RDMA/cxgb4: Cancel reg_work before freeing device on remove (CVE-2026-89510) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-89510

RDMA/cxgb4: Cancel reg_work before freeing device on remove

Answer in brief

CVE-2026-89510 records a Unknown severity vulnerability in RDMA/cxgb4: Cancel reg_work before freeing device on remove. 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 11, 2026Updated Sep 11, 2026Source checked Sep 11, 2026First seen by HOL Sep 11, 2026Material review Sep 11, 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	>=1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5 <fe9c591026c576d8b1f72aab5e4cd67350530763 \|\| >=1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5 <85f438382a865a4dc4c50e6b884310bb2b60fc4d \|\| >=1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5 <320e5258a53af0abc5abd9eb01519a48bab2dee8 \|\| >=1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5 <a7100601aa1a39f799a566acce10db20eaf4b7f2	fe9c591026c576d8b1f72aab5e4cd67350530763, 85f438382a865a4dc4c50e6b884310bb2b60fc4d, 320e5258a53af0abc5abd9eb01519a48bab2dee8, a7100601aa1a39f799a566acce10db20eaf4b7f2
Linux/Linuxgeneric	4.15	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to fe9c591026c576d8b1f72aab5e4cd67350530763 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 11, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: RDMA/cxgb4: Cancel reg_work before freeing device on remove c4iw_uld_state_change() queues reg_work to register the RDMA device. c4iw_remove() can free ctx->dev while this work is pending or running, leaving c4iw_register_device() accessing the freed device. Cancel reg_work before removing the device. The registration work can tear down ctx->dev when registration fails, so do not unregister or deallocate it again in that case. This issue was found by an in-house static analysis tool.

Quoted source text, attributed separately from HOL analysis.