CVE-2026-93103

RDMA/hfi1: Preserve unit 0 on allocation failure

Published Sep 17, 2026 CVSS n/a EPSS < 1% KEV · Not listed

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.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`03b92789e5cfdac66805c1a98f1ec67336199d56`	affected	< 852637d3ee56aed8ea3ee8948eda21eca406c051
`03b92789e5cfdac66805c1a98f1ec67336199d56`	affected	< 3d0e5252b8d0345ef494763ca31e3ddd666e02cb
`03b92789e5cfdac66805c1a98f1ec67336199d56`	affected	< 0feb29d434e6cc0ebefec4f77be014c85ad751b0
`03b92789e5cfdac66805c1a98f1ec67336199d56`	affected	< 3f1e196eb66b8cd3882e373794d6cea46f150a20
`03b92789e5cfdac66805c1a98f1ec67336199d56`	affected	< 4ff9d58d34758e9633078b37e8d5289b513ff80e
`03b92789e5cfdac66805c1a98f1ec67336199d56`	affected	< fd4d3ad5f244a867166d1e2da7ece3d82878ec81
`03b92789e5cfdac66805c1a98f1ec67336199d56`	affected	< 4204f5c0312ba136181a6e148ffa0bfaf95a4cc1
`03b92789e5cfdac66805c1a98f1ec67336199d56`	affected	< 2e3809ad8911f5d5581b3f046bd628417bface76

Linux

affected

Version	Status	Constraints
`5.2`	affected	—
`0`	unaffected	< 5.2
`5.10.270`	unaffected	≤ 5.10.*
`5.15.221`	unaffected	≤ 5.15.*
`6.1.188`	unaffected	≤ 6.1.*
`6.6.157`	unaffected	≤ 6.6.*
`6.12.110`	unaffected	≤ 6.12.*
`6.18.52`	unaffected	≤ 6.18.*
`7.2.6`	unaffected	≤ 7.2.*
`7.3`	unaffected	≤ *

No data.

Vendor Product Versions

Linux

Linux Kernel

Version	Status	Scheme	Platform
`[03b92789e5cfdac66805c1a98f1ec67336199d56,852637d3ee56aed8ea3ee8948eda21eca406c051)`	affected	code_commit	—
`[03b92789e5cfdac66805c1a98f1ec67336199d56,3d0e5252b8d0345ef494763ca31e3ddd666e02cb)`	affected	code_commit	—
`[03b92789e5cfdac66805c1a98f1ec67336199d56,0feb29d434e6cc0ebefec4f77be014c85ad751b0)`	affected	code_commit	—
`[03b92789e5cfdac66805c1a98f1ec67336199d56,3f1e196eb66b8cd3882e373794d6cea46f150a20)`	affected	code_commit	—
`[03b92789e5cfdac66805c1a98f1ec67336199d56,4ff9d58d34758e9633078b37e8d5289b513ff80e)`	affected	code_commit	—
`[03b92789e5cfdac66805c1a98f1ec67336199d56,fd4d3ad5f244a867166d1e2da7ece3d82878ec81)`	affected	code_commit	—
`[03b92789e5cfdac66805c1a98f1ec67336199d56,4204f5c0312ba136181a6e148ffa0bfaf95a4cc1)`	affected	code_commit	—
`[03b92789e5cfdac66805c1a98f1ec67336199d56,2e3809ad8911f5d5581b3f046bd628417bface76)`	affected	code_commit	—

Linux

Linux Kernel

Version	Status	Scheme	Platform
`5.2`	affected	generic	—
`[0,5.2)`	unaffected	semver	—
`[5.10.270,5.11.0]`	unaffected	semver	—
`[5.15.221,5.16.0]`	unaffected	semver	—
`[6.1.188,6.2.0]`	unaffected	semver	—
`[6.6.157,6.7.0]`	unaffected	semver	—
`[6.12.110,6.13.0]`	unaffected	semver	—
`[6.18.52,6.19.0]`	unaffected	semver	—
`[7.2.6,7.3.0]`	unaffected	semver	—
`[7.3-rc1,*]`	unaffected	generic	—

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

Source	ID	Title
Debian DLA	DLA-4817-1	linux-6.12 security update
Debian DLA	DLA-4841-1	linux security update
Debian DSA	DSA-6528-1	linux security update
Ubuntu USN	USN-8961-1	Linux kernel vulnerabilities
Ubuntu USN	USN-9019-1	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-9020-1	Linux kernel vulnerabilities
Ubuntu USN	USN-9022-1	Linux kernel vulnerabilities
Ubuntu USN	USN-9023-1	Linux kernel vulnerabilities
Ubuntu USN	USN-9024-1	Linux kernel vulnerabilities
Ubuntu USN	USN-9025-1	Linux kernel vulnerabilities
Ubuntu USN	USN-9026-1	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-9029-1	Linux kernel (Raspberry Pi) vulnerabilities
Ubuntu USN	USN-9039-1	Linux kernel (Azure CVM) vulnerabilities
Ubuntu USN	USN-9040-1	Linux kernel (Low Latency NVIDIA) vulnerabilities
Ubuntu USN	USN-9066-1	Linux kernel (HWE) vulnerabilities
Ubuntu USN	USN-9091-1	Linux kernel (NVIDIA Tegra) vulnerabilities

Metrics

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.177% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://git.kernel.org/stable/c/0feb29d434e6cc0ebefec4f77be014c85ad751b0
https://git.kernel.org/stable/c/2e3809ad8911f5d5581b3f046bd628417bface76
https://git.kernel.org/stable/c/3d0e5252b8d0345ef494763ca31e3ddd666e02cb
https://git.kernel.org/stable/c/3f1e196eb66b8cd3882e373794d6cea46f150a20
https://git.kernel.org/stable/c/4204f5c0312ba136181a6e148ffa0bfaf95a4cc1
https://git.kernel.org/stable/c/4ff9d58d34758e9633078b37e8d5289b513ff80e
https://git.kernel.org/stable/c/852637d3ee56aed8ea3ee8948eda21eca406c051
https://git.kernel.org/stable/c/fd4d3ad5f244a867166d1e2da7ece3d82878ec81

History

Sep 19, 2026 7:45 AM Weaknesses updated View changes

Type	Values Removed	Values Added
Weaknesses		CWE-665

Sep 17, 2026 4:30 PM Description updated. Title updated. First appearance in the feed. Affected versions updated. Affected vendors updated. Added references View changes

Type	Values Removed	Values 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.
Title		RDMA/hfi1: Preserve unit 0 on allocation failure
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/0feb29d434e6cc0ebefec4f77be014c85ad751b0 https://git.kernel.org/stable/c/2e3809ad8911f5d5581b3f046bd628417bface76 https://git.kernel.org/stable/c/3d0e5252b8d0345ef494763ca31e3ddd666e02cb https://git.kernel.org/stable/c/3f1e196eb66b8cd3882e373794d6cea46f150a20 https://git.kernel.org/stable/c/4204f5c0312ba136181a6e148ffa0bfaf95a4cc1 https://git.kernel.org/stable/c/4ff9d58d34758e9633078b37e8d5289b513ff80e https://git.kernel.org/stable/c/852637d3ee56aed8ea3ee8948eda21eca406c051 https://git.kernel.org/stable/c/fd4d3ad5f244a867166d1e2da7ece3d82878ec81