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CVE-2026-5072— ptp: Potential Denial of Service via PTP Interval Shift

Quick assessment

Affected
zephyrproject-rtos Zephyr
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Zephyr是Zephyr开源的一个可扩展的实时操作系统 (RTOS)。 Zephyr存在安全漏洞，该漏洞源于位偏移问题，可能导致远程攻击者通过发送特制的PTP_MSG_MANAGEMENT消息设置未验证的负log_announce_interval值，在后续处理PTP_MSG_ANNOUNCE消息时触发未定义行为，导致系统崩溃或资源耗尽。

AI Predicted 6.5 Difficulty: Moderate EPSS 0.32% · P22

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
zephyrproject-rtos Zephyr *≤ 4.3 affected
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I. Basic Information for CVE-2026-5072

Vulnerability Information
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Vulnerability Title
ptp: Potential Denial of Service via PTP Interval Shift
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Zephyr 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zephyr是Zephyr开源的一个可扩展的实时操作系统 (RTOS)。 Zephyr存在安全漏洞，该漏洞源于位偏移问题，可能导致远程攻击者通过发送特制的PTP_MSG_MANAGEMENT消息设置未验证的负log_announce_interval值，在后续处理PTP_MSG_ANNOUNCE消息时触发未定义行为，导致系统崩溃或资源耗尽。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
zephyrproject-rtos Zephyr * ~ 4.3 -

II. Public POCs for CVE-2026-5072

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III. Intelligence Information for CVE-2026-5072

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Vendor Advisories for CVE-2026-5072 (1)

IV. Related Vulnerabilities

Same product: Zephyr
Same vendor: zephyrproject-rtos

V. Comments for CVE-2026-5072

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