nvmet-auth: Synchronize timeout work during SQ teardown (CVE-2026-89970) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-89970

nvmet-auth: Synchronize timeout work during SQ teardown

Answer in brief

CVE-2026-89970 records a Unknown severity vulnerability in nvmet-auth: Synchronize timeout work during SQ teardown. 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 16, 2026Updated Sep 16, 2026Source checked Sep 16, 2026First seen by HOL Sep 16, 2026Material review Sep 16, 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	>=1a70200f404ae210b4f0334e3936e84f8edb6bc8 <664022fa1c93f4eba09ef5ee02411b9709dd7a93 \|\| >=1a70200f404ae210b4f0334e3936e84f8edb6bc8 <c3c126a6142a1335bc8c34a5607c39cf01daf295 \|\| >=1a70200f404ae210b4f0334e3936e84f8edb6bc8 <c17c87bde6d6f5252a6a6f0a94b2430164aa28d5 \|\| >=1a70200f404ae210b4f0334e3936e84f8edb6bc8 <7555ddd60af72df2862dd8f9b730a9848577edda \|\| >=1a70200f404ae210b4f0334e3936e84f8edb6bc8 <eb4f9127a2b8a152743f1ee597627e2f69cb54fe \|\| >=1a70200f404ae210b4f0334e3936e84f8edb6bc8 <eaa948c0e19b1bb2d93262207bca0c3d19cc3406	664022fa1c93f4eba09ef5ee02411b9709dd7a93, c3c126a6142a1335bc8c34a5607c39cf01daf295, c17c87bde6d6f5252a6a6f0a94b2430164aa28d5, 7555ddd60af72df2862dd8f9b730a9848577edda, eb4f9127a2b8a152743f1ee597627e2f69cb54fe, eaa948c0e19b1bb2d93262207bca0c3d19cc3406
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 664022fa1c93f4eba09ef5ee02411b9709dd7a93 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 16, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: nvmet-auth: Synchronize timeout work during SQ teardown nvmet_auth_sq_free() cancels auth_expired_work with cancel_delayed_work(). If the work has already started, cancellation does not wait for the callback. Transport teardown can consequently free or reuse the queue containing struct nvmet_sq while nvmet_auth_expired_work() still accesses that SQ. Add a teardown-specific helper that synchronously drains the delayed work before freeing authentication state, and use it from nvmet_sq_destroy(). Keep the non-synchronous helper for in-band authentication state cleanup, where the SQ owner remains alive.

Quoted source text, attributed separately from HOL analysis.