CVE-2026-58302

HIGHPre-NVD 8.48.4—
EchelonGraph scoreHIGH 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
8.4
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.

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(high)
EPSS
4.8%
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.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 36× in last 7d / 38× 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. 2026-07-07 02:28 UTCEG score recompute
  2. 2026-07-07 02:28 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 13:29 UTCEG score recompute
  6. 2026-07-06 13:29 UTCGHSA enrichment
  7. 2026-07-06 02:23 UTCEPSS rescore
  8. 2026-07-06 02:23 UTCEPSS rescore
  9. 2026-07-06 00:30 UTCEG score recompute
  10. 2026-07-06 00:30 UTCGHSA enrichment
  11. 2026-07-05 11:32 UTCEG score recompute
  12. 2026-07-05 11:32 UTCGHSA enrichment
  13. 2026-07-05 02:31 UTCEPSS rescore
  14. 2026-07-05 02:30 UTCEPSS rescore
  15. 2026-07-04 22:34 UTCEG score recompute
  16. 2026-07-04 22:34 UTCGHSA enrichment
  17. 2026-07-04 09:37 UTCEG score recompute
  18. 2026-07-04 09:37 UTCGHSA enrichment
  19. 2026-07-04 06:31 UTCEPSS rescore
  20. 2026-07-04 06:31 UTCEPSS rescore
  21. 2026-07-03 20:40 UTCEG score recompute
  22. 2026-07-03 20:40 UTCGHSA enrichment
  23. 2026-07-03 07:42 UTCEG score recompute
  24. 2026-07-03 07:41 UTCGHSA enrichment
  25. 2026-07-02 18:44 UTCEG score recompute
Show 13 more
  1. 2026-07-02 18:44 UTCGHSA enrichment
  2. 2026-07-02 05:47 UTCEG score recompute
  3. 2026-07-02 05:47 UTCGHSA enrichment
  4. 2026-07-01 16:49 UTCEG score recompute
  5. 2026-07-01 16:49 UTCGHSA enrichment
  6. 2026-07-01 15:07 UTCEPSS rescore
  7. 2026-07-01 03:52 UTCEG score recompute
  8. 2026-07-01 03:52 UTCGHSA enrichment
  9. 2026-06-30 23:22 UTCEPSS rescore
  10. 2026-06-30 14:54 UTCEG score recompute
  11. 2026-06-30 14:54 UTCGHSA enrichment
  12. 2026-06-30 01:56 UTCEG score recompute
  13. 2026-06-30 01:55 UTCMITRE cvelistV5first tracked

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 4.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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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