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CVE-2023-54186· NVD / CVE Program· CNA Linux

usb: typec: altmodes/displayport: fix pin_assignment_show

Noroxi assessment

Priority: Monitor (action score 31/100)

  • 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: 0.15% (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 08bd1be1c716fd50a7df48f82dcbc59a103082b5, 0e61a7432fcd4bca06f05b7f1c7d7cb461880fe2, 4f9c0a7c272626cb6716ffc7800e8c73260cdce6.

Low priority for now. Upgrade to Linux Linux 08bd1be1c716fd50a7df48f82dcbc59a103082b5, 0e61a7432fcd4bca06f05b7f1c7d7cb461880fe2, 4f9c0a7c272626cb6716ffc7800e8c73260cdce6 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: altmodes/displayport: fix pin_assignment_show This patch fixes negative indexing of buf array in pin_assignment_show when get_current_pin_assignments returns 0 i.e. no compatible pin assignments are found. BUG: KASAN: use-after-free in pin_assignment_show+0x26c/0x33c ... Call trace: dump_backtrace+0x110/0x204 dump_stack_lvl+0x84/0xbc print_report+0x358/0x974 kasan_report+0x9c/0xfc __do_kernel_fault+0xd4/0x2d4 do_bad_area+0x48/0x168 do_tag_check_fault+0x24/0x38 do_mem_abort+0x6c/0x14c el1_abort+0x44/0x68 el1h_64_sync_handler+0x64/0xa4 el1h_64_sync+0x78/0x7c pin_assignment_show+0x26c/0x33c dev_attr_show+0x50/0xc0

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Dec 30, 2025
Updated
Aug 5, 2026
EPSS
0.1% · 3th percentile
CWE
—

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CNA vs NVD score

NVD
—
CNA · Linux
7.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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-2023-54186

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

    • 4.19affected
    • 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 and later · before 0e61a7432fcd4bca06f05b7f1c7d7cb461880fe2affected · git
    • 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 and later · before 4f9c0a7c272626cb6716ffc7800e8c73260cdce6affected · git
    • 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 and later · before ff466f77d0a56719979c4234abd412abd98eae8faffected · git
    • 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 and later · before fc0e18f95c88435bd8a1ceb540243cd7fbcd9781affected · git
    • 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 and later · before 08bd1be1c716fd50a7df48f82dcbc59a103082b5affected · git
    • 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 and later · before 54ee23e4ab263a495ace1eed43d3883212ece17faffected · git
    • 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 and later · before d8f28269dd4bf9b55c3fb376ae31512730a96fceaffected · git
    • before 4.19not affected · semver
    • 4.19.284 and later · up to and including 4.19.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.37-16.1.37-1
Debian:13linuxbefore 6.3.7-16.3.7-1

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-2023-54184Dec 30, 2025 · scsi: target: iscsit: Free cmds before session free
    39Monitor
  • ← EarlierCVE-2023-54185Dec 30, 2025 · btrfs: remove BUG_ON()'s in add_new_free_space()
    0Monitor
  • Later →CVE-2023-54187Dec 30, 2025 · f2fs: fix potential corruption when moving a directory
    31Monitor

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 Linux08bd1be1c716fd50a7df48f82dcbc59a103082b5Vendor (CNA)
Linux Linux0e61a7432fcd4bca06f05b7f1c7d7cb461880fe2Vendor (CNA)
Linux Linux4f9c0a7c272626cb6716ffc7800e8c73260cdce6Vendor (CNA)
Linux Linux54ee23e4ab263a495ace1eed43d3883212ece17fVendor (CNA)
Linux Linuxd8f28269dd4bf9b55c3fb376ae31512730a96fceVendor (CNA)
Linux Linuxfc0e18f95c88435bd8a1ceb540243cd7fbcd9781Vendor (CNA)
Linux Linuxff466f77d0a56719979c4234abd412abd98eae8fVendor (CNA)
debian:linux6.1.37-1 · 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.

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

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

Weakness class (CWE)

—

CVSS vector

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

nvd-secondary

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 (6 more)

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

All records