CVE-2026-5072

A bitwise shift vulnerability in Zephyr's PTP subsystem allows a remote attacker to cause undefined behavior and potential system crashes. An attacker sends a crafted PTP_MSG_MANAGEMENT message to set an unvalidated negative log_announce_interval value in the port's data set. When a subsequent PTP_MSG_ANNOUNCE message is processed, port_timer_set_timeout_random computes a timeout as NSEC_PER_SEC >> -log_seconds; if the attacker-supplied value is sufficiently negative (e.g., -127), the shift amount exceeds the 64-bit integer width, triggering undefined behavior in C. This can cause a system crash via a compiler-generated illegal instruction trap on some architectures, or produce an erroneous zero timeout leading to resource starvation loops or other logical errors.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-3v98-458v-388r	Exploit Patch Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:o:zephyrproject:zephyr:*:*:*:*:*:*:*:*

History

08 Jul 2026, 13:31

Type	Values Removed	Values Added
CPE		cpe:2.3:o:zephyrproject:zephyr::::::::
First Time		Zephyrproject zephyr Zephyrproject
References	~~() https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-3v98-458v-388r -~~	() https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-3v98-458v-388r - Exploit, Patch, Vendor Advisory

26 May 2026, 18:16

Type	Values Removed	Values Added
CWE	~~CWE-20~~	CWE-1335

26 May 2026, 15:16

Type	Values Removed	Values Added
CWE		CWE-20

22 May 2026, 17:16

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 6.5

22 May 2026, 08:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-22 08:16

Updated : 2026-07-08 13:31

NVD link : CVE-2026-5072

Mitre link : CVE-2026-5072

CVE.ORG link : CVE-2026-5072

JSON object : View

Products Affected

zephyrproject

zephyr

CWE

CWE-1335

Incorrect Bitwise Shift of Integer

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