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NVD / CVE Program· CNA Linux

CVE-2026-97508: thunderbolt: Set tb->root_switch to NULL when domain is stopped

Noroxi assessment

Priority: Monitor (action score 30/100)

  • 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: 0.22% (FIRST EPSS).
  • Someone on the same network segment can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: Linux Linux 54ad3415cc211ca0d64ae1bf3234d6eb5c6aedd0, 66b0fe27e277713c2b9f3c452c76330ed0bd7eaf, 83d1af5b1b6e6c96ffa633ca2c9a77f6f4c93efa; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes.

Low priority for now. Upgrade to Linux Linux 54ad3415cc211ca0d64ae1bf3234d6eb5c6aedd0, 66b0fe27e277713c2b9f3c452c76330ed0bd7eaf, 83d1af5b1b6e6c96ffa633ca2c9a77f6f4c93efa; 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: Set tb->root_switch to NULL when domain is stopped Similarly what we do with the firmware connection manager. This makes tb_xdp_handle_request() return error to the remote host. However, we need to make sure we keep the uuid alive so that we can reply until the whole domain is released.

HighCVSS 7.5 · v3.1—No exploit Fix available
Published
Sep 24, 2026
Updated
Oct 3, 2026
EPSS
0.2% · 13th percentile
CWE
—

Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CNA vs NVD score

NVD
—
CNA · Linux
7.5
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-2026-97508

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 d9a638e7bc87e0e6fe3a75517ac481e72fc0058caffected · git
    • d1ff70241a275133e1a0258b7c23588b122276c8 and later · before 66b0fe27e277713c2b9f3c452c76330ed0bd7eafaffected · git
    • d1ff70241a275133e1a0258b7c23588b122276c8 and later · before 54ad3415cc211ca0d64ae1bf3234d6eb5c6aedd0affected · git
    • d1ff70241a275133e1a0258b7c23588b122276c8 and later · before 83d1af5b1b6e6c96ffa633ca2c9a77f6f4c93efaaffected · git
    • d1ff70241a275133e1a0258b7c23588b122276c8 and later · before f06e9fbae78a51832211b4495a19412c7d49ecb4affected · git
    • d1ff70241a275133e1a0258b7c23588b122276c8 and later · before 99f019d2e9eb79adc485fef8aa8ada2cd0c843e9affected · git
    • d1ff70241a275133e1a0258b7c23588b122276c8 and later · before e56249d8a68e712f3b60e1f3fdbb5b4fea146468affected · git
    • before 4.15not affected · semver
    • 5.10.271 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-2026-97506Sep 24, 2026 · crypto: ixp4xx - fix buffer chain unwind on allocation failure
    0Monitor
  • ← EarlierCVE-2026-97507Sep 24, 2026 · media: dm1105: fix missing error check for dma_alloc_coherent
    0Monitor
  • Later →CVE-2026-97509Sep 24, 2026 · thunderbolt: Keep XDomain reference during the lifetime of a service
    35Monitor

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 Linux54ad3415cc211ca0d64ae1bf3234d6eb5c6aedd0Vendor (CNA)
Linux Linux66b0fe27e277713c2b9f3c452c76330ed0bd7eafVendor (CNA)
Linux Linux83d1af5b1b6e6c96ffa633ca2c9a77f6f4c93efaVendor (CNA)
Linux Linux99f019d2e9eb79adc485fef8aa8ada2cd0c843e9Vendor (CNA)
Linux Linuxd9a638e7bc87e0e6fe3a75517ac481e72fc0058cVendor (CNA)
Linux Linuxe56249d8a68e712f3b60e1f3fdbb5b4fea146468Vendor (CNA)
Linux Linuxf06e9fbae78a51832211b4495a19412c7d49ecb4Vendor (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.
  • Special conditions such as timing or configuration are required.

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
High
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:H/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