Skip to content
Noroxi
CVE-2026-74585· NVD / CVE Program· CNA Linux

thunderbolt: Bound the DROM dual link port number before indexing sw->ports

In the Linux kernel, the following vulnerability has been resolved: thunderbolt: Bound the DROM dual link port number before indexing sw->ports tb_drom_parse_entry_port() validates the device-supplied header->index against sw->config.max_port_number before indexing sw->ports[], but the sibling field entry->dual_link_port_nr -- a 6-bit value also read from the DROM -- indexes the same array with no such check. A malicious or malformed Thunderbolt device can set dual_link_port_nr beyond the allocated sw->ports[] (max_port_number + 1 entries), producing an out-of-bounds tb_port pointer that is stored and later dereferenced. Reject a port entry whose dual_link_port_nr exceeds max_port_number, the same bound already applied to header->index.

—No exploit Fix available
Published
Aug 22, 2026
Updated
Aug 22, 2026
EPSS
0.2% · 11th percentile
CWE
—
Follow this CVE

Sign in to follow · You’ll be notified if a followed record enters KEV, gets an exploit or is updated.

Report tools

JSON

Action score

0

Monitor

Low priority for now.

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

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Affected systems

—

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

    • 3.17affected
    • cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6 and later · before 6c892ed9f4129ae40ef0f92e1bb31aa0b0ddc72caffected · git
    • cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6 and later · before 3d3c212b70633332ab71672aa2bc6af257d2ec83affected · git
    • cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6 and later · before b98e1e28bd95b0fa33164eec1e763d26c7058b39affected · git
    • cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6 and later · before 50f0c8dd8c3390f851cfb97ca13116f9ee6469d1affected · git
    • cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6 and later · before f28066057134aa9294caa597b670daf505ad9dceaffected · git
    • cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6 and later · before 40d2ffb74094cf36edbe05855566a4c58b6ce808affected · git
    • cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6 and later · before f32c3a9a77cfb50934a60b05d5407649af062535affected · git
    • cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6 and later · before d6764992f17b23d91ff93ce905ab53c2aa7191f0affected · git
    • before 3.17not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.187-16.1.187-1
Debian:12linux-6.12before 6.12.107-1~deb12u16.12.107-1~deb12u1
Debian:13linuxbefore 6.12.105-16.12.105-1
Debian:14linuxbefore 7.1.9-17.1.9-1

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
  • CVE-2026-74309vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
    40Plan
  • CVE-2026-74280crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
    40Plan
  • CVE-2026-74279crypto: cavium/cpt - fix DMA cleanup using wrong loop index
    40Plan

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 Linux3d3c212b70633332ab71672aa2bc6af257d2ec83Vendor (CNA)
Linux Linux40d2ffb74094cf36edbe05855566a4c58b6ce808Vendor (CNA)
Linux Linux50f0c8dd8c3390f851cfb97ca13116f9ee6469d1Vendor (CNA)
Linux Linux6c892ed9f4129ae40ef0f92e1bb31aa0b0ddc72cVendor (CNA)
Linux Linuxb98e1e28bd95b0fa33164eec1e763d26c7058b39Vendor (CNA)
Linux Linuxd6764992f17b23d91ff93ce905ab53c2aa7191f0Vendor (CNA)
Linux Linuxf28066057134aa9294caa597b670daf505ad9dceVendor (CNA)
Linux Linuxf32c3a9a77cfb50934a60b05d5407649af062535Vendor (CNA)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.107-1~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).

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

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

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

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

All records