CVE-2026-5072

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 92% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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
EG Score
6.5(medium)
EPSS
9.3%
KEV
Not listed

Published

May 22, 2026

Last Modified

July 8, 2026

Advisory Details (1)

Auto-updated Jun 13, 2026
Patch available. Sources: github.
github Patch Available

ptp: Potential Denial of Service via PTP Interval Shift · Advisory · zephyrproject-rtos/zephyr · GitHub

https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-3v98-458v-388r

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 14× in last 7d / 53× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-11 08:27 UTCEPSS rescore
  2. 2026-07-11 08:27 UTCEPSS rescore
  3. 2026-07-09 19:10 UTCEPSS rescore
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  18. 2026-06-29 16:39 UTCEG score recompute
  19. 2026-06-29 14:06 UTCEPSS rescore
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  21. 2026-06-28 04:56 UTCEPSS rescore
  22. 2026-06-27 19:31 UTCEG score recompute
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  24. 2026-06-26 19:13 UTCEG score recompute
  25. 2026-06-25 14:09 UTCEG score recompute
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  1. 2026-06-25 13:49 UTCEPSS rescore
  2. 2026-06-24 14:05 UTCEPSS rescore
  3. 2026-06-23 21:33 UTCEPSS rescore
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  5. 2026-06-22 14:25 UTCEPSS rescore
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  11. 2026-06-19 19:26 UTCEPSS rescore
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  13. 2026-06-18 17:52 UTCEPSS rescore
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  16. 2026-06-17 10:57 UTCEG score recompute
  17. 2026-06-16 17:53 UTCEPSS rescore
  18. 2026-06-16 06:39 UTCEG score recompute
  19. 2026-06-15 17:49 UTCEPSS rescore
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  21. 2026-06-15 06:21 UTCEG score recompute
  22. 2026-06-14 23:18 UTCEPSS rescore
  23. 2026-06-14 06:05 UTCEG score recompute
  24. 2026-06-13 23:00 UTCEPSS rescore
  25. 2026-06-13 05:48 UTCEG score recompute
  26. 2026-06-12 23:12 UTCEPSS rescore
  27. 2026-06-12 23:12 UTCEPSS rescore
  28. 2026-06-12 05:32 UTCEG score recompute
  29. 2026-06-11 14:00 UTCEPSS rescore
  30. 2026-06-11 05:16 UTCEG score recompute
  31. 2026-06-10 22:19 UTCEPSS rescore
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  35. 2026-06-08 14:17 UTCEPSS rescore
  36. 2026-06-08 04:25 UTCEG score recompute
  37. 2026-06-07 15:25 UTCEPSS rescore
  38. 2026-06-07 04:09 UTCEG score recompute
  39. 2026-06-06 13:47 UTCEPSS rescore
  40. 2026-06-06 03:53 UTCEG score recompute
  41. 2026-06-05 22:47 UTCEPSS rescore
  42. 2026-06-05 06:10 UTCEPSS rescore
  43. 2026-06-05 06:10 UTCEPSS rescore
  44. 2026-06-05 03:37 UTCEG score recompute
  45. 2026-06-04 03:21 UTCEG score recompute
  46. 2026-06-03 03:04 UTCEG score recompute
  47. 2026-06-02 20:13 UTCEPSS rescore
  48. 2026-06-02 02:48 UTCEG score recompute
  49. 2026-06-01 13:52 UTCEPSS rescore
  50. 2026-06-01 13:52 UTCEPSS rescore
  51. 2026-06-01 02:32 UTCEG score recompute▲ 6.50
  52. 2026-05-31 22:30 UTCEPSS rescore
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  54. 2026-05-31 00:16 UTCEPSS rescore
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  56. 2026-05-29 13:44 UTCEPSS rescore
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  62. 2026-05-26 13:44 UTCEPSS rescore
  63. 2026-05-26 07:18 UTCEPSS rescore
  64. 2026-05-22 08:54 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-5072?
CVE-2026-5072 is a medium vulnerability published on May 22, 2026. 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 PTPMSGMANAGEMENT message to set an unvalidated negative logannounceinterval value in the port's data set. When a subsequent…
When was CVE-2026-5072 disclosed?
CVE-2026-5072 was first published in the National Vulnerability Database on May 22, 2026, with the most recent update on July 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-5072 actively exploited?
CVE-2026-5072 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 9.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-5072?
CVE-2026-5072 has a CVSS v3.1 base score of 6.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-5072?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-5072, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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