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NVD / CVE Program· CNA Linux

CVE-2026-90025: usb: typec: ucsi: displayport: Fix OOB altmode array index

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: 0.17% (FIRST EPSS).
  • Someone with local access to the system 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 04cec690b1fd9d1c4c314b91a10d8c68a3acfe18, 1ffed96ef986e2cdf986aa4a4506a5e6dcdf4456, 33a81acd2d1d0667d4eff93cb90339fa53e617e8; 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 04cec690b1fd9d1c4c314b91a10d8c68a3acfe18, 1ffed96ef986e2cdf986aa4a4506a5e6dcdf4456, 33a81acd2d1d0667d4eff93cb90339fa53e617e8; 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: usb: typec: ucsi: displayport: Fix OOB altmode array index The UCSI displayport driver indexes the connector's port altmode array with the GET_CURRENT_CAM response after checking it is not 0xff. The port altmode array is UCSI_MAX_ALTMODES elements long. If the PPM returns an invalid GET_CURRENT_CAM response above UCSI_MAX_ALTMODES and not equal to 0xff, the kernel may crash with an array index OOB error. Update the UCSI displayport driver to verify the current cam is less than UCSI_MAX_ALTMODES before accessing the port altmode array.

HighCVSS 7.7 · v3.1—No exploit Fix available
Published
Sep 16, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 6th percentile
CWE
—

Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CNA vs NVD score

NVD
—
CNA · Linux
7.7
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.

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  • 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-2026-90025

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

    • 5.2affected
    • af8622f6a585d8d82b11cd7987e082861fd0edd3 and later · before 8fde7e4a366184e9a6aa95541e52933a73c00a74affected · git
    • af8622f6a585d8d82b11cd7987e082861fd0edd3 and later · before 83f1abd62cc134700ba92e1e2dc650a49a185497affected · git
    • af8622f6a585d8d82b11cd7987e082861fd0edd3 and later · before 1ffed96ef986e2cdf986aa4a4506a5e6dcdf4456affected · git
    • af8622f6a585d8d82b11cd7987e082861fd0edd3 and later · before 58e0ee293ec5e06cacbe3953ad44042f1473dae9affected · git
    • af8622f6a585d8d82b11cd7987e082861fd0edd3 and later · before ac9f878c468052af6571e8639ab1c3ae040b908faffected · git
    • af8622f6a585d8d82b11cd7987e082861fd0edd3 and later · before 33a81acd2d1d0667d4eff93cb90339fa53e617e8affected · git
    • af8622f6a585d8d82b11cd7987e082861fd0edd3 and later · before bdaaf3074aedce8f1b173cc363d61cff5f6a585faffected · git
    • af8622f6a585d8d82b11cd7987e082861fd0edd3 and later · before 04cec690b1fd9d1c4c314b91a10d8c68a3acfe18affected · git
    • before 5.2not 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-2026-90023Sep 16, 2026 · usb: gadget: f_mass_storage: fix null pointer dereference in fsg_common_set_num_buffers()
    0Monitor
  • ← EarlierCVE-2026-90024Sep 16, 2026 · usb: gadget: midi2: Fix null-pointer dereference in f_midi2_free_ep_reqs
    0Monitor
  • Later →CVE-2026-90026Sep 16, 2026 · usb: typec: qcom-pmic: cancel reset_work on stop
    31Monitor

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 Linux04cec690b1fd9d1c4c314b91a10d8c68a3acfe18Vendor (CNA)
Linux Linux1ffed96ef986e2cdf986aa4a4506a5e6dcdf4456Vendor (CNA)
Linux Linux33a81acd2d1d0667d4eff93cb90339fa53e617e8Vendor (CNA)
Linux Linux58e0ee293ec5e06cacbe3953ad44042f1473dae9Vendor (CNA)
Linux Linux83f1abd62cc134700ba92e1e2dc650a49a185497Vendor (CNA)
Linux Linux8fde7e4a366184e9a6aa95541e52933a73c00a74Vendor (CNA)
Linux Linuxac9f878c468052af6571e8639ab1c3ae040b908fVendor (CNA)
Linux Linuxbdaaf3074aedce8f1b173cc363d61cff5f6a585fVendor (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)
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.

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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

  • Someone with local access to the system 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
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/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 (7 more)

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

All records