CVE-2026-93037 RDMA/hfi1: Propagate sdma_txinit_ahg() errors
A missing error check in the Linux kernel RDMA driver allows processing uninitialized requests, potentially leading to system instability or crashes.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-93037?
CVE-2026-93037 is a high-severity vulnerability in Linux, published on 17 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-93037?
How do I fix CVE-2026-93037?
Apply the vendor's patch.
Is CVE-2026-93037 being exploited?
There is no known exploitation of CVE-2026-93037 in the wild and no public exploit code.
Sources
Also known as AZL-103023, BELL-CVE-2026-93037, DEBIAN-CVE-2026-93037, GHSA-rqc6-x86p-g5jv, UBUNTU-CVE-2026-93037.