RDMA/erdma: Hold QP references for AE and CM processing (CVE-2026-90308) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-90308

RDMA/erdma: Hold QP references for AE and CM processing

Answer in brief

CVE-2026-90308 records a Unknown severity vulnerability in RDMA/erdma: Hold QP references for AE and CM processing. 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	>=155055771704f8cbb5c176a4309b7dc30a50450c <6e32f84b63c054e09392153125d7202abab2d14b \|\| >=155055771704f8cbb5c176a4309b7dc30a50450c <ec987c0654651036dad6a42f7fa2a6d7c16a3687 \|\| >=155055771704f8cbb5c176a4309b7dc30a50450c <c92686867638cda954fdb2bdbac8a75e3aa6eaae \|\| >=155055771704f8cbb5c176a4309b7dc30a50450c <a52eeff32024f190b3bdc99088c7becccd4fa60b	6e32f84b63c054e09392153125d7202abab2d14b, ec987c0654651036dad6a42f7fa2a6d7c16a3687, c92686867638cda954fdb2bdbac8a75e3aa6eaae, a52eeff32024f190b3bdc99088c7becccd4fa60b
Linux/Linuxgeneric	6.0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 6e32f84b63c054e09392153125d7202abab2d14b 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/erdma: Hold QP references for AE and CM processing AE QP fatal events and iWARP CM paths load QPs from dev->qp_xa and then use or reference them outside the xarray lock. erdma_destroy_qp() can drop the destroy-path reference and free QP resources while such a lookup is in flight. Add erdma_qp_get_by_qpn() to acquire a kref under the xarray lock with kref_get_unless_zero(). Remove the QP from the xarray before dropping the destroy-path reference so no new lookup can acquire it while destruction waits for existing users.

Quoted source text, attributed separately from HOL analysis.