Cyber Resilience

CVE-2026-57589

High

Published: 25 June 2026

Published
25 June 2026
Modified
26 June 2026
KEV Added
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Patch
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CVSS Score v3.1 7.4 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0013 2.6th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-57589 is a high-severity Use After Free (CWE-416) vulnerability in Openai (inferred from references). Its CVSS base score is 7.4 (High).

Operationally, ranked at the 2.6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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().

CWE(s)
CWE-416

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

Openai
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inferred from references and description; NVD did not file a CPE for this CVE

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-16 Memory Protection
addresses: CWE-416

Use-after-free exploits that achieve arbitrary code execution are blocked or significantly hardened by non-executable pages and ASLR.

References