{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-58094", "assignerOrgId": "63664ac6-956c-4cba-a5d0-f46076e16109", "state": "PUBLISHED", "assignerShortName": "freebsd", "dateReserved": "2026-06-29T01:40:17.499Z", "datePublished": "2026-08-26T05:39:42.893Z", "dateUpdated": "2026-08-26T05:39:42.893Z"}, "containers": {"cna": {"datePublic": "2026-08-25T19:45:00.000Z", "title": "TOCTOU race in POSIX shared memory large page configuration", "references": [{"tags": ["vendor-advisory"], "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:63.posixshm.asc"}], "affected": [{"defaultStatus": "unknown", "modules": ["posixshm"], "product": "FreeBSD", "vendor": "FreeBSD", "versions": [{"status": "affected", "versionType": "release", "version": "15.1-RELEASE", "lessThan": "p3"}, {"status": "affected", "versionType": "release", "version": "15.0-RELEASE", "lessThan": "p13"}, {"status": "affected", "versionType": "release", "version": "14.4-RELEASE", "lessThan": "p9"}]}], "credits": [{"lang": "en", "type": "finder", "value": "tsune of GMO Cybersecurity by Ierae, Inc. working with TrendAI Zero Day Initiative"}], "descriptions": [{"lang": "en", "value": "The FIOSSHMLPGCNF ioctl(2) operation configures the page size for a largepage shared memory object. This is intended to be used immediately after creating the object, before any memory is allocated for the object. The handler checked whether a page size had already been configured without holding the rangelock. Two concurrent callers could both observe an unconfigured object and set conflicting page sizes, leaving the object in an inconsistent state.\n\nAn unprivileged local user can exploit this race to escalate privileges."}], "problemTypes": [{"descriptions": [{"cweId": "CWE-367", "description": "CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "63664ac6-956c-4cba-a5d0-f46076e16109", "shortName": "freebsd", "dateUpdated": "2026-08-26T05:39:42.893Z"}, "x_generator": {"engine": "cvelib 1.8.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unknown", "modules": ["posixshm"], "product": "FreeBSD", "vendor": "FreeBSD", "versions": [{"lessThan": "p3", "status": "affected", "version": "15.1-RELEASE", "versionType": "release"}, {"lessThan": "p13", "status": "affected", "version": "15.0-RELEASE", "versionType": "release"}, {"lessThan": "p9", "status": "affected", "version": "14.4-RELEASE", "versionType": "release"}]}], "source": "secteam@freebsd.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The FIOSSHMLPGCNF ioctl(2) operation configures the page size for a largepage shared memory object. This is intended to be used immediately after creating the object, before any memory is allocated for the object. The handler checked whether a page size had already been configured without holding the rangelock. Two concurrent callers could both observe an unconfigured object and set conflicting page sizes, leaving the object in an inconsistent state.\n\nAn unprivileged local user can exploit this race to escalate privileges."}], "id": "CVE-2026-58094", "lastModified": "2026-08-26T16:54:50.030", "metrics": {}, "published": "2026-08-26T06:16:26.350", "references": [{"source": "secteam@freebsd.org", "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:63.posixshm.asc"}], "sourceIdentifier": "secteam@freebsd.org", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-367"}], "source": "secteam@freebsd.org", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[15.1-RELEASE,p3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[15.0-RELEASE,p13)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[14.4-RELEASE,p9)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "FreeBSD", "source": "cna", "vendor": "FreeBSD"}, "product": "freebsd", "vendor": "freebsd"}], "created": "2026-08-26T07:45:02.254384+00:00", "updated": "2026-08-26T07:45:02.499799+00:00", "vendors": ["freebsd", "freebsd$PRODUCT$freebsd"]}