CVE-2026-58302

HIGHPre-NVD 8.48.4—
EchelonGraph scoreMEDIUM confidence

Score 8.4 from GitHub Security Advisory (severity: HIGH) published 2026-06-30. a secondary CVSS source baseline 8.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.4Exploit: None knownExposed: 0

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

rtapi_app in linuxcnc-uspace in LinuxCNC before 2.9.9 allows privilege escalation. It is installed SUID root and loads shared library modules via dlopen() by using a user-supplied module name. Insufficient validation of the module name allows path traversal, enabling an unprivileged local user to load an arbitrary shared library. Because the process retains elevated privileges during module loading, this results in local privilege escalation to root.

CVSS v3
8.4
EG Score
8.4(medium)
EG Risk
38(Track)
EG Risk 38/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity84% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
9%
KEV
Not listed

Published

June 30, 2026

Last Modified

June 30, 2026

Advisory Details (4)

Auto-updated Jun 30, 2026
Patch available. Sources: github_commit.
generic

Comparing v2.9.8...v2.9.9 · LinuxCNC/linuxcnc · GitHub

https://github.com/LinuxCNC/linuxcnc/compare/v2.9.8...v2.9.9
github_commit

commit ea7cd579d39b (LinuxCNC/linuxcnc)

Fix landed in LinuxCNC/linuxcnc commit ea7cd579d39b — awaiting tagged release

https://github.com/LinuxCNC/linuxcnc/commit/ea7cd579d39b586952a42e3da9a26d3e36e7a272
github_commit Patch Available

commit 00d534c87464 (LinuxCNC/linuxcnc)

Patch available: LinuxCNC/linuxcnc v2.9.9 (contains commit 00d534c87464)

https://github.com/LinuxCNC/linuxcnc/commit/00d534c87464a3ed446656998aa02b8abc74b391
generic Patch Available

#1140943 - LinuxCNC: Security issue in suid RTAPI component - Debian Bug report logs

https://bugs.debian.org/1140943

Vendor Advisories for CVE-2026-58302(1)

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

Affected Packages

(2 across 2 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linuxcnc2.9.0~pre1+git20230208.f1270d6ed7-1, 2.9.0~pre1+git20230208.f1270d6ed7-1+deb12u12.9.0~pre1+git20230208.f1270d6ed7-1+deb12u2—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linuxcnc1:2.9.4-21:2.9.4-2+deb13u1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 63× 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 202 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-58302?
CVE-2026-58302 is a high vulnerability published on June 30, 2026. rtapi_app in linuxcnc-uspace in LinuxCNC before 2.9.9 allows privilege escalation. It is installed SUID root and loads shared library modules via dlopen() by using a user-supplied module name. Insufficient validation of the module name allows path traversal, enabling an unprivileged local user to…
When was CVE-2026-58302 disclosed?
CVE-2026-58302 was first published in the National Vulnerability Database on June 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-58302 actively exploited?
CVE-2026-58302 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 90.8% of all scored CVEs.
What is the CVSS score of CVE-2026-58302?
CVE-2026-58302 has a CVSS v3 base score of 8.4 (NVD).
How do I remediate CVE-2026-58302?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-58302, 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.

Dependency Blast Radius

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