Bug 2536464 (CVE-2026-93037)

Summary:	CVE-2026-93037 kernel: RDMA/hfi1: Propagate sdma_txinit_ahg() errors
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	akhatavk, aos-team-art-private, asdas, dpaolell, jdelft, jupierce, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, rhel-process-autobot, sghai, sidsharm, suppawar, vlaad, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
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Doc Text:	A flaw was found in the Linux kernel's RDMA/hfi1 component. The `set_txreq_header_ahg()` function fails to properly handle errors returned by `sdma_txinit_ahg()`. This oversight allows the system to continue processing requests as if they were successfully initialized, even when an error occurred. This could lead to system instability or unexpected behavior.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-09-17 18:03:26 UTC

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.

Comment 1 gkamathe 2026-09-19 18:42:52 UTC

Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-93037.mbox