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NVD / CVE Program· CNA Linux

CVE-2026-80826: USB: c67x00: fix use-after-free in c67x00_add_iso_urb()

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: 0.19% (FIRST EPSS).
  • Fixed version: Linux Linux 62cd519ab74cac499036cd88c11692f8f0d53e14, 7983daa159981fac125db2457437723f38ea1472, ade18b4ce78a16558f4f435aece80082f6f7b64c; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1.

Low priority for now. Upgrade to Linux Linux 62cd519ab74cac499036cd88c11692f8f0d53e14, 7983daa159981fac125db2457437723f38ea1472, ade18b4ce78a16558f4f435aece80082f6f7b64c; 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: c67x00: fix use-after-free in c67x00_add_iso_urb() When TD creation fails for the last packet of an isochronous URB, c67x00_add_iso_urb() gives the URB back before updating the endpoint scheduling state. c67x00_giveback_urb() frees the URB private data, and the completion callback may release the final URB reference. The following accesses to urbp->ep_data, urb->interval, and urbp->cnt can therefore use freed memory. Update next_frame and cnt before giving back the failed final packet, making the giveback the last operation that uses the URB and its private data.

—No exploit Fix available
Published
Sep 4, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 9th 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 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

    • 2.6.26affected
    • e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d and later · before e4039e9bebb528dd9cd7ac72aeaec529c26c355aaffected · git
    • e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d and later · before ade18b4ce78a16558f4f435aece80082f6f7b64caffected · git
    • e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d and later · before bb572801290e25ec1c4753d14af35777303f5d6baffected · git
    • e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d and later · before 62cd519ab74cac499036cd88c11692f8f0d53e14affected · git
    • e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d and later · before ff172092cba7ec990ecc7b610ce703e19570b8f0affected · git
    • e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d and later · before b4cb8081cf80f82e48fbe9c021a8f6d0fa2ed421affected · git
    • e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d and later · before 7983daa159981fac125db2457437723f38ea1472affected · git
    • e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d and later · before f24dcc61bd0ecf7639fac5bf700450b398d793a7affected · git
    • e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d and later · before b1e24de475bf2d66fffc9103f3444b783527d55aaffected · git

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 6.12.111-1~deb12u16.12.111-1~deb12u1
Debian:13linuxbefore 6.12.111-16.12.111-1
Debian:14linuxbefore 7.1.13-17.1.13-1

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-2026-80824Sep 4, 2026 · usb: usbfs: fix use-after-free of usb_device in usbdev_release()
    0Monitor
  • ← EarlierCVE-2026-80825Sep 4, 2026 · wifi: mt76: mt7925: ensure tx headroom in usb_sdio_tx_prepare_skb
    0Monitor
  • Later →CVE-2026-80827Sep 4, 2026 · USB: serial: option: fix slab OOB read in interrupt URB callback
    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 Linux62cd519ab74cac499036cd88c11692f8f0d53e14Vendor (CNA)
Linux Linux7983daa159981fac125db2457437723f38ea1472Vendor (CNA)
Linux Linuxade18b4ce78a16558f4f435aece80082f6f7b64cVendor (CNA)
Linux Linuxb1e24de475bf2d66fffc9103f3444b783527d55aVendor (CNA)
Linux Linuxb4cb8081cf80f82e48fbe9c021a8f6d0fa2ed421Vendor (CNA)
Linux Linuxbb572801290e25ec1c4753d14af35777303f5d6bVendor (CNA)
Linux Linuxe4039e9bebb528dd9cd7ac72aeaec529c26c355aVendor (CNA)
Linux Linuxf24dcc61bd0ecf7639fac5bf700450b398d793a7Vendor (CNA)
Linux Linuxff172092cba7ec990ecc7b610ce703e19570b8f0Vendor (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:linux6.1.187-1 · Debian:12Package 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).

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 (8 more)

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

All records