Skip to content
Noroxi
NVD / CVE Program· CNA Linux

CVE-2026-89970: nvmet-auth: Synchronize timeout work during SQ teardown

Noroxi assessment

Priority: Monitor (action score 39/100)

  • 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: 0.80% (FIRST EPSS); higher than 56.5% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 664022fa1c93f4eba09ef5ee02411b9709dd7a93, 7555ddd60af72df2862dd8f9b730a9848577edda, c17c87bde6d6f5252a6a6f0a94b2430164aa28d5; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 664022fa1c93f4eba09ef5ee02411b9709dd7a93, 7555ddd60af72df2862dd8f9b730a9848577edda, c17c87bde6d6f5252a6a6f0a94b2430164aa28d5; 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: 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.

CriticalCVSS 9.8 · v3.1—No exploit Fix available
Published
Sep 16, 2026
Updated
Oct 19, 2026
EPSS
0.8% · 56th percentile
CWE
—

Report tools

JSON

Action score

39

Monitor

Low priority for now.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.8%

CNA vs NVD score

NVD
—
CNA · Linux
9.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-89970

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for linux records

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

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.

We use this product, ask for help

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

    • 6.0affected
    • 1a70200f404ae210b4f0334e3936e84f8edb6bc8 and later · before 664022fa1c93f4eba09ef5ee02411b9709dd7a93affected · git
    • 1a70200f404ae210b4f0334e3936e84f8edb6bc8 and later · before c3c126a6142a1335bc8c34a5607c39cf01daf295affected · git
    • 1a70200f404ae210b4f0334e3936e84f8edb6bc8 and later · before c17c87bde6d6f5252a6a6f0a94b2430164aa28d5affected · git
    • 1a70200f404ae210b4f0334e3936e84f8edb6bc8 and later · before 7555ddd60af72df2862dd8f9b730a9848577eddaaffected · git
    • 1a70200f404ae210b4f0334e3936e84f8edb6bc8 and later · before eb4f9127a2b8a152743f1ee597627e2f69cb54feaffected · git
    • 1a70200f404ae210b4f0334e3936e84f8edb6bc8 and later · before eaa948c0e19b1bb2d93262207bca0c3d19cc3406affected · git
    • before 6.0not affected · semver
    • 6.1.188 and later · up to and including 6.1.*not affected · semver
    • 6.6.157 and later · up to and including 6.6.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:10kernelbefore 6.12.0-211.65.1.el10_26.12.0-211.65.1.el10_2
AlmaLinux:10kernel-64kbefore 6.12.0-211.65.1.el10_26.12.0-211.65.1.el10_2
AlmaLinux:10kernel-64k-corebefore 6.12.0-211.65.1.el10_26.12.0-211.65.1.el10_2
AlmaLinux:10kernel-64k-debugbefore 6.12.0-211.65.1.el10_26.12.0-211.65.1.el10_2
AlmaLinux:10kernel-64k-debug-corebefore 6.12.0-211.65.1.el10_26.12.0-211.65.1.el10_2
AlmaLinux:10kernel-64k-debug-develbefore 6.12.0-211.65.1.el10_26.12.0-211.65.1.el10_2
AlmaLinux:10kernel-64k-debug-devel-matchedbefore 6.12.0-211.65.1.el10_26.12.0-211.65.1.el10_2
AlmaLinux:10kernel-64k-debug-modulesbefore 6.12.0-211.65.1.el10_26.12.0-211.65.1.el10_2
AlmaLinux:10kernel-64k-debug-modules-corebefore 6.12.0-211.65.1.el10_26.12.0-211.65.1.el10_2
AlmaLinux:10kernel-64k-debug-modules-extrabefore 6.12.0-211.65.1.el10_26.12.0-211.65.1.el10_2
AlmaLinux:10kernel-64k-develbefore 6.12.0-211.65.1.el10_26.12.0-211.65.1.el10_2
AlmaLinux:10kernel-64k-devel-matchedbefore 6.12.0-211.65.1.el10_26.12.0-211.65.1.el10_2
AlmaLinux:10kernel-64k-modulesbefore 6.12.0-211.65.1.el10_26.12.0-211.65.1.el10_2
AlmaLinux:10kernel-64k-modules-corebefore 6.12.0-211.65.1.el10_26.12.0-211.65.1.el10_2
AlmaLinux:10kernel-64k-modules-extrabefore 6.12.0-211.65.1.el10_26.12.0-211.65.1.el10_2
AlmaLinux:10kernel-abi-stablelistsbefore 6.12.0-211.65.1.el10_26.12.0-211.65.1.el10_2
AlmaLinux:10kernel-corebefore 6.12.0-211.65.1.el10_26.12.0-211.65.1.el10_2
AlmaLinux:10kernel-cross-headersbefore 6.12.0-211.65.1.el10_26.12.0-211.65.1.el10_2
AlmaLinux:10kernel-debugbefore 6.12.0-211.65.1.el10_26.12.0-211.65.1.el10_2
AlmaLinux:10kernel-debug-corebefore 6.12.0-211.65.1.el10_26.12.0-211.65.1.el10_2
AlmaLinux:10kernel-debug-develbefore 6.12.0-211.65.1.el10_26.12.0-211.65.1.el10_2
AlmaLinux:10kernel-debug-devel-matchedbefore 6.12.0-211.65.1.el10_26.12.0-211.65.1.el10_2
AlmaLinux:10kernel-debug-modulesbefore 6.12.0-211.65.1.el10_26.12.0-211.65.1.el10_2
AlmaLinux:10kernel-debug-modules-corebefore 6.12.0-211.65.1.el10_26.12.0-211.65.1.el10_2

