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NVD / CVE Program· CNA Linux

CVE-2026-90019: usb: gadget: fix null pointer dereference in usb_put_function_instance()

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 0fc54a00954f9f4c3e3d4ffa64a530685d99a39b, 3a9691fff79bcce95338435599df6d3ae433cfdc, 5117f236e9e30744338b425395d55913c4500897; 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 0fc54a00954f9f4c3e3d4ffa64a530685d99a39b, 3a9691fff79bcce95338435599df6d3ae433cfdc, 5117f236e9e30744338b425395d55913c4500897; 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 usb_put_function_instance() usb_put_function_instance() attempts to dereference fd inside fi struct to get mod in uvc_alloc_inst() error path. However, fd is not allocated until later in try_get_usb_function_instance() after allocating fi in uvc_alloc_inst() and thus guranteed to be null in error path. Fix this by adding a null check for fi->fd that returns if fd is null.

—No exploit Fix available
Published
Sep 16, 2026
Updated
Oct 19, 2026
EPSS
0.2% · 12th 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

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-90019

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

    • 3.9affected
    • 0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2 and later · before 0fc54a00954f9f4c3e3d4ffa64a530685d99a39baffected · git
    • 0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2 and later · before 6e6736c049683380f5e20becde498986e9293ca4affected · git
    • 0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2 and later · before 3a9691fff79bcce95338435599df6d3ae433cfdcaffected · git
    • 0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2 and later · before 7a4f4ca7ff32ae24807c83e2a06d62b13378d53caffected · git
    • 0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2 and later · before 6ea3a073ca97716d4a73df49a3bec1c3ccf8e2a0affected · git
    • 0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2 and later · before d3a7fa61997db3bf6dadef4c1bd87a4fa782a817affected · git
    • 0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2 and later · before 5117f236e9e30744338b425395d55913c4500897affected · git
    • 0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2 and later · before 6e74ac5c596fd246e37eadfc354567179ccbe9aaaffected · git
    • before 3.9not 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-2026-90017Sep 16, 2026 · staging: rtl8723bs: fix OOB read in rtw_action_frame_parse()
    28Monitor
  • ← EarlierCVE-2026-90018Sep 16, 2026 · staging: rtl8723bs: fix OOB read / stack overflow in rtw_get_wps_attr()
    35Monitor
  • Later →CVE-2026-90020Sep 16, 2026 · USB: gadget: fix NULL pointer dereference in gadget_dev_ioctl()
    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 Linux0fc54a00954f9f4c3e3d4ffa64a530685d99a39bVendor (CNA)
Linux Linux3a9691fff79bcce95338435599df6d3ae433cfdcVendor (CNA)
Linux Linux5117f236e9e30744338b425395d55913c4500897Vendor (CNA)
Linux Linux6e6736c049683380f5e20becde498986e9293ca4Vendor (CNA)
Linux Linux6e74ac5c596fd246e37eadfc354567179ccbe9aaVendor (CNA)
Linux Linux6ea3a073ca97716d4a73df49a3bec1c3ccf8e2a0Vendor (CNA)
Linux Linux7a4f4ca7ff32ae24807c83e2a06d62b13378d53cVendor (CNA)
Linux Linuxd3a7fa61997db3bf6dadef4c1bd87a4fa782a817Vendor (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✗ → ✓

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References

Show all references (7 more)

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

All records