Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV A L N N U N N H 6.5 .0030 22.7 —
AFFECTED Product Versions Fixed Zephyr unspecified —
TIMELINE Mar 27 Reserved by zephyr May 22 EXPLOIT PUBLISHED — CVE-2026-5072 (zephyrproject-rtos Zephyr). Public exploit reference added. May 22 Published (CNA: zephyr)
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.
| Date | Event | Detail |
|---|---|---|
| March 27, 2026 | Reserved | Reserved by zephyr |
| May 22, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-5072 (zephyrproject-rtos Zephyr). Public exploit reference added. |
| May 22, 2026 | Published | Published (CNA: zephyr) |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| zephyrproject-rtos | Zephyr | — | — | — |
Authoritative record: CVE-2026-5072 at cve.org
Vendors: zephyrproject-rtos
Weaknesses: CWE-1335
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-5072 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.