+96

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-2026-89968Sep 16, 2026 · nvmet-tcp: reject unsolicited H2CData PDUs
    30Monitor
  • ← EarlierCVE-2026-89969Sep 16, 2026 · nvmet-tcp: fix out-of-bounds write when receiving an over-long PDU
    39Monitor
  • Later →CVE-2026-89971Sep 16, 2026 · nvme: skip the zoned limits update if the zone info query failed
    30Monitor

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 Linux664022fa1c93f4eba09ef5ee02411b9709dd7a93Vendor (CNA)
Linux Linux7555ddd60af72df2862dd8f9b730a9848577eddaVendor (CNA)
Linux Linuxc17c87bde6d6f5252a6a6f0a94b2430164aa28d5Vendor (CNA)
Linux Linuxc3c126a6142a1335bc8c34a5607c39cf01daf295Vendor (CNA)
Linux Linuxeaa948c0e19b1bb2d93262207bca0c3d19cc3406Vendor (CNA)
Linux Linuxeb4f9127a2b8a152743f1ee597627e2f69cb54feVendor (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)
almalinux:kernel6.12.0-211.65.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k6.12.0-211.65.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-core6.12.0-211.65.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-debug6.12.0-211.65.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-debug-core6.12.0-211.65.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-debug-devel6.12.0-211.65.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-debug-devel-matched6.12.0-211.65.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-debug-modules6.12.0-211.65.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-debug-modules-core6.12.0-211.65.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-debug-modules-extra6.12.0-211.65.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-devel6.12.0-211.65.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-devel-matched6.12.0-211.65.1.el10_2 · AlmaLinux:10Package registry (OSV)
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)
red hat:kernel-64k-debug-debuginfo0:6.12.0-211.65.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-64k-debug-devel0:6.12.0-211.65.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-64k-debug-devel-matched0:6.12.0-211.65.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-64k-debuginfo0:6.12.0-211.65.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-64k-devel0:6.12.0-211.65.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-64k-devel-matched0:6.12.0-211.65.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-debug-debuginfo0:6.12.0-211.65.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)

+6

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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

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✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (5 more)

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

All records