CVE-2021-3571

HIGH
7.1
CVSS Score
Published: July 9, 2021 at 10:33 AM UTC
Updated: June 17, 2026 at 04:05 AM UTC
3 products affected across 3 vendorsFedoraEnterprise LinuxLinuxptp

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Severity
HIGH7.1
Exploit prediction
EPSS 2%

Description

A flaw was found in the ptp4l program of the linuxptp package. When ptp4l is operating on a little-endian architecture as a PTP transparent clock, a remote attacker could send a crafted one-step sync message to cause an information leak or crash. The highest threat from this vulnerability is to data confidentiality and system availability. This flaw affects linuxptp versions before 3.1.1 and before 2.0.1.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 2.0.13.0 ≤ v < 3.1.12.0.13.1.1
Affected range stops below 2.0.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.1.1, so it looks safe — our inference, not a vendor statement

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-119CWE-125

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