CVE-2026-93103
RDMA/hfi1: Preserve unit 0 on allocation failure
Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/hfi1: Preserve unit 0 on allocation failure hfi1_free_devdata() assumes that the device was inserted into the unit table and unconditionally erases dd->unit. If xa_alloc_irq() fails, the zero-initialized unit remains zero, so full cleanup can remove an unrelated device from index 0. Release only the rdmavt allocation and return immediately while the unit table has not acquired the device.
INFO
Published Date :
Sept. 17, 2026, 5:18 p.m.
Last Modified :
Sept. 17, 2026, 5:18 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Apply the fix to the RDMA/hfi1 driver.
- Ensure unit table correctly acquires the device.
- Release rdmavt allocation on failure.
- Do not unconditionally erase dd->unit.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-93103.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-93103 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-93103
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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CVE-2026-93103 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-93103 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Sep. 17, 2026
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: RDMA/hfi1: Preserve unit 0 on allocation failure hfi1_free_devdata() assumes that the device was inserted into the unit table and unconditionally erases dd->unit. If xa_alloc_irq() fails, the zero-initialized unit remains zero, so full cleanup can remove an unrelated device from index 0. Release only the rdmavt allocation and return immediately while the unit table has not acquired the device. Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/93xxx/CVE-2026-93103.json">CVE-2026-93103</a> Added Reference https://git.kernel.org/stable/c/0feb29d434e6cc0ebefec4f77be014c85ad751b0 Added Reference https://git.kernel.org/stable/c/2e3809ad8911f5d5581b3f046bd628417bface76 Added Reference https://git.kernel.org/stable/c/3d0e5252b8d0345ef494763ca31e3ddd666e02cb Added Reference https://git.kernel.org/stable/c/3f1e196eb66b8cd3882e373794d6cea46f150a20 Added Reference https://git.kernel.org/stable/c/4204f5c0312ba136181a6e148ffa0bfaf95a4cc1 Added Reference https://git.kernel.org/stable/c/4ff9d58d34758e9633078b37e8d5289b513ff80e Added Reference https://git.kernel.org/stable/c/852637d3ee56aed8ea3ee8948eda21eca406c051 Added Reference https://git.kernel.org/stable/c/fd4d3ad5f244a867166d1e2da7ece3d82878ec81