Linux Kernel up to 6.3.3 usb pin_assignment_show use after free

CVSS Meta Temp Score
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CTI Interest Score
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7.6$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.3.3. It has been classified as critical. Impacted is the function pin_assignment_show of the component usb. This manipulation causes use after free. The identification of this vulnerability is CVE-2023-54186. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 6.3.3. Affected by this vulnerability is the function pin_assignment_show of the component usb. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2023-54186 since 12/30/2025. The exploitation appears to be easy. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 12/31/2025).

The vulnerability scanner Nessus provides a plugin with the ID 280816 (Linux Distros Unpatched Vulnerability : CVE-2023-54186), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.19.284, 5.4.244, 5.10.181, 5.15.113, 6.1.30 or 6.3.4 eliminates this vulnerability. Applying the patch 0e61a7432fcd4bca06f05b7f1c7d7cb461880fe2/4f9c0a7c272626cb6716ffc7800e8c73260cdce6/ff466f77d0a56719979c4234abd412abd98eae8f/fc0e18f95c88435bd8a1ceb540243cd7fbcd9781/08bd1be1c716fd50a7df48f82dcbc59a103082b5/54ee23e4ab263a495ace1eed43d3883212ece17f/d8f28269dd4bf9b55c3fb376ae31512730a96fce is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (280816). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.6

VulDB Base Score: 8.0
VulDB Temp Score: 7.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 280816
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2023-54186

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 4.19.284/5.4.244/5.10.181/5.15.113/6.1.30/6.3.4
Patch: 0e61a7432fcd4bca06f05b7f1c7d7cb461880fe2/4f9c0a7c272626cb6716ffc7800e8c73260cdce6/ff466f77d0a56719979c4234abd412abd98eae8f/fc0e18f95c88435bd8a1ceb540243cd7fbcd9781/08bd1be1c716fd50a7df48f82dcbc59a103082b5/54ee23e4ab263a495ace1eed43d3883212ece17f/d8f28269dd4bf9b55c3fb376ae31512730a96fce

Timelineinfo

12/30/2025 Advisory disclosed
12/30/2025 +0 days CVE reserved
12/30/2025 +0 days VulDB entry created
12/31/2025 +1 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-54186 (🔒)
GCVE (CVE): GCVE-0-2023-54186
GCVE (VulDB): GCVE-100-338959

Entryinfo

Created: 12/30/2025 16:42
Updated: 12/31/2025 12:45
Changes: 12/30/2025 16:42 (59), 12/31/2025 12:45 (2)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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