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NVD / CVE Program· CNA Linux

CVE-2026-74679: usb: gadget: f_ncm: Use unsigned int for ndp_index

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: 0.18% (FIRST EPSS).
  • Fixed version: Linux Linux 11413d7ed42174b8f5d8d0b6a25d10dc88239b21, 5b2b3a3229a3f4c493ffdee53aee2f173b6f13b3, 6b1c8a9403a26cb0fed7a648916c74dc236da591.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 11413d7ed42174b8f5d8d0b6a25d10dc88239b21, 5b2b3a3229a3f4c493ffdee53aee2f173b6f13b3, 6b1c8a9403a26cb0fed7a648916c74dc236da591 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: f_ncm: Use unsigned int for ndp_index The variable ndp_index is declared as a signed integer, but it stores the return value of get_ncm(), which is unsigned. A malicious host can supply a large offset that overflows the signed ndp_index, making it negative. Because ndp_index is compared against unsigned bounds, this negative value bypasses sanity checks and leads to an out-of-bounds read when calculating the address of the NDP block (ntb_ptr + ndp_index). Fix this by changing ndp_index to unsigned int to ensure consistent unsigned comparisons throughout the function.

—No exploit Fix available
Published
Aug 22, 2026
Updated
Oct 14, 2026
EPSS
0.1% · 8th 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 · 0.1%

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

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  • when exploit code appears or is weaponized
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  • 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

    • 3.17affected
    • 370af734dfaf8336b496b386e194648e097e248a and later · before 9c8c6825a750fcd3efbe922847ca70ccd5a66857affected · git
    • 370af734dfaf8336b496b386e194648e097e248a and later · before a1c0deeba4a46481543d6b09c665f758c54c3a1aaffected · git
    • 370af734dfaf8336b496b386e194648e097e248a and later · before d13f650a3485b58c124b3cda45597e8002c9c833affected · git
    • 370af734dfaf8336b496b386e194648e097e248a and later · before 11413d7ed42174b8f5d8d0b6a25d10dc88239b21affected · git
    • 370af734dfaf8336b496b386e194648e097e248a and later · before 5b2b3a3229a3f4c493ffdee53aee2f173b6f13b3affected · git
    • 370af734dfaf8336b496b386e194648e097e248a and later · before d328fdc607fa1bb668ad512e1c918a120f78f337affected · git
    • 370af734dfaf8336b496b386e194648e097e248a and later · before fc9e54e22845c4da29588ca0986cb7c795b5a262affected · git
    • 370af734dfaf8336b496b386e194648e097e248a and later · before 6b1c8a9403a26cb0fed7a648916c74dc236da591affected · 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

Published before and after this one in the same product

  • ← EarlierCVE-2026-74677Aug 22, 2026 · net: usb: ipheth: fix carrier_work UAF on disconnect
    0Monitor
  • ← EarlierCVE-2026-74678Aug 22, 2026 · net: usb: ax88179_178a: fix skb leak in ax88179_tx_fixup()
    30Monitor
  • Later →CVE-2026-74680Aug 22, 2026 · usb: atm: cxacru: properly kill rcv_urb on error in cxacru_cm()
    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 Linux11413d7ed42174b8f5d8d0b6a25d10dc88239b21Vendor (CNA)
Linux Linux5b2b3a3229a3f4c493ffdee53aee2f173b6f13b3Vendor (CNA)
Linux Linux6b1c8a9403a26cb0fed7a648916c74dc236da591Vendor (CNA)
Linux Linux9c8c6825a750fcd3efbe922847ca70ccd5a66857Vendor (CNA)
Linux Linuxa1c0deeba4a46481543d6b09c665f758c54c3a1aVendor (CNA)
Linux Linuxd13f650a3485b58c124b3cda45597e8002c9c833Vendor (CNA)
Linux Linuxd328fdc607fa1bb668ad512e1c918a120f78f337Vendor (CNA)
Linux Linuxfc9e54e22845c4da29588ca0986cb7c795b5a262Vendor (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✗ → ✓

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References

Show all references (7 more)

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

All records