CVE-2026-45253

HIGHNVD 8.48.4—
EchelonGraph scoreMEDIUM confidence

Score 8.4 from GitHub Security Advisory (severity: HIGH) published 2026-05-21. NVD baseline CVSS 8.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.4
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.4Exploit: NoneExposed: 0

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

ptrace(PT_SC_REMOTE) failed to properly validate parameters for the syscall(2) and __syscall(2) meta-system calls. As a result, a user with the ability to debug a process may trigger arbitrary code execution in the kernel, even if the target process has no special privileges.

The missing validation allows an unprivileged local user to escalate privileges, potentially gaining full control of the affected system.

CVSS v3
8.4
EG Score
8.4(medium)
EPSS
9.5%
KEV
Not listed

Published

May 21, 2026

Last Modified

May 21, 2026

Advisory Details (1)

Auto-updated Jun 3, 2026
No patch confirmed yet.
generic
https://security.freebsd.org/advisories/FreeBSD-SA-26:21.ptrace.asc

Vendor Advisories for CVE-2026-45253(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 55× 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.

Showing the most recent 100 of 145 total refreshes for this CVE.

  1. 2026-07-15 02:00 UTCEPSS rescore
  2. 2026-07-13 22:30 UTCEPSS rescore
  3. 2026-07-13 06:13 UTCEPSS rescore
  4. 2026-07-12 05:46 UTCEPSS rescore
  5. 2026-07-11 08:27 UTCEPSS rescore
  6. 2026-07-09 19:10 UTCEPSS rescore
  7. 2026-07-08 15:16 UTCEPSS rescore
  8. 2026-07-07 13:46 UTCEPSS rescore
  9. 2026-07-06 16:27 UTCEPSS rescore
  10. 2026-07-06 02:23 UTCEPSS rescore
  11. 2026-07-05 02:30 UTCEPSS rescore
  12. 2026-07-04 06:31 UTCEPSS rescore
  13. 2026-07-01 15:07 UTCEPSS rescore
  14. 2026-06-30 23:22 UTCEPSS rescore
  15. 2026-06-29 20:12 UTCEG score recompute
  16. 2026-06-29 20:12 UTCGHSA enrichment
  17. 2026-06-29 14:06 UTCEPSS rescore
  18. 2026-06-29 14:06 UTCEPSS rescore
  19. 2026-06-28 14:07 UTCEPSS rescore
  20. 2026-06-28 07:54 UTCEG score recompute
  21. 2026-06-28 07:53 UTCGHSA enrichment
  22. 2026-06-28 04:56 UTCEPSS rescore
  23. 2026-06-28 04:56 UTCEPSS rescore
  24. 2026-06-27 19:58 UTCEG score recompute
  25. 2026-06-27 19:58 UTCGHSA enrichment
Show 75 more
  1. 2026-06-27 07:23 UTCEG score recompute
  2. 2026-06-27 07:23 UTCGHSA enrichment
  3. 2026-06-27 03:08 UTCEPSS rescore
  4. 2026-06-26 19:26 UTCEG score recompute
  5. 2026-06-26 19:26 UTCGHSA enrichment
  6. 2026-06-26 03:39 UTCEG score recompute
  7. 2026-06-26 03:39 UTCGHSA enrichment
  8. 2026-06-25 14:27 UTCEG score recompute
  9. 2026-06-25 14:27 UTCGHSA enrichment
  10. 2026-06-25 13:49 UTCEPSS rescore
  11. 2026-06-24 14:05 UTCEPSS rescore
  12. 2026-06-23 21:33 UTCEPSS rescore
  13. 2026-06-22 14:25 UTCEPSS rescore
  14. 2026-06-22 14:25 UTCEPSS rescore
  15. 2026-06-21 14:56 UTCEPSS rescore
  16. 2026-06-21 14:56 UTCEPSS rescore
  17. 2026-06-21 01:59 UTCEPSS rescore
  18. 2026-06-19 19:25 UTCEPSS rescore
  19. 2026-06-18 17:52 UTCEPSS rescore
  20. 2026-06-18 17:52 UTCEPSS rescore
  21. 2026-06-17 23:01 UTCEG score recompute
  22. 2026-06-17 23:00 UTCGHSA enrichment
  23. 2026-06-17 17:53 UTCEPSS rescore
