CVE-2026-16552

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-16552", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "state": "REJECTED", "assignerShortName": "redhat", "dateReserved": "2026-07-22T11:11:01.973Z", "datePublished": "2026-07-22T15:55:58.222Z", "dateUpdated": "2026-07-23T10:24:24.056Z", "dateRejected": "2026-07-23T10:24:24.056Z"}, "containers": {"cna": {"rejectedReasons": [{"lang": "en", "value": "The reported issue is invalid, as it requires root privileges to reproduce, and it is out of scope of the threat model of the affected component."}], "providerMetadata": {"orgId": "98a521c5-3a3e-4e2b-bc27-002067e0463c", "shortName": "systemd", "dateUpdated": "2026-07-23T10:24:24.056Z"}}}}

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-16552", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "state": "REJECTED", "assignerShortName": "redhat", "dateReserved": "2026-07-22T11:11:01.973Z", "datePublished": "2026-07-22T15:55:58.222Z", "dateUpdated": "2026-07-23T10:24:24.056Z", "dateRejected": "2026-07-23T10:24:24.056Z"}, "containers": {"cna": {"rejectedReasons": [{"lang": "en", "value": "The reported issue is invalid, as it requires root privileges to reproduce, and it is out of scope of the threat model of the affected component."}], "providerMetadata": {"orgId": "98a521c5-3a3e-4e2b-bc27-002067e0463c", "shortName": "systemd", "dateUpdated": "2026-07-23T10:24:24.056Z"}}}}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Rejected reason: The reported issue is invalid, as it requires root privileges to reproduce, and it is out of scope of the threat model of the affected component."}], "id": "CVE-2026-16552", "lastModified": "2026-07-23T11:16:39.370", "metrics": {}, "published": "2026-07-22T16:17:16.653", "references": [], "sourceIdentifier": "98a521c5-3a3e-4e2b-bc27-002067e0463c", "vulnStatus": "Rejected"}

{"acknowledgement": "Red Hat would like to thank \u0130brahim Sa\u011flam (Eresus Security) for reporting this issue.", "bugzilla": {"description": "systemd: systemd-tmpfiles symlink-redirected arbitrary file overwrite via a CHASE_SAFE root-to-unprivileged ownership transition bypass", "id": "2506073", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2506073"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H", "status": "draft"}, "cwe": "CWE-59", "details": ["A flaw was found in systemd-tmpfiles. When processing a tmpfiles.d configuration entry that writes to a file, systemd-tmpfiles can follow a symbolic link placed by an unprivileged local user, and an existing safety check does not detect this specific case because it always treats transitions away from the root user as safe. On systems where a tmpfiles.d configuration targets a path an unprivileged user can influence, this could allow that user to redirect a privileged systemd-tmpfiles write to a file of their choosing, though the content written remains determined by the existing configuration rather than by the unprivileged user. The highest threat from this vulnerability is to integrity."], "mitigation": {"lang": "en:us", "value": "Restrict or audit any custom tmpfiles.d configuration entries (e.g. authored via configuration-management tooling) that use the 'w' item type against paths under /run/user/*, per-user home directories, or other locations where an unprivileged user can influence path resolution, until an upstream fix is available."}, "name": "CVE-2026-16552", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "impact": "moderate", "package_name": "systemd", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "impact": "moderate", "package_name": "systemd", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "impact": "moderate", "package_name": "systemd", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "impact": "moderate", "package_name": "systemd", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "impact": "moderate", "package_name": "systemd", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "impact": "moderate", "package_name": "systemd", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-07-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-16552\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-16552\nhttps://github.com/systemd/systemd/blob/b9ef5951f8f9e156479494fdb9ca6274cb3d3c53/src/basic/chase.c\nhttps://github.com/systemd/systemd/blob/b9ef5951f8f9e156479494fdb9ca6274cb3d3c53/src/tmpfiles/tmpfiles.c"], "statement": "This flaw requires a tmpfiles.d 'w'-type entry that an unprivileged user can redirect via a symlink, for example under /run/user/<uid>. No such entry is shipped by default; a review of every tmpfiles.d configuration shipped in Red Hat Enterprise Linux found only one 'w'-type entry, from selinux-policy, which does not qualify.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "Red Hat Enterprise Linux 10", "source": "cna", "vendor": "Red Hat"}, "product": "enterprise_linux", "vendor": "redhat"}, {"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 83.0, "confidence_source": "matching", "scores": [{"score": 83.0, "source": "matching"}]}, "original": {"product": "Red Hat Hardened Images", "source": "cna", "vendor": "Red Hat"}, "product": "hardened_images", "vendor": "redhat"}, {"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 86.0, "confidence_source": "matching", "scores": [{"score": 86.0, "source": "matching"}]}, "original": {"product": "Red Hat OpenShift Container Platform 4", "source": "cna", "vendor": "Red Hat"}, "product": "openshift_container_platform", "vendor": "redhat"}, {"configurations": [{"platform": null, "status": "affected", "versions": null}], "product": "systemd", "vendor": "systemd"}], "created": "2026-07-27T20:37:08.103433+00:00", "updated": "2026-07-27T20:37:08.103512+00:00", "vendors": ["redhat", "redhat$PRODUCT$enterprise_linux", "redhat$PRODUCT$hardened_images", "redhat$PRODUCT$openshift_container_platform", "systemd", "systemd$PRODUCT$systemd"]}