULL priv->mdev pointer. The fix involves modifying mlx5e_netdev_change_profile to handle previous failures and empty priv pointers properly by not assuming priv is valid, passing netdev and mdev explicitly, and attaching new profiles without accessing invalid old profiles. This prevents the crash when enabling switchdev mode after a first-time failure.
Potential Impact
The vulnerability can cause a denial of service via a kernel crash when network profile changes fail and rollback attempts also fail. This results in system instability or downtime. There is no indication of confidentiality or integrity impact. The CVSS score of 5.5 (medium) reflects the local attack vector requiring low privileges and no user interaction, with impact limited to availability.
Mitigation Recommendations
An official fix is available and has been released by Ubuntu as part of their Linux kernel updates. Users should apply the kernel updates provided in the Ubuntu security notices (e.g., USN-8278-1) and reboot their systems to ensure the vulnerability is remediated. Due to ABI changes, recompilation and reinstallation of third-party kernel modules may be required. No additional mitigation steps are necessary beyond applying the official patches.
Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix crash on profile change rollback failure… (CVE-2026-23000)
Description
A vulnerability in the Linux kernel's mlx5e network driver could cause a system crash when attempting to change network profiles if a rollback fails. This occurs because the function mlx5e_netdev_change_profile may fail to attach a new profile and also fail to rollback to the old profile, resulting in a dangling network device with a reset private data structure. Subsequent attempts to change the profile can then crash the system due to null pointer dereferences. This issue has been fixed by improving error handling in the profile change function to avoid accessing invalid pointers.
CVSS v3.1
Score 5.5medium
Affected software
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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-2026-23000 describes a flaw in the Linux kernel's mlx5e network driver where mlx5e_netdev_change_profile can fail to attach a new profile and also fail to rollback to the old profile, leaving a dangling netdev with a reset netdev_priv. A retry to change the profile then crashes due to attempts to access a NULL priv->mdev pointer. The fix involves modifying mlx5e_netdev_change_profile to handle previous failures and empty priv pointers properly by not assuming priv is valid, passing netdev and mdev explicitly, and attaching new profiles without accessing invalid old profiles. This prevents the crash when enabling switchdev mode after a first-time failure.
Potential Impact
The vulnerability can cause a denial of service via a kernel crash when network profile changes fail and rollback attempts also fail. This results in system instability or downtime. There is no indication of confidentiality or integrity impact. The CVSS score of 5.5 (medium) reflects the local attack vector requiring low privileges and no user interaction, with impact limited to availability.
Mitigation Recommendations
An official fix is available and has been released by Ubuntu as part of their Linux kernel updates. Users should apply the kernel updates provided in the Ubuntu security notices (e.g., USN-8278-1) and reboot their systems to ensure the vulnerability is remediated. Due to ABI changes, recompilation and reinstallation of third-party kernel modules may be required. No additional mitigation steps are necessary beyond applying the official patches.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-23000
- 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: 6a5b63742d1edb114c8b4a26
Added to database: 07/18/2026, 11:28:52 UTC
Last enriched: 08/22/2026, 21:47:18 UTC
Last updated: 09/10/2026, 19:24:58 UTC
Views: 9
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