{"id":"CVE-2016-9644","url":"https://www.cyber-defence.io/tools/cve/CVE-2016-9644","generatedAt":"2026-10-28T20:56:27.705Z","title":"The __get_user_asm_ex macro in arch/x86/include/asm/uaccess.h in the Linux kernel 4.4.22 through 4.4.28 contains extended asm statements that are incompatible with the exception table, which allows local users to obtain root access on non-SMEP platforms…","description":"The __get_user_asm_ex macro in arch/x86/include/asm/uaccess.h in the Linux kernel 4.4.22 through 4.4.28 contains extended asm statements that are incompatible with the exception table, which allows local users to obtain root access on non-SMEP platforms via a crafted application.  NOTE: this vulnerability exists because of incorrect backporting of the CVE-2016-9178 patch to older kernels.","published":"2016-11-28T03:59:18.000Z","lastModified":"2026-06-17T00:56:24.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.0","score":7.8,"severity":"HIGH","vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},"cwe":["CWE-264"],"affected":["linux/linux kernel"],"epss":{"score":0.01454,"percentile":0.73315,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (1.45%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://www.openwall.com/lists/oss-security/2016/11/07/4","tags":["Mailing List","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/bid/94545","source":"cve@mitre.org"},{"url":"http://www.ubuntu.com/usn/USN-3146-1","source":"cve@mitre.org"},{"url":"http://www.ubuntu.com/usn/USN-3146-2","source":"cve@mitre.org"},{"url":"https://lwn.net/Articles/705220/","tags":["Product"],"source":"cve@mitre.org"},{"url":"http://www.openwall.com/lists/oss-security/2016/11/07/4","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/94545","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-3146-1","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-3146-2","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lwn.net/Articles/705220/","tags":["Product"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2016-9644","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}