CVE-2016-6198

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{"acknowledgement": "This issue was discovered by CAI Qian (Red Hat).", "affected_release": [{"advisory": "RHSA-2016:1875", "cpe": "cpe:/a:redhat:rhel_extras_rt:7", "package": "kernel-rt-0:3.10.0-327.36.1.rt56.237.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2016-09-15T00:00:00Z"}, {"advisory": "RHSA-2016:2584", "cpe": "cpe:/a:redhat:rhel_extras_rt:7", "package": "kernel-rt-0:3.10.0-514.rt56.420.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2016-11-03T00:00:00Z"}, {"advisory": "RHSA-2016:1847", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "kernel-0:3.10.0-327.36.1.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2016-09-15T00:00:00Z"}, {"advisory": "RHSA-2016:2574", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "kernel-0:3.10.0-514.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2016-11-03T00:00:00Z"}], "bugzilla": {"description": "kernel: vfs: missing detection of hardlinks in vfs_rename() on overlayfs", "id": "1355654", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1355654"}, "csaw": false, "cvss": {"cvss_base_score": "4.7", "cvss_scoring_vector": "AV:L/AC:M/Au:N/C:N/I:N/A:C", "status": "verified"}, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-362", "details": ["The filesystem layer in the Linux kernel before 4.5.5 proceeds with post-rename operations after an OverlayFS file is renamed to a self-hardlink, which allows local users to cause a denial of service (system crash) via a rename system call, related to fs/namei.c and fs/open.c.", "A flaw was found that the vfs_rename() function did not detect hard links on overlayfs. A local, unprivileged user could use the rename syscall on overlayfs on top of xfs to crash the system."], "name": "CVE-2016-6198", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/a:redhat:enterprise_mrg:2", "fix_state": "Affected", "package_name": "realtime-kernel", "product_name": "Red Hat Enterprise MRG 2"}], "public_date": "2016-07-11T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2016-6198\nhttps://nvd.nist.gov/vuln/detail/CVE-2016-6198"], "statement": "This issue is not present in the Linux kernel packages as shipped with Red Hat Enterprise Linux versions 5 and 6.\nThis issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 7 and MRG-2. Future Linux kernel updates for the respective releases may address this issue.", "threat_severity": "Moderate"}

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