CVE-2026-57589_CVE-2026-57589

7.4 / 10

HIGH

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

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().

Basic Information

ID CVE-2026-57589

Source mitre

Published Jun 25, 2026 at 00:33

Affected Product

Vendor OpenBSD

Product OpenBSD

Affected Versions OpenBSD OpenBSD 0

CWE Classification

CWE-416

References

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    "lastseen": "",
    "description": "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().",
    "published": "2026-06-25T00:33:04.749Z",
    "modified": "2026-06-25T00:33:04.749Z",
    "type": "cve",
    "title": "CVE-2026-57589",
    "source": "mitre",
    "references": "https://github.com/openbsd/src/commit/1957873d2063db11dab780eca75b5e629d1e838d\nhttps://openai.com/index/patch-the-planet/",
    "id": "CVE-2026-57589",
    "bulletinFamily": "",
    "cwe": [
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    "cvelist": null,
    "sourceData": "OpenBSD OpenBSD 0",
    "sourceHref": "",
    "cvss": {
        "score": 7.4,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
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        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "OpenBSD",
    "version": "0",
    "vendor": "OpenBSD",
    "ai_description": "",
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    "ai_version": "",
    "ai_score": 0
}