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NVD / CVE Program· CNA Linux

CVE-2026-93103: RDMA/hfi1: Preserve unit 0 on allocation failure

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.17% (FIRST EPSS).
  • Fixed version: Linux Linux 0feb29d434e6cc0ebefec4f77be014c85ad751b0, 2e3809ad8911f5d5581b3f046bd628417bface76, 3d0e5252b8d0345ef494763ca31e3ddd666e02cb; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1.

Low priority for now. Upgrade to Linux Linux 0feb29d434e6cc0ebefec4f77be014c85ad751b0, 2e3809ad8911f5d5581b3f046bd628417bface76, 3d0e5252b8d0345ef494763ca31e3ddd666e02cb; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

—No exploit Fix available
Published
Sep 17, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 7th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

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  • when exploit code appears or is weaponized
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  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 5.2affected
    • 03b92789e5cfdac66805c1a98f1ec67336199d56 and later · before 852637d3ee56aed8ea3ee8948eda21eca406c051affected · git
    • 03b92789e5cfdac66805c1a98f1ec67336199d56 and later · before 3d0e5252b8d0345ef494763ca31e3ddd666e02cbaffected · git
    • 03b92789e5cfdac66805c1a98f1ec67336199d56 and later · before 0feb29d434e6cc0ebefec4f77be014c85ad751b0affected · git
    • 03b92789e5cfdac66805c1a98f1ec67336199d56 and later · before 3f1e196eb66b8cd3882e373794d6cea46f150a20affected · git
    • 03b92789e5cfdac66805c1a98f1ec67336199d56 and later · before 4ff9d58d34758e9633078b37e8d5289b513ff80eaffected · git
    • 03b92789e5cfdac66805c1a98f1ec67336199d56 and later · before fd4d3ad5f244a867166d1e2da7ece3d82878ec81affected · git
    • 03b92789e5cfdac66805c1a98f1ec67336199d56 and later · before 4204f5c0312ba136181a6e148ffa0bfaf95a4cc1affected · git
    • 03b92789e5cfdac66805c1a98f1ec67336199d56 and later · before 2e3809ad8911f5d5581b3f046bd628417bface76affected · git
    • before 5.2not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.190-16.1.190-1
Debian:12linux-6.12before 6.12.111-1~deb12u16.12.111-1~deb12u1
Debian:13linuxbefore 6.12.111-16.12.111-1
Debian:14linuxbefore 7.2.6-17.2.6-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-93101Sep 17, 2026 · media: v4l2-async: Unregister sub-device if asc_list is empty
    0Monitor
  • ← EarlierCVE-2026-93102Sep 17, 2026 · RDMA/hfi1: Free RX data on late probe failure
    0Monitor
  • Later →CVE-2026-93104Sep 17, 2026 · RDMA/rvt: Return NULL after port allocation failure
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux0feb29d434e6cc0ebefec4f77be014c85ad751b0Vendor (CNA)
Linux Linux2e3809ad8911f5d5581b3f046bd628417bface76Vendor (CNA)
Linux Linux3d0e5252b8d0345ef494763ca31e3ddd666e02cbVendor (CNA)
Linux Linux3f1e196eb66b8cd3882e373794d6cea46f150a20Vendor (CNA)
Linux Linux4204f5c0312ba136181a6e148ffa0bfaf95a4cc1Vendor (CNA)
Linux Linux4ff9d58d34758e9633078b37e8d5289b513ff80eVendor (CNA)
Linux Linux852637d3ee56aed8ea3ee8948eda21eca406c051Vendor (CNA)
Linux Linuxfd4d3ad5f244a867166d1e2da7ece3d82878ec81Vendor (CNA)
azl3 kernel 6.6.150.1-1 on Azure Linux 3.0—Microsoft (MSRC)
azl3 kernel 6.6.152.1-1 on Azure Linux 3.06.6.157.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.190-1 · Debian:12Package registry (OSV)
debian:linux6.12.111-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.111-1~deb12u1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

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References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records