RDMA/rvt: Return NULL after port allocation failure (CVE-2026-93104) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-93104

RDMA/rvt: Return NULL after port allocation failure

Answer in brief

CVE-2026-93104 records a Unknown severity vulnerability in RDMA/rvt: Return NULL after port allocation failure. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 17, 2026Updated Sep 17, 2026Source checked Sep 17, 2026First seen by HOL Sep 17, 2026Material review Sep 17, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=ff6acd69518e0a84bd9c9b7f1bd4313f7076db97 <b1e1b25723af44328524c7b54433e4bf0ab9930c \|\| >=ff6acd69518e0a84bd9c9b7f1bd4313f7076db97 <2982eaf3b9d2d953318c74cd6f1b7576ea6d7b1f	b1e1b25723af44328524c7b54433e4bf0ab9930c, 2982eaf3b9d2d953318c74cd6f1b7576ea6d7b1f
Linux/Linuxgeneric	4.6	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to b1e1b25723af44328524c7b54433e4bf0ab9930c if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 17, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: RDMA/rvt: Return NULL after port allocation failure rvt_alloc_device() deallocates the IB device when its port array cannot be allocated but then returns the pointer to the released allocation. Callers treat any non-NULL value as valid and dereference it, resulting in a use-after-free. Return NULL immediately after deallocation so callers can propagate the allocation failure.

Quoted source text, attributed separately from HOL analysis.