CVE-2020-12295

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-06-09 · updated 2026-06-17
Weakness: CWE-20

Description

Improper input validation in some Intel(R) Thunderbolt(TM) controllers may allow an authenticated user to potentially enable denial of service via local access.

Affected products

Intel Dsl5320 Thunderbolt 2 Firmware: all versions
Intel Dsl5520 Thunderbolt 2 Firmware: all versions
Intel Dsl6340 Thunderbolt 3 Firmware: all versions
Intel Dsl6540 Thunderbolt 3 Firmware: all versions
Intel Jhl6240 Thunderbolt 3 Firmware: before 21 — fixed in 21
Intel Jhl6340 Thunderbolt 3 Firmware: before 46 — fixed in 46
Intel Jhl6540 Thunderbolt 3 Firmware: before 46 — fixed in 46
Intel Jhl7040 Thunderbolt 3 Retimer Firmware: before 22 — fixed in 22
Intel Jhl7340 Thunderbolt 3 Firmware: before 60 — fixed in 60
Intel Jhl7440 Thunderbolt 3 Firmware: before 60 — fixed in 60
Intel Jhl7540 Thunderbolt 3 Firmware: before 60 — fixed in 60
Intel Jhl8010R Usb Retimer Firmware: before 41 — fixed in 41
Intel Jhl8040R Thunderbolt 4 Retimer Firmware: before 41 — fixed in 41

How to fix

Upgrade to a fixed version: Intel Jhl6240 Thunderbolt 3 Firmware 21; Intel Jhl6340 Thunderbolt 3 Firmware 46; Intel Jhl6540 Thunderbolt 3 Firmware 46; Intel Jhl7040 Thunderbolt 3 Retimer Firmware 22; Intel Jhl7340 Thunderbolt 3 Firmware 60; Intel Jhl7440 Thunderbolt 3 Firmware 60; Intel Jhl7540 Thunderbolt 3 Firmware 60; Intel Jhl8010R Usb Retimer Firmware 41; Intel Jhl8040R Thunderbolt 4 Retimer Firmware 41. Check the vendor advisory for mitigations.

References

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