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NVD / CVE Program· CNA Linux

CVE-2026-97509: thunderbolt: Keep XDomain reference during the lifetime of a service

Noroxi assessment

Priority: Monitor (action score 35/100)

  • 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: 0.23% (FIRST EPSS).
  • Someone on the same network segment 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 57359bb31526c2f1bb0a7b9b69d8b8a6bd3f0e9f, 8ab12d015884b8aa85ea7ed58c5a0bae4264fe60, 8b4060998637f06975fceee9b73845d8672d411e; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes.

Low priority for now. Upgrade to Linux Linux 57359bb31526c2f1bb0a7b9b69d8b8a6bd3f0e9f, 8ab12d015884b8aa85ea7ed58c5a0bae4264fe60, 8b4060998637f06975fceee9b73845d8672d411e; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes 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: thunderbolt: Keep XDomain reference during the lifetime of a service This is needed because we release the service ID in tb_service_release() and the ID array is owned by the parent XDomain.

HighCVSS 8.8 · v3.1—No exploit Fix available
Published
Sep 24, 2026
Updated
Oct 3, 2026
EPSS
0.2% · 15th percentile
CWE
—

Report tools

JSON

Action score

35

Monitor

Low priority for now.

CVSS
35 / 40 · 8.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CNA vs NVD score

NVD
—
CNA · Linux
8.8
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-2026-97509

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

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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.

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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

    • 4.15affected
    • d1ff70241a275133e1a0258b7c23588b122276c8 and later · before a4567e5380e4e46d0ea9a28d2d675e5c6f013d54affected · git
    • d1ff70241a275133e1a0258b7c23588b122276c8 and later · before daeaa6c7211d03ed061b0dd22a875fad9372b090affected · git
    • d1ff70241a275133e1a0258b7c23588b122276c8 and later · before cca72fe513f3d6b1279fe83483f8a8990adbe0c6affected · git
    • d1ff70241a275133e1a0258b7c23588b122276c8 and later · before 57359bb31526c2f1bb0a7b9b69d8b8a6bd3f0e9faffected · git
    • d1ff70241a275133e1a0258b7c23588b122276c8 and later · before 8ab12d015884b8aa85ea7ed58c5a0bae4264fe60affected · git
    • d1ff70241a275133e1a0258b7c23588b122276c8 and later · before ea60ae6233ca0fc0d414e9c11f0d86c63b303fc7affected · git
    • d1ff70241a275133e1a0258b7c23588b122276c8 and later · before 8b4060998637f06975fceee9b73845d8672d411eaffected · git
    • before 4.15not affected · semver
    • 5.10.266 and later · up to and including 5.10.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.190-16.1.190-1
Debian:12linux-6.12before 6.12.111-1~deb12u16.12.111-1~deb12u1
Debian:13linuxbefore 6.12.111-16.12.111-1
Debian:14linuxbefore 7.2.6-17.2.6-1

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-2026-97507Sep 24, 2026 · media: dm1105: fix missing error check for dma_alloc_coherent
    0Monitor
  • ← EarlierCVE-2026-97508Sep 24, 2026 · thunderbolt: Set tb->root_switch to NULL when domain is stopped
    30Monitor
  • Later →CVE-2026-97510Sep 24, 2026 · thunderbolt: Release request if tb_cfg_request() fails in __tb_xdomain_response()
    0Monitor

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 Linux57359bb31526c2f1bb0a7b9b69d8b8a6bd3f0e9fVendor (CNA)
Linux Linux8ab12d015884b8aa85ea7ed58c5a0bae4264fe60Vendor (CNA)
Linux Linux8b4060998637f06975fceee9b73845d8672d411eVendor (CNA)
Linux Linuxa4567e5380e4e46d0ea9a28d2d675e5c6f013d54Vendor (CNA)
Linux Linuxcca72fe513f3d6b1279fe83483f8a8990adbe0c6Vendor (CNA)
Linux Linuxdaeaa6c7211d03ed061b0dd22a875fad9372b090Vendor (CNA)
Linux Linuxea60ae6233ca0fc0d414e9c11f0d86c63b303fc7Vendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
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)

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).

Technical details

Attack conditions

  • Someone on the same network segment 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
Adjacent
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:A/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 (6 more)

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

All records