{"id":"CVE-2014-7843","aliases":["DEBIAN-CVE-2014-7843","EUVD-2014-7697","GHSA-8973-h52f-9cxp","UBUNTU-CVE-2014-7843","USN-2466-1","USN-2467-1"],"status":"published","title":"The __clear_user function in arch/arm64/lib/clear_user.S in the Linux kernel before 3.17.4 on the...","description":"The __clear_user function in arch/arm64/lib/clear_user.S in the Linux kernel before 3.17.4 on the ARM64 platform allows local users to cause a denial of service (system crash) by reading one byte beyond a /dev/zero page boundary.","severity":{"version":"2.0","score":4.9,"vector":"AV:L/AC:L/Au:N/C:N/I:N/A:C","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.00374,"percentile":0.31554,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-17"],"published":"2014-11-29T00:00:00Z","modified":"2026-10-23T15:47:27Z","fixes":[{"ecosystem":"Debian:12","package":"linux","fixed_in":["3.16.7-ckt2-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"linux","fixed_in":["3.16.7-ckt2-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"linux","fixed_in":["3.16.7-ckt2-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:14.04:LTS","package":"linux","fixed_in":["3.13.0-44.73"],"sources":["osv"]},{"ecosystem":"Ubuntu:14.04:LTS","package":"linux-lts-utopic","fixed_in":["3.16.0-29.39~14.04.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"linux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.16.7-ckt2-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"linux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.16.7-ckt2-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"linux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.16.7-ckt2-1"}]}]},{"source":"osv","ecosystem":"Ubuntu:14.04:LTS","package":"linux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.13.0-44.73"}]}],"versions":["3.11.0-12.19","3.12.0-1.3","3.12.0-2.5","3.12.0-2.7","3.12.0-3.8","3.12.0-3.9","3.12.0-4.10","3.12.0-4.12","3.12.0-5.13","3.12.0-7.15","3.13.0-1.16","3.13.0-2.17","3.13.0-3.18","3.13.0-4.19","3.13.0-5.20","3.13.0-6.23","3.13.0-7.25","3.13.0-7.26","3.13.0-8.27","3.13.0-8.28","3.13.0-10.30","3.13.0-11.31","3.13.0-12.32","3.13.0-13.33","3.13.0-14.34","3.13.0-15.35","3.13.0-16.36","3.13.0-17.37","3.13.0-18.38","3.13.0-19.39","3.13.0-19.40","3.13.0-20.42","3.13.0-21.43","3.13.0-22.44","3.13.0-23.45","3.13.0-24.46","3.13.0-24.47","3.13.0-27.50","3.13.0-29.53","3.13.0-30.54","3.13.0-30.55","3.13.0-32.57","3.13.0-33.58","3.13.0-34.60","3.13.0-35.62","3.13.0-36.63","3.13.0-37.64","3.13.0-39.66","3.13.0-40.69","3.13.0-41.70","3.13.0-43.72"]},{"source":"osv","ecosystem":"Ubuntu:14.04:LTS","package":"linux-lts-utopic","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.16.0-29.39~14.04.1"}]}],"versions":["3.16.0-25.33~14.04.2","3.16.0-26.35~14.04.1","3.16.0-28.37~14.04.1","3.16.0-28.38~14.04.1"]},{"source":"osv","ecosystem":"Ubuntu:14.04:LTS","package":"linux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.13.0-44.73"}]}],"versions":["3.11.0-12.19","3.12.0-1.3","3.12.0-2.5","3.12.0-2.7","3.12.0-3.8","3.12.0-3.9","3.12.0-4.10","3.12.0-4.12","3.12.0-5.13","3.12.0-7.15","3.13.0-1.16","3.13.0-2.17","3.13.0-3.18","3.13.0-4.19","3.13.0-5.20","3.13.0-6.23","3.13.0-7.25","3.13.0-7.26","3.13.0-8.27","3.13.0-8.28","3.13.0-10.30","3.13.0-11.31","3.13.0-12.32","3.13.0-13.33","3.13.0-14.34","3.13.0-15.35","3.13.0-16.36","3.13.0-17.37","3.13.0-18.38","3.13.0-19.39","3.13.0-19.40","3.13.0-20.42","3.13.0-21.43","3.13.0-22.44","3.13.0-23.45","3.13.0-24.46","3.13.0-24.47","3.13.0-27.50","3.13.0-29.53","3.13.0-30.54","3.13.0-30.55","3.13.0-32.57","3.13.0-33.58","3.13.0-34.60","3.13.0-35.62","3.13.0-36.63","3.13.0-37.64","3.13.0-39.66","3.13.0-40.69","3.13.0-41.70","3.13.0-43.72"],"bundled":4},{"source":"osv","ecosystem":"Ubuntu:14.04:LTS","package":"linux-lts-utopic","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.16.0-29.39~14.04.1"}]}],"versions":["3.16.0-25.33~14.04.2","3.16.0-26.35~14.04.1","3.16.0-28.37~14.04.1","3.16.0-28.38~14.04.1"],"bundled":4}],"products":[{"vendor":"linux","product":"linux_kernel"}],"references":[{"url":"http://www.openwall.com/lists/oss-security/2014/11/13/5","tags":["mailing-list","x_refsource_MLIST","x_transferred","web"]},{"url":"https://github.com/torvalds/linux/commit/97fc15436b36ee3956efad83e22a557991f7d19d","tags":["x_refsource_CONFIRM","x_transferred","Patch","Vendor