  24. 2026-06-17 11:15 UTCEG score recompute
  25. 2026-06-17 11:15 UTCGHSA enrichment
  26. 2026-06-16 20:01 UTCEG score recompute
  27. 2026-06-16 20:00 UTCGHSA enrichment
  28. 2026-06-16 17:52 UTCEPSS rescore
  29. 2026-06-16 03:29 UTCEG score recompute
  30. 2026-06-16 03:29 UTCGHSA enrichment
  31. 2026-06-15 17:49 UTCEPSS rescore
  32. 2026-06-15 15:43 UTCEG score recompute
  33. 2026-06-15 15:43 UTCGHSA enrichment
  34. 2026-06-14 21:39 UTCEG score recompute
  35. 2026-06-14 21:39 UTCGHSA enrichment
  36. 2026-06-14 09:54 UTCEG score recompute
  37. 2026-06-14 09:53 UTCGHSA enrichment
  38. 2026-06-13 23:00 UTCEPSS rescore
  39. 2026-06-13 22:08 UTCEG score recompute
  40. 2026-06-13 22:08 UTCGHSA enrichment
  41. 2026-06-13 08:55 UTCEG score recompute
  42. 2026-06-13 08:55 UTCGHSA enrichment
  43. 2026-06-12 23:12 UTCEPSS rescore
  44. 2026-06-12 23:12 UTCEPSS rescore
  45. 2026-06-12 21:08 UTCEG score recompute
  46. 2026-06-12 21:08 UTCGHSA enrichment
  47. 2026-06-12 09:19 UTCEG score recompute
  48. 2026-06-12 09:19 UTCGHSA enrichment
  49. 2026-06-11 21:33 UTCEG score recompute
  50. 2026-06-11 21:33 UTCGHSA enrichment
  51. 2026-06-11 14:00 UTCEPSS rescore
  52. 2026-06-11 09:47 UTCEG score recompute
  53. 2026-06-11 09:47 UTCGHSA enrichment
  54. 2026-06-10 22:01 UTCEG score recompute
  55. 2026-06-10 22:01 UTCGHSA enrichment
  56. 2026-06-10 13:22 UTCEPSS rescore
  57. 2026-06-10 13:22 UTCEPSS rescore
  58. 2026-06-10 10:15 UTCEG score recompute
  59. 2026-06-10 10:15 UTCGHSA enrichment
  60. 2026-06-09 22:29 UTCEG score recompute
  61. 2026-06-09 22:29 UTCGHSA enrichment
  62. 2026-06-09 10:42 UTCEG score recompute
  63. 2026-06-09 10:42 UTCGHSA enrichment
  64. 2026-06-08 22:57 UTCEG score recompute
  65. 2026-06-08 22:57 UTCGHSA enrichment
  66. 2026-06-08 14:17 UTCEPSS rescore
  67. 2026-06-08 14:17 UTCEPSS rescore
  68. 2026-06-08 11:10 UTCEG score recompute
  69. 2026-06-08 11:10 UTCGHSA enrichment
  70. 2026-06-07 23:24 UTCEG score recompute
  71. 2026-06-07 23:24 UTCGHSA enrichment
  72. 2026-06-07 15:25 UTCEPSS rescore
  73. 2026-06-07 15:25 UTCEPSS rescore
  74. 2026-06-07 11:38 UTCEG score recompute
  75. 2026-06-07 11:38 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-45253?
CVE-2026-45253 is a high vulnerability published on May 21, 2026. ptrace(PTSCREMOTE) failed to properly validate parameters for the syscall(2) and syscall(2) meta-system calls. As a result, a user with the ability to debug a process may trigger arbitrary code execution in the kernel, even if the target process has no special privileges. The missing validation…
When was CVE-2026-45253 disclosed?
CVE-2026-45253 was first published in the National Vulnerability Database on May 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45253 actively exploited?
CVE-2026-45253 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 9.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-45253?
CVE-2026-45253 has a CVSS v3 base score of 8.4 (NVD).
How do I remediate CVE-2026-45253?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45253, 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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