CVE-2024-26820: hv_netvsc: Register VF in netvsc_probe if NET_DEVICE_REGISTER missed
First published: Wed Apr 17 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: hv_netvsc: Register VF in netvsc_probe if NET_DEVICE_REGISTER missed If hv_netvsc driver is unloaded and reloaded, the NET_DEVICE_REGISTER handler cannot perform VF register successfully as the register call is received before netvsc_probe is finished. This is because we register register_netdevice_notifier() very early( even before vmbus_driver_register()). To fix this, we try to register each such matching VF( if it is visible as a netdevice) at the end of netvsc_probe.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=4.19.301<4.19.310 | |
| Linux Kernel | >=5.4.263<5.4.272 | |
| Linux Kernel | >=5.10.203<5.10.213 | |
| Linux Kernel | >=5.15.141<5.15.152 | |
| Linux Kernel | >=6.1.65<6.1.79 | |
| Linux Kernel | >=6.6.4<6.6.18 | |
| Linux Kernel | >=6.7<6.7.6 | |
| Linux Kernel | =6.8-rc1 | |
| Linux Kernel | =6.8-rc2 | |
| Linux Kernel | =6.8-rc3 | |
| Debian Linux | =10.0 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.133-1 6.12.22-1 |
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Reference Links
- https://git.kernel.org/stable/c/309ef7de5d840e17607e7d65cbf297c0564433ef
- https://git.kernel.org/stable/c/4d29a58d96a78728cb01ee29ed70dc4bd642f135
- https://git.kernel.org/stable/c/5b10a88f64c0315cfdef45de0aaaa4eef57de0b7
- https://git.kernel.org/stable/c/9cae43da9867412f8bd09aee5c8a8dc5e8dc3dc2
- https://git.kernel.org/stable/c/a71302c8638939c45e4ba5a99ea438185fd3f418
- https://git.kernel.org/stable/c/b6d46f306b3964d05055ddaa96b58cd8bd3a472c
- https://git.kernel.org/stable/c/bcb7164258d0a9a8aa2e73ddccc2d78f67d2519d
- https://git.kernel.org/stable/c/c7441c77c91e47f653104be8353b44a3366a5366
- https://launchpad.net/bugs/cve/CVE-2024-26820
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-26820
- https://nvd.nist.gov/vuln/detail/CVE-2024-26820
- https://security-tracker.debian.org/tracker/CVE-2024-26820
- https://ubuntu.com/security/CVE-2024-26820
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
- https://git.kernel.org/linus/9cae43da9867412f8bd09aee5c8a8dc5e8dc3dc2
Frequently Asked Questions
What is the severity of CVE-2024-26820?
CVE-2024-26820 has a moderate severity level as it involves issues with the netvsc driver related to VF registration.
How do I fix CVE-2024-26820?
To fix CVE-2024-26820, ensure that you update to the patched versions of the Linux kernel: 5.10.223-1, 5.10.226-1, 6.1.123-1, 6.1.119-1, 6.12.11-1, or 6.12.12-1.
Which software is affected by CVE-2024-26820?
CVE-2024-26820 affects specific versions of the Linux kernel packages provided by Debian.
What does CVE-2024-26820 involve?
CVE-2024-26820 involves a vulnerability in the hv_netvsc driver where the VF registration fails after the driver is unloaded and reloaded.
Is there a workaround for CVE-2024-26820?
While the most effective mitigation is to upgrade to a fixed kernel version, specific workarounds depend on the system configuration and use case.
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