CVE-2026-57589

HIGHPre-NVD 7.47.4—
EchelonGraph scoreHIGH confidence

Score 7.4 from GitHub Security Advisory (severity: HIGH) published 2026-06-25. a secondary CVSS source baseline 7.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.4
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.4Exploit: NoneExposed: 0

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

sys/kern/sysv_sem.c in OpenBSD through 7.9 has a use-after-free allowing local privilege escalation to root. This is a context switch use-after-free after tsleep in sys_semget().

CVSS v3
7.4
EG Score
7.4(high)
EPSS
2.6%
KEV
Not listed

Published

June 25, 2026

Last Modified

June 26, 2026

Advisory Details (1)

Auto-updated Jun 25, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
github_commit

commit 1957873d2063 (openbsd/src)

Fix landed in openbsd/src commit 1957873d2063 — awaiting tagged release

https://github.com/openbsd/src/commit/1957873d2063db11dab780eca75b5e629d1e838d

Vendor Advisories for CVE-2026-57589(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 34× in last 7d / 61× 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 02:18 UTCEG score recompute
  2. 2026-07-07 02:18 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 14:05 UTCEG score recompute
  6. 2026-07-06 14:05 UTCGHSA enrichment
  7. 2026-07-06 02:23 UTCEPSS rescore
  8. 2026-07-06 02:23 UTCEPSS rescore
  9. 2026-07-06 02:06 UTCEG score recompute
  10. 2026-07-06 02:06 UTCGHSA enrichment
  11. 2026-07-05 14:08 UTCEG score recompute
  12. 2026-07-05 14:07 UTCGHSA enrichment
  13. 2026-07-05 02:02 UTCEG score recompute
  14. 2026-07-05 02:02 UTCGHSA enrichment
  15. 2026-07-04 14:03 UTCEG score recompute
  16. 2026-07-04 14:03 UTCGHSA enrichment
  17. 2026-07-04 02:03 UTCEG score recompute
  18. 2026-07-04 02:03 UTCGHSA enrichment
  19. 2026-07-03 14:02 UTCEG score recompute
  20. 2026-07-03 14:02 UTCGHSA enrichment
  21. 2026-07-03 02:04 UTCEG score recompute
  22. 2026-07-03 02:03 UTCGHSA enrichment
  23. 2026-07-02 14:04 UTCEG score recompute
  24. 2026-07-02 14:04 UTCGHSA enrichment
  25. 2026-07-02 02:05 UTCEG score recompute
Show 36 more
  1. 2026-07-02 02:04 UTCGHSA enrichment
  2. 2026-07-01 15:07 UTCEPSS rescore
  3. 2026-07-01 14:04 UTCEG score recompute
  4. 2026-07-01 14:04 UTCGHSA enrichment
  5. 2026-07-01 02:05 UTCEG score recompute
  6. 2026-07-01 02:05 UTCGHSA enrichment
  7. 2026-06-30 23:22 UTCEPSS rescore
  8. 2026-06-30 14:04 UTCEG score recompute
  9. 2026-06-30 14:04 UTCGHSA enrichment
  10. 2026-06-30 02:03 UTCEG score recompute
  11. 2026-06-30 02:02 UTCGHSA enrichment
  12. 2026-06-29 14:06 UTCEPSS rescore
  13. 2026-06-29 14:03 UTCEG score recompute
  14. 2026-06-29 14:03 UTCGHSA enrichment
  15. 2026-06-29 02:04 UTCEG score recompute
  16. 2026-06-29 02:04 UTCGHSA enrichment
  17. 2026-06-28 14:07 UTCEPSS rescore
  18. 2026-06-28 14:05 UTCEG score recompute
  19. 2026-06-28 14:05 UTCGHSA enrichment
  20. 2026-06-28 04:56 UTCEPSS rescore
  21. 2026-06-28 02:04 UTCEG score recompute
  22. 2026-06-28 02:04 UTCGHSA enrichment
  23. 2026-06-27 14:04 UTCEG score recompute
  24. 2026-06-27 14:04 UTCGHSA enrichment
  25. 2026-06-27 03:08 UTCEPSS rescore
  26. 2026-06-27 02:04 UTCEG score recompute
  27. 2026-06-27 02:04 UTCGHSA enrichment
  28. 2026-06-26 14:05 UTCEG score recompute
  29. 2026-06-26 14:05 UTCGHSA enrichment
  30. 2026-06-26 02:05 UTCEG score recompute
  31. 2026-06-26 02:05 UTCGHSA enrichment
  32. 2026-06-25 14:07 UTCEG score recompute
  33. 2026-06-25 14:07 UTCGHSA enrichment
  34. 2026-06-25 13:49 UTCEPSS rescore
  35. 2026-06-25 02:07 UTCEG score recompute
  36. 2026-06-25 02:04 UTCNVD updatefirst tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-57589?
CVE-2026-57589 is a high vulnerability published on June 25, 2026. sys/kern/sysvsem.c in OpenBSD through 7.9 has a use-after-free allowing local privilege escalation to root. This is a context switch use-after-free after tsleep in syssemget().
When was CVE-2026-57589 disclosed?
CVE-2026-57589 was first published in the National Vulnerability Database on June 25, 2026, with the most recent update on June 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-57589 actively exploited?
CVE-2026-57589 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-57589?
CVE-2026-57589 has a CVSS v3 base score of 7.4 (NVD).
How do I remediate CVE-2026-57589?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-57589, 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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