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CVE.org (no NVD analysis yet)· CNA Linux

CVE-2026-98772: USB: serial: fix port tear down use-after-free

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: 0.17% (FIRST EPSS).
  • Fixed version: Linux Linux 33c920f7c5952dfc42d1b8ea6efe16b1f0bb0c5b, 5e8980a81af195c49084be5b4c031085b56c7443, 60cc9379c3e650d1ebfba4de63f1242537a62a32; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.159.1-1 on Azure Linux 3.0 Release Notes.

Low priority for now. Upgrade to Linux Linux 33c920f7c5952dfc42d1b8ea6efe16b1f0bb0c5b, 5e8980a81af195c49084be5b4c031085b56c7443, 60cc9379c3e650d1ebfba4de63f1242537a62a32; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.159.1-1 on Azure Linux 3.0 Release Notes 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: serial: fix port tear down use-after-free Some drivers for multiport devices access port driver data from completion handlers of shared URBs submitted at attach() or first open() and stopped at disconnect() or last close(), respectively. A simple NULL check before accessing the driver data makes sure that a port state container has at least been allocated, but a completion handler can still race with port tear down. Reorder the disconnect handling so that ports are not deregistered (and their driver data freed) until after all ports have been hung up and the driver disconnect() callback has run so that all I/O has been stopped.

—No exploit Fix available
Published
Oct 18, 2026
Updated
Oct 30, 2026
EPSS
0.1% · 7th 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

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

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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

    • 2.6.30affected
    • 2d93148ab6988cad872e65d694c95e8944e1b626 and later · before 8ed69d299b9d7872f911f089e00cdd2ea6969d2caffected · git
    • 2d93148ab6988cad872e65d694c95e8944e1b626 and later · before bf296d7b75bfd49dc519ad0406e89ddc5c3f02e3affected · git
    • 2d93148ab6988cad872e65d694c95e8944e1b626 and later · before 94601d83fc4811485ca6fb1d50bece589fe1c24daffected · git
    • 2d93148ab6988cad872e65d694c95e8944e1b626 and later · before e4a6883ad9b4686a5f4bd90ff55a44d7ab65bd3caffected · git
    • 2d93148ab6988cad872e65d694c95e8944e1b626 and later · before 60cc9379c3e650d1ebfba4de63f1242537a62a32affected · git
    • 2d93148ab6988cad872e65d694c95e8944e1b626 and later · before 5e8980a81af195c49084be5b4c031085b56c7443affected · git
    • 2d93148ab6988cad872e65d694c95e8944e1b626 and later · before e80ee74206f260eb1282e7d1339ff146a4a410d0affected · git
    • 2d93148ab6988cad872e65d694c95e8944e1b626 and later · before 33c920f7c5952dfc42d1b8ea6efe16b1f0bb0c5baffected · git
    • before 2.6.30not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxfrom 0—
Debian:12linux-6.12before 6.12.113-1~deb12u16.12.113-1~deb12u1
Debian:13linuxbefore 6.12.113-16.12.113-1
Debian:14linuxbefore 7.2.10-17.2.10-1

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-2026-98770Oct 18, 2026 · usb: gadget: midi2: Fix the jack descriptor array sizes
    0Monitor
  • ← EarlierCVE-2026-98771Oct 18, 2026 · usb: storage: sierra_ms: reject short SWoC info transfers
    0Monitor
  • Later →CVE-2026-98773Oct 18, 2026 · USB: cdc-acm: skip URB restart in port_shutdown if disconnected
    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 Linux33c920f7c5952dfc42d1b8ea6efe16b1f0bb0c5bVendor (CNA)
Linux Linux5e8980a81af195c49084be5b4c031085b56c7443Vendor (CNA)
Linux Linux60cc9379c3e650d1ebfba4de63f1242537a62a32Vendor (CNA)
Linux Linux8ed69d299b9d7872f911f089e00cdd2ea6969d2cVendor (CNA)
Linux Linux94601d83fc4811485ca6fb1d50bece589fe1c24dVendor (CNA)
Linux Linuxbf296d7b75bfd49dc519ad0406e89ddc5c3f02e3Vendor (CNA)
Linux Linuxe4a6883ad9b4686a5f4bd90ff55a44d7ab65bd3cVendor (CNA)
Linux Linuxe80ee74206f260eb1282e7d1339ff146a4a410d0Vendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
azl3 kernel 6.6.159.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
debian:linux6.12.113-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.113-1~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.

  1. Published
  2. Fix recordedsame day
  3. TodayNov 6, 2026+19 d
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. Exploit maturity— → none
  2. 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