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NVD / CVE Program· CNA Linux

CVE-2026-43430: usb: yurex: fix race in probe

MediumCVSS 4.7 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 18/100)

  • 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: 0.08% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: Linux Linux 3cec135415a89723e2d38e1c8cc5098203355965, 687d26d43a5aaf44323ce7d601cf242bb87e9559, 7a875c09899ba0404844abfd8f0d54cdc481c151.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 3cec135415a89723e2d38e1c8cc5098203355965, 687d26d43a5aaf44323ce7d601cf242bb87e9559, 7a875c09899ba0404844abfd8f0d54cdc481c151 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: yurex: fix race in probe The bbu member of the descriptor must be set to the value standing for uninitialized values before the URB whose completion handler sets bbu is submitted. Otherwise there is a window during which probing can overwrite already retrieved data.

Published
May 8, 2026
Updated
Nov 11, 2026
EPSS
0.0% · 0th percentile

Report tools

JSON

Action score

18

Monitor

Low priority for now.

CVSS
18 / 40 · 4.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.0%

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-2026-43430

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.

VendorProduct
linuxlinux kernel

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

    • 2.6.37affected
    • 6bc235a2e24a5ef677daee3fd4f74f6cd643e23c and later · before a7934d7202a39c3160aa30521c382c7b744ae4a2affected · git
    • 6bc235a2e24a5ef677daee3fd4f74f6cd643e23c and later · before a8b3b3d730acea1640bc89465f2832cf06a1e13aaffected · git
    • 6bc235a2e24a5ef677daee3fd4f74f6cd643e23c and later · before 687d26d43a5aaf44323ce7d601cf242bb87e9559affected · git
    • 6bc235a2e24a5ef677daee3fd4f74f6cd643e23c and later · before 939e3d17b843b0bae70467fef4481069d73c8520affected · git
    • 6bc235a2e24a5ef677daee3fd4f74f6cd643e23c and later · before 3cec135415a89723e2d38e1c8cc5098203355965affected · git
    • 6bc235a2e24a5ef677daee3fd4f74f6cd643e23c and later · before a41d3d9202e951995cfac6248c565423079c71faaffected · git
    • 6bc235a2e24a5ef677daee3fd4f74f6cd643e23c and later · before af83e92c329f11139d5eea2b5b7b83c26c3f67e7affected · git
    • 6bc235a2e24a5ef677daee3fd4f74f6cd643e23c and later · before 7a875c09899ba0404844abfd8f0d54cdc481c151affected · git
    • before 2.6.37not affected · semver
Affected versions · NVD (8)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel2.6.37 and later · before 5.10.253
  • linux linux kernel5.11 and later · before 5.15.203
  • linux linux kernel5.16 and later · before 6.1.167
  • linux linux kernel6.2 and later · before 6.6.130
  • linux linux kernel6.7 and later · before 6.12.78
  • linux linux kernel6.13 and later · before 6.18.19
  • linux linux kernel6.19 and later · before 6.19.9
  • linux linux kernel7.0

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.170-16.1.170-1
Debian:13linuxbefore 6.12.85-16.12.85-1
Debian:14linuxbefore 6.19.10-16.19.10-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe…KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-43428May 8, 2026 · USB: core: Limit the length of unkillable synchronous timeouts
    22Monitor
  • ← EarlierCVE-2026-43429May 8, 2026 · USB: usbtmc: Use usb_bulk_msg_killable() with user-specified timeouts
    22Monitor
  • Later →CVE-2026-43431May 8, 2026 · xhci: Fix NULL pointer dereference when reading portli debugfs files
    22Monitor

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 Linux3cec135415a89723e2d38e1c8cc5098203355965Vendor (CNA)
Linux Linux687d26d43a5aaf44323ce7d601cf242bb87e9559Vendor (CNA)
Linux Linux7a875c09899ba0404844abfd8f0d54cdc481c151Vendor (CNA)
Linux Linux939e3d17b843b0bae70467fef4481069d73c8520Vendor (CNA)
Linux Linuxa41d3d9202e951995cfac6248c565423079c71faVendor (CNA)
Linux Linuxa7934d7202a39c3160aa30521c382c7b744ae4a2Vendor (CNA)
Linux Linuxa8b3b3d730acea1640bc89465f2832cf06a1e13aVendor (CNA)
Linux Linuxaf83e92c329f11139d5eea2b5b7b83c26c3f67e7Vendor (CNA)
debian:linux6.1.170-1 · 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.

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

References

Show all references (7 more)

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

All records