{"id":"CVE-2016-5195","published":"2016-11-10T21:59:00Z","modified":"2026-06-17T00:48:56Z","title":"Linux Kernel Race Condition Vulnerability","vendor":"Linux","product":"Kernel","tier":"core","eol":null,"description":{"text":"Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect handling of a copy-on-write (COW) feature to write to a read-only memory mapping, as exploited in the wild in October 2016, aka \"Dirty COW.\"","provenance":"source","from":"NVD"},"summary":{"text":"The Linux kernel's memory management code in mm/gup.c, in versions 2.x through 4.x before 4.8.3, contains a race condition in its handling of the copy-on-write (COW) feature. A local user with low privileges can exploit this to write to a read-only memory mapping and gain elevated privileges, requiring local access and an attacker who can run code on the system.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-29T08:32:02Z"},"cvss":{"score":7.0,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.83524,"percentile":0.99684,"date":"2026-10-29","provenance":"source"},"kev":{"dateAdded":"2022-03-03","dueDate":"2022-03-24","ransomware":false,"requiredAction":"Apply updates per vendor instructions.","notes":"https://nvd.nist.gov/vuln/detail/CVE-2016-5195","provenance":"source"},"vulncheckKev":{"dateAdded":"2016-10-18","exploitedFirstSeen":"2016-10-18","ransomware":false,"evidence":[{"url":"https://docs.google.com/spreadsheets/d/1lkNJ0uQwbeC1ZTRrxdtuPLCIl7mlUreoKfSIgajnSyY/edit","date":"2016-10-18"},{"url":"https://www.cve.org/CVERecord?id=CVE-2016-5195","date":"2016-11-10"},{"url":"https://nvd.nist.gov/vuln/detail/cve-2016-5195","date":"2017-10-11"},{"url":"https://dl.acm.org/doi/pdf/10.1145/3465481.3465758","date":"2021-08-17"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2022-03-03"},{"url":"https://www.akamai.com/blog/security-research/new-sophisticated-magento-campaign-xurum-webshell","date":"2023-08-09"},{"url":"https://www.trendmicro.com/en_us/research/24/c/earth-krahang.html","date":"2024-03-18"},{"url":"https://web-assets.esetstatic.com/wls/en/papers/white-papers/ebury-is-alive-but-unseen.pdf","date":"2024-05-15"},{"url":"https://unit42.paloaltonetworks.com/infiltration-of-global-telecom-networks/","date":"2025-07-29"},{"url":"https://www.crowdstrike.com/explore/2025-threat-hunt-report","date":"2025-08-04"}],"evidenceTotal":14,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev | Oct 29, 2026","url":"https://otx.alienvault.com/pulse/6ae20c1db17e7057ae7d9ad1","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 28, 2026","url":"https://otx.alienvault.com/pulse/6ae0ba7e0e2a97ff7b218819","created":"2026-10-27"},{"name":"Actively_Exploited_Kev | Oct 27, 2026","url":"https://otx.alienvault.com/pulse/6adf68b85c3e852f3c111d18","created":"2026-10-26"},{"name":"Actively_Exploited_Kev | Oct 24, 2026","url":"https://otx.alienvault.com/pulse/6adb740e397c3ad4799aa4cd","created":"2026-10-23"},{"name":"Actively_Exploited_Kev | Oct 23, 2026","url":"https://otx.alienvault.com/pulse/6ada236fcfba2dfa730ea482","created":"2026-10-22"},{"name":"Actively_Exploited_Kev | Oct 22, 2026","url":"https://otx.alienvault.com/pulse/6ad8d33a077cbb5cab524d80","created":"2026-10-21"},{"name":"Actively_Exploited_Kev | Oct 21, 2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"},{"name":"Actively_Exploited_Kev | Oct 20, 2026","url":"https://otx.alienvault.com/pulse/6ad62f63c24a405a3423cc13","created":"2026-10-19"},{"name":"Actively_Exploited_Kev | Oct 19, 2026","url":"https://otx.alienvault.com/pulse/6ad4dda174e5797d0bd238b7","created":"2026-10-18"},{"name":"Actively_Exploited_Kev | Oct 18, 2026","url":"https://otx.alienvault.com/pulse/6ad38c22e1848f8189d1c121","created":"2026-10-17"}],"provenance":"machine"},"cwes":[{"id":"CWE-362","name":"Concurrent Execution using Shared Resource with Improper Synchronization"}],"references":[{"url":"http://fortiguard.com/advisory/FG-IR-16-063","tags":["Third Party Advisory"]},{"url":"http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=19be0eaffa3ac7d8eb6784ad9bdbc7d67ed8e619","tags":["Issue Tracking","Patch","Vendor Advisory"]},{"url":"http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10770","tags":["Third Party Advisory"]},{"url":"http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10774","tags":["Third Party 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