Advisory","advisory","fix"]},{"url":"http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=97fc15436b36ee3956efad83e22a557991f7d19d","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1163744","tags":["x_refsource_CONFIRM","x_transferred","Patch","Vendor Advisory","advisory","fix","report"]},{"url":"http://www.securityfocus.com/bid/71082","tags":["vdb-entry","x_refsource_BID","x_transferred","web"]},{"url":"http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.17.4","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory"]},{"url":"http://secunia.com/advisories/62305","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2014-7843"},{"url":"http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=97fc15436b36ee3956efad83e22a557991f7d19d"},{"url":"https://github.com/advisories/GHSA-8973-h52f-9cxp"},{"url":"https://security-tracker.debian.org/tracker/CVE-2014-7843","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2014-7843","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-2465-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/notices/USN-2466-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/notices/USN-2467-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/notices/USN-2468-1","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2014-7843","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2014-7841","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2014-7842","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2014-8884","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2014-7843","description":"The __clear_user function in arch/arm64/lib/clear_user.S in the Linux kernel before 3.17.4 on the ARM64 platform allows local users to cause a denial of service (system crash) by reading one byte beyond a /dev/zero page boundary.","status":"published","published":"2014-11-30T01:00:00Z","modified":"2024-08-06T13:03:27.617Z","updated_at":"2026-11-02T14:33:46.955592Z"}],"euvd":[{"id":"EUVD-2014-7697","description":"The __clear_user function in arch/arm64/lib/clear_user.S in the Linux kernel before 3.17.4 on the ARM64 platform allows local users to cause a denial of service (system crash) by reading one byte beyond a /dev/zero page boundary.","status":"published","published":"2014-11-30T01:00:00Z","modified":"2024-08-06T13:03:27Z","updated_at":"2026-11-03T01:56:53.794428Z"}],"ghsa":[{"id":"GHSA-8973-h52f-9cxp","title":"The __clear_user function in arch/arm64/lib/clear_user.S in the Linux kernel before 3.17.4 on the...","description":"The __clear_user function in arch/arm64/lib/clear_user.S in the Linux kernel before 3.17.4 on the ARM64 platform allows local users to cause a denial of service (system crash) by reading one byte beyond a /dev/zero page boundary.","status":"published","published":"2022-05-17T04:17:01Z","modified":"2023-02-13T03:31:16Z","updated_at":"2026-11-02T14:54:06.501947Z"}],"nvd":[{"id":"CVE-2014-7843","description":"The __clear_user function in arch/arm64/lib/clear_user.S in the Linux kernel before 3.17.4 on the ARM64 platform allows local users to cause a denial of service (system crash) by reading one byte beyond a /dev/zero page boundary.","status":"published","published":"2014-11-30T01:59:05.57Z","modified":"2026-06-17T00:15:48.773Z","cvss":[{"version":"2.0","score":4.9,"vector":"AV:L/AC:L/Au:N/C:N/I:N/A:C","level":"medium","assessor":"primary"}],"cwes":["CWE-17"],"updated_at":"2026-11-02T14:02:57.304171Z"}],"osv":[{"id":"CVE-2014-7843","description":"The __clear_user function in arch/arm64/lib/clear_user.S in the Linux kernel before 3.17.4 on the ARM64 platform allows local users to cause a denial of service (system crash) by reading one byte beyond a /dev/zero page boundary.","status":"published","published":"2014-11-30T01:59:05Z","modified":"2026-04-10T03:44:01.411051Z","updated_at":"2026-11-02T15:43:59.654289Z"},{"id":"DEBIAN-CVE-2014-7843","description":"The __clear_user function in arch/arm64/lib/clear_user.S in the Linux kernel before 3.17.4 on the ARM64 platform allows local users to cause a denial of service (system crash) by reading one byte beyond a /dev/zero page boundary.","status":"published","published":"2014-11-30T01:59:05.57Z","modified":"2026-10-23T15:47:27.031387886Z","updated_at":"2026-11-02T15:45:26.442161Z"},{"id":"UBUNTU-CVE-2014-7843","description":"The __clear_user function in arch/arm64/lib/clear_user.S in the Linux kernel before 3.17.4 on the ARM64 platform allows local users to cause a denial of service (system crash) by reading one byte beyond a /dev/zero page boundary.","status":"published","published":"2014-11-29T00:00:00Z","modified":"2026-04-22T09:49:48.310218Z","updated_at":"2026-11-02T15:54:09.378953Z"},{"id":"USN-2466-1","title":"linux vulnerabilities","description":"A null pointer dereference flaw was discovered in the the Linux kernel's\nSCTP implementation when ASCONF is used. A remote attacker could exploit\nthis flaw to cause a denial of service (system crash) via a malformed INIT\nchunk. (CVE-2014-7841)\n\nA race condition with MMIO and PIO transactions in the KVM (Kernel Virtual\nMachine) subsystem of the Linux kernel was discovered. A guest OS user\ncould exploit this flaw to cause a denial of service (guest OS crash) via a\nspecially crafted application. (CVE-2014-7842)\n\nMiloš Prchlík reported a flaw in how the ARM64 platform handles a single\nbyte overflow in __clear_user. A local user could exploit this flaw to\ncause a denial of service (system crash) by reading one byte beyond a\n/dev/zero page boundary. (CVE-2014-7843)\n\nA stack buffer overflow was discovered in the ioctl command handling for\nthe Technotrend/Hauppauge USB DEC devices driver. A local user could\nexploit this flaw to cause a denial of service (system crash) or possibly\ngain privileges. (CVE-2014-8884)\n","status":"published","published":"2015-01-13T12:07:58Z","modified":"2026-04-22T09:05:28.308178Z","updated_at":"2026-11-02T16:58:09.227524Z"},{"id":"USN-2467-1","title":"linux-lts-utopic vulnerabilities","description":"A null pointer dereference flaw was discovered in the the Linux kernel's\nSCTP implementation when ASCONF is used. A remote attacker could exploit\nthis flaw to cause a denial of service (system crash) via a malformed INIT\nchunk. (CVE-2014-7841)\n\nA race condition with MMIO and PIO transactions in the KVM (Kernel Virtual\nMachine) subsystem of the Linux kernel was discovered. A guest OS user\ncould exploit this flaw to cause a denial of service (guest OS crash) via a\nspecially crafted application. (CVE-2014-7842)\n\nMiloš Prchlík reported a flaw in how the ARM64 platform handles a single\nbyte overflow in __clear_user. A local user could exploit this flaw to\ncause a denial of service (system crash) by reading one byte beyond a\n/dev/zero page boundary. (CVE-2014-7843)\n\nA stack buffer overflow was discovered in the ioctl command handling for\nthe Technotrend/Hauppauge USB DEC devices driver. A local user could\nexploit this flaw to cause a denial of service (system crash) or possibly\ngain privileges. (CVE-2014-8884)\n","status":"published","published":"2015-01-13T12:16:45Z","modified":"2026-02-10T04:40:51Z","updated_at":"2026-11-02T16:58:09.227524Z"}]}}