CVE-2026-57589

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.8 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 94% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 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
7.8
EG Score
7.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity78% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
7%
KEV
Not listed

Published

June 25, 2026

Last Modified

July 10, 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 5× in last 7d / 58× 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 211 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 13:47 UTCEPSS rescore
  6. 2026-09-04 05:07 UTCEPSS rescore
  7. 2026-09-02 14:12 UTCEPSS rescore
  8. 2026-09-01 13:54 UTCEPSS rescore
  9. 2026-09-01 04:40 UTCEPSS rescore
  10. 2026-08-30 19:48 UTCEG score recompute
  11. 2026-08-30 19:48 UTCGHSA enrichment
  12. 2026-08-30 19:17 UTCEPSS rescore
  13. 2026-08-30 01:22 UTCEPSS rescore
  14. 2026-08-28 21:42 UTCEPSS rescore
  15. 2026-08-28 02:57 UTCEG score recompute
  16. 2026-08-28 02:57 UTCGHSA enrichment
  17. 2026-08-27 14:25 UTCEPSS rescore
  18. 2026-08-26 14:46 UTCEPSS rescore
  19. 2026-08-25 13:49 UTCEPSS rescore
  20. 2026-08-25 01:21 UTCEG score recompute
  21. 2026-08-25 01:21 UTCGHSA enrichment
  22. 2026-08-24 13:17 UTCEG score recompute
  23. 2026-08-24 13:17 UTCGHSA enrichment
  24. 2026-08-23 23:12 UTCGHSA enrichment
  25. 2026-08-23 11:00 UTCGHSA enrichment
Show 75 more
  1. 2026-08-22 23:02 UTCGHSA enrichment
  2. 2026-08-22 11:03 UTCEG score recompute
  3. 2026-08-22 11:03 UTCGHSA enrichment
  4. 2026-08-21 23:49 UTCEPSS rescore
  5. 2026-08-21 19:14 UTCGHSA enrichment
  6. 2026-08-21 07:15 UTCEG score recompute
  7. 2026-08-21 07:15 UTCGHSA enrichment
  8. 2026-08-20 22:55 UTCEPSS rescore
  9. 2026-08-20 19:11 UTCGHSA enrichment
  10. 2026-08-20 07:12 UTCEG score recompute
  11. 2026-08-20 07:12 UTCGHSA enrichment
  12. 2026-08-19 17:04 UTCEPSS rescore
  13. 2026-08-19 13:43 UTCGHSA enrichment
  14. 2026-08-19 01:38 UTCEG score recompute
  15. 2026-08-19 01:38 UTCGHSA enrichment
  16. 2026-08-17 13:47 UTCEPSS rescore
  17. 2026-08-17 08:33 UTCGHSA enrichment
  18. 2026-08-16 20:35 UTCEG score recompute
  19. 2026-08-16 20:35 UTCGHSA enrichment
  20. 2026-08-16 14:56 UTCEPSS rescore
  21. 2026-08-16 08:36 UTCEG score recompute
  22. 2026-08-16 08:36 UTCGHSA enrichment
  23. 2026-08-16 02:14 UTCEPSS rescore
  24. 2026-08-15 20:37 UTCGHSA enrichment
  25. 2026-08-15 08:37 UTCEG score recompute
  26. 2026-08-15 08:37 UTCGHSA enrichment
  27. 2026-08-15 01:30 UTCEPSS rescore
  28. 2026-08-14 20:03 UTCGHSA enrichment
  29. 2026-08-14 08:04 UTCEG score recompute
  30. 2026-08-14 08:04 UTCGHSA enrichment
  31. 2026-08-13 22:00 UTCEPSS rescore
  32. 2026-08-13 20:05 UTCGHSA enrichment
  33. 2026-08-13 08:06 UTCGHSA enrichment
  34. 2026-08-12 20:07 UTCEG score recompute
  35. 2026-08-12 20:07 UTCGHSA enrichment
  36. 2026-08-12 13:51 UTCEPSS rescore
  37. 2026-08-12 08:08 UTCGHSA enrichment
  38. 2026-08-11 20:09 UTCEG score recompute
  39. 2026-08-11 20:09 UTCGHSA enrichment
  40. 2026-08-11 08:11 UTCEG score recompute
  41. 2026-08-11 08:11 UTCGHSA enrichment
  42. 2026-08-11 00:00 UTCEPSS rescore
  43. 2026-08-10 20:12 UTCGHSA enrichment
  44. 2026-08-10 08:14 UTCGHSA enrichment
  45. 2026-08-09 20:15 UTCGHSA enrichment
  46. 2026-08-09 08:16 UTCGHSA enrichment
  47. 2026-08-08 20:18 UTCEG score recompute
  48. 2026-08-08 20:18 UTCGHSA enrichment
  49. 2026-08-08 16:37 UTCEPSS rescore
  50. 2026-08-08 08:19 UTCGHSA enrichment
  51. 2026-08-07 20:21 UTCEG score recompute
  52. 2026-08-07 20:21 UTCGHSA enrichment
  53. 2026-08-07 08:22 UTCGHSA enrichment
  54. 2026-08-06 20:23 UTCEG score recompute
  55. 2026-08-06 20:23 UTCGHSA enrichment
  56. 2026-08-06 13:47 UTCEPSS rescore
  57. 2026-08-06 08:24 UTCGHSA enrichment
  58. 2026-08-05 20:26 UTCEG score recompute
  59. 2026-08-05 20:26 UTCGHSA enrichment
  60. 2026-08-05 19:17 UTCEPSS rescore
  61. 2026-08-05 08:27 UTCGHSA enrichment
  62. 2026-08-04 16:07 UTCEG score recompute
  63. 2026-08-04 16:07 UTCGHSA enrichment
  64. 2026-08-04 15:10 UTCEPSS rescore
  65. 2026-08-04 10:39 UTCEPSS rescore
  66. 2026-08-04 04:08 UTCGHSA enrichment
  67. 2026-08-03 16:10 UTCEG score recompute
  68. 2026-08-03 16:10 UTCGHSA enrichment
  69. 2026-08-03 10:36 UTCEPSS rescore
  70. 2026-08-03 04:11 UTCGHSA enrichment
  71. 2026-08-02 16:07 UTCGHSA enrichment
  72. 2026-08-02 04:09 UTCEG score recompute
  73. 2026-08-02 04:09 UTCGHSA enrichment
  74. 2026-08-02 02:27 UTCEPSS rescore
  75. 2026-08-01 16:07 UTCEG score recompute

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 July 10, 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 0% probability of exploitation in the next 30 days, which ranks it in the top 93.5% of all scored CVEs.
What is the CVSS score of CVE-2026-57589?
CVE-2026-57589 has a CVSS v3 base score of 7.8 (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.

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