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NVD / CVE Program· CNA Linux

CVE-2026-90020: USB: gadget: fix NULL pointer dereference in gadget_dev_ioctl()

Noroxi assessment

Priority: Monitor (action score 0/100)

  • 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: 0.21% (FIRST EPSS).
  • Fixed version: Linux Linux 162178ca83c3de986900385a0477eb539f8e1a7e, 64ec019bf9a8b12f53b9f2777d65aadb730b5a84, 87cbf9410b12f5c2d659bb01e8ecf6517cb9f28c; 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 162178ca83c3de986900385a0477eb539f8e1a7e, 64ec019bf9a8b12f53b9f2777d65aadb730b5a84, 87cbf9410b12f5c2d659bb01e8ecf6517cb9f28c; 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: gadget: fix NULL pointer dereference in gadget_dev_ioctl() gadget_dev_ioctl() reads dev->gadget before acquiring dev->lock, but dev->state is checked after acquiring the lock. Therefore a concurrent bind can change the device state between these operations, which can leave ioctl with a stale NULL gadget pointer and causing a NULL pointer dereference at gadget->ops->ioctl. Read dev->gadget while holding dev->lock so that the gadget pointer and device state are sampled consistently.

—No exploit Fix available
Published
Sep 16, 2026
Updated
Oct 19, 2026
EPSS
0.2% · 11th percentile
CWE
—

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%

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

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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

    • 2.6.12affected
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 8be30959be31b4205e3bdd2e2a6221f3a2ee7ea1affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before e8219accce2f6d3502ed71f5b5e854ecf27249a6affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 87cbf9410b12f5c2d659bb01e8ecf6517cb9f28caffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 162178ca83c3de986900385a0477eb539f8e1a7eaffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before ebd916fdfefaacbc0e577f7037ec96b31a105e5faffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before c29a83c1ff3f06d5751f6d365b606c9f81ccc4cbaffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 64ec019bf9a8b12f53b9f2777d65aadb730b5a84affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before dd0eed9e165b1a6292f49e622e3dd0b7d99b106daffected · git
    • before 2.6.12not 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-2026-90018Sep 16, 2026 · staging: rtl8723bs: fix OOB read / stack overflow in rtw_get_wps_attr()
    35Monitor
  • ← EarlierCVE-2026-90019Sep 16, 2026 · usb: gadget: fix null pointer dereference in usb_put_function_instance()
    0Monitor
  • Later →CVE-2026-90021Sep 16, 2026 · usb: gadget: f_midi: initialize work in f_midi_alloc()
    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 Linux162178ca83c3de986900385a0477eb539f8e1a7eVendor (CNA)
Linux Linux64ec019bf9a8b12f53b9f2777d65aadb730b5a84Vendor (CNA)
Linux Linux87cbf9410b12f5c2d659bb01e8ecf6517cb9f28cVendor (CNA)
Linux Linux8be30959be31b4205e3bdd2e2a6221f3a2ee7ea1Vendor (CNA)
Linux Linuxc29a83c1ff3f06d5751f6d365b606c9f81ccc4cbVendor (CNA)
Linux Linuxdd0eed9e165b1a6292f49e622e3dd0b7d99b106dVendor (CNA)
Linux Linuxe8219accce2f6d3502ed71f5b5e854ecf27249a6Vendor (CNA)
Linux Linuxebd916fdfefaacbc0e577f7037ec96b31a105e5fVendor (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.

—

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

Show all references (7 more)

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

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