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NVD / CVE Program· CNA Linux

CVE-2025-71108: usb: typec: ucsi: Handle incorrect num_connectors capability

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 0.14% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 07c8d2a109d847775b3b4e2c3294c8e1eea75432, 132fe187e0d940f388f839fe2cde9b84106ad20d, 3042a57a8e8bce4a3100c3f6f03dc372aab24943.

Low priority for now. Upgrade to Linux Linux 07c8d2a109d847775b3b4e2c3294c8e1eea75432, 132fe187e0d940f388f839fe2cde9b84106ad20d, 3042a57a8e8bce4a3100c3f6f03dc372aab24943 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: typec: ucsi: Handle incorrect num_connectors capability The UCSI spec states that the num_connectors field is 7 bits, and the 8th bit is reserved and should be set to zero. Some buggy FW has been known to set this bit, and it can lead to a system not booting. Flag that the FW is not behaving correctly, and auto-fix the value so that the system boots correctly. Found on Lenovo P1 G8 during Linux enablement program. The FW will be fixed, but seemed worth addressing in case it hit platforms that aren't officially Linux supported.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Jan 14, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 3th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

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-2025-71108

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

Affected versions

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

  • linux linux kernel4.13.1 and later · before 5.10.248
  • linux linux kernel5.11 and later · before 5.15.198
  • linux linux kernel5.16 and later · before 6.1.160
  • linux linux kernel6.2 and later · before 6.6.120
  • linux linux kernel6.7 and later · before 6.12.64
  • linux linux kernel6.13 and later · before 6.18.3
  • linux linux kernel4.13
  • linux linux kernel6.19

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

    • 4.13affected
    • c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f and later · before 07c8d2a109d847775b3b4e2c3294c8e1eea75432affected · git
    • c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f and later · before 58941bbb0050e365a98c64f1fc4a9a0ac127dba6affected · git
    • c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f and later · before f72f97d0aee4a993a35f2496bca5efd24827235daffected · git
    • c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f and later · before 914605b0de8128434eafc9582445306830748b93affected · git
    • c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f and later · before 3042a57a8e8bce4a3100c3f6f03dc372aab24943affected · git
    • c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f and later · before 132fe187e0d940f388f839fe2cde9b84106ad20daffected · git
    • c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f and later · before 30cd2cb1abf4c4acdb1ddb468c946f68939819fbaffected · git
    • before 4.13not affected · semver
    • 5.10.248 and later · up to and including 5.10.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.162-16.1.162-1
Debian:13linuxbefore 6.12.69-16.12.69-1
Debian:14linuxbefore 6.18.3-16.18.3-1

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-2025-71144Jan 14, 2026 · mptcp: ensure context reset on disconnect()
    22Monitor
  • ← EarlierCVE-2025-71104Jan 14, 2026 · KVM: x86: Fix VM hard lockup after prolonged inactivity with periodic HV timer
    22Monitor
  • Later →CVE-2025-71109Jan 14, 2026 · MIPS: ftrace: Fix memory corruption when kernel is located beyond 32 bits
    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 Linux07c8d2a109d847775b3b4e2c3294c8e1eea75432Vendor (CNA)
Linux Linux132fe187e0d940f388f839fe2cde9b84106ad20dVendor (CNA)
Linux Linux3042a57a8e8bce4a3100c3f6f03dc372aab24943Vendor (CNA)
Linux Linux30cd2cb1abf4c4acdb1ddb468c946f68939819fbVendor (CNA)
Linux Linux58941bbb0050e365a98c64f1fc4a9a0ac127dba6Vendor (CNA)
Linux Linux914605b0de8128434eafc9582445306830748b93Vendor (CNA)
Linux Linuxf72f97d0aee4a993a35f2496bca5efd24827235dVendor (CNA)
debian:linux6.1.162-1 · 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.

No history yet (it accumulates with the daily EPSS job).

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.

  • CVE-2026-46115134 days apartblock: add pgmap check to biovec_phys_mergeable
    39Monitor
  • CVE-2026-53221162 days apartip6_vti: fix incorrect tunnel matching in vti6_tnl_lookup()
    39Monitor
  • CVE-2026-64037186 days apartwifi: iwlwifi: mld: fix TSO segmentation explosion when AMSDU is disabled
    39Monitor
  • CVE-2026-64046186 days apartnet: tls: prevent chain-after-chain in plain text SG
    39Monitor
  • CVE-2026-43114112 days apartnetfilter: nft_set_pipapo_avx2: don't return non-matching entry on expiry
    37Monitor
  • CVE-2026-46266140 days apartinet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP
    36Monitor

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

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

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

Weakness class (CWE)

CWE-20 · Improper Input Validation

CVSS vector

CVSS:3.1/AV:L/AC:L/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.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (6 more)

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

All records