hv_netvsc: Register VF in netvsc_probe if NET_DEVICE_REGISTER missed
Priority LOW 24Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 3 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00237 14th percentileScored 2026-11-07
Fix Partial Linux (Linux): 4.19.310, 5.4.272, 5.10.213 +5Red Hat: 3 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 4.19.301 to before 4.19.310; 5.4.263 to before 5.4.272; 5.10.203 to before 5.10.213; 5.15.141 to before 5.15.152; 6.1.65 to before 6.1.79; 6.6.4 to before 6.6.18 | 4.19.310, 5.4.272, 5.10.213, 5.15.152, 6.1.79, 6.6.18 | Patch available | CNA |
| Linux | Linux | 6.7 and later | 4.19.310, 5.4.272, 5.10.213, 5.15.152, 6.1.79, 6.6.18, 6.7.6, 6.8 | Patch available | CNA |
- Linux VendorLinux Affected 4.19.301 to before 4.19.310; 5.4.263 to before 5.4.272; 5.10.203 to before 5.10.213; 5.15.141 to before 5.15.152; 6.1.65 to before 6.1.79; 6.6.4 to before 6.6.18 Fixed in 4.19.310, 5.4.272, 5.10.213, 5.15.152, 6.1.79, 6.6.18 Patch available CNA
- Linux VendorLinux Affected 6.7 and later Fixed in 4.19.310, 5.4.272, 5.10.213, 5.15.152, 6.1.79, 6.6.18, 6.7.6, 6.8 Patch available CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 4.19.301 to before 4.19.310; 5.4.263 to before 5.4.272; 5.10.203 to before 5.10.213; 5.15.141 to before 5.15.152; 6.1.65 to before 6.1.79; 6.6.4 to before 6.6.18; 6.7 to before 6.7.6 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:* | 6.8 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.8:rc2:*:*:*:*:*:* | 6.8 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.8:rc3:*:*:*:*:*:* | 6.8 rc3 | Vulnerable | Linux |
| cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | 10.0 | Vulnerable | Debian |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.19.301 to before 4.19.310; 5.4.263 to before 5.4.272; 5.10.203 to before 5.10.213; 5.15.141 to before 5.15.152; 6.1.65 to before 6.1.79; 6.6.4 to before 6.6.18; 6.7 to before 6.7.6 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:* Versions 6.8 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.8:rc2:*:*:*:*:*:* Versions 6.8 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.8:rc3:*:*:*:*:*:* Versions 6.8 rc3 Vulnerable ·Linux
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
Remediation
- Fix · CNA Linux (Linux) Fixed in 4.19.310, 5.4.272, 5.10.213, 5.15.152, 6.1.79, 6.6.18
- Fix · CNA Linux (Linux) Fixed in 4.19.310, 5.4.272, 5.10.213, 5.15.152, 6.1.79, 6.6.18, 6.7.6, 6.8
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 9 | Affected | No fix yet |
Not affected: 1 product
- Red Hat Enterprise Linux 8
Timeline
- 2026-10-02 Threatist record created from CVE-2024-26820
- 2026-10-03 Alias added: GHSA-2vvj-hm96-cr7r
References
Patch 8
- https://git.kernel.org/stable/c/bcb7164258d0a9a8aa2e73ddccc2d78f67d2519d
- https://git.kernel.org/stable/c/c7441c77c91e47f653104be8353b44a3366a5366
- https://git.kernel.org/stable/c/5b10a88f64c0315cfdef45de0aaaa4eef57de0b7
- https://git.kernel.org/stable/c/b6d46f306b3964d05055ddaa96b58cd8bd3a472c
- https://git.kernel.org/stable/c/309ef7de5d840e17607e7d65cbf297c0564433ef
- https://git.kernel.org/stable/c/a71302c8638939c45e4ba5a99ea438185fd3f418
- https://git.kernel.org/stable/c/4d29a58d96a78728cb01ee29ed70dc4bd642f135
- https://git.kernel.org/stable/c/9cae43da9867412f8bd09aee5c8a8dc5e8dc3dc2
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- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2024-26820 · CVE Program
- CVE-2024-26820 · NVD
- FIRST EPSS
- GHSA-2vvj-hm96-cr7r · GitHub Advisory Database · CC BY 4.0
- CVE-2024-26820 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences