{"id":"CVE-2022-0847","kind":"vulnerability","aliases":["CVE-2022-0847"],"related":[],"title":"Linux Kernel: Linux Kernel Privilege Escalation Vulnerability","description":"A flaw was found in the way the \"flags\" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe and push_pipe functions in the Linux kernel and could thus contain stale values. An unprivileged local user could use this flaw to write to pages in the page cache backed by read only files and as such escalate their privileges on the system.","summary":"A flaw in the Linux kernel's pipe handling (\"Dirty Pipe\") lets an unprivileged local user gain root privileges. It is listed as actively exploited in the wild by CISA.","severity":"high","cvss":7.8,"epss":0.92795,"exploited":true,"exploited_at":"2022-04-25T00:00:00+00:00","products":[{"name":"Linux Kernel","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","infrastructure","kubernetes","linux","self-hosted"],"not_affected_if":["patched-kernel"],"how_to_check":"uname -r and compare against the patched kernel releases for your distribution (unknown in sources)","fix":"Update the Linux kernel to a patched release from your distribution (CISA: apply updates per vendor instructions); reboot after install.","status":"open","published_at":"2022-03-10T17:44:57+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:17:41+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"infrastructure","confidence":0.8,"triage":{"at":"2026-10-23T21:17:41Z","model":"claude-haiku-5-5","output":{"fix":"Update the Linux kernel to a patched release from your distribution (CISA: apply updates per vendor instructions); reboot after install.","reach":"local","impact":"high","summary":"A flaw in the Linux kernel's pipe handling (\"Dirty Pipe\") lets an unprivileged local user gain root privileges. It is listed as actively exploited in the wild by CISA.","category":"infrastructure","who_cares":["linux","self-hosted","kubernetes"],"confidence":0.8,"needs_auth":"yes","worst_case":"Local unprivileged user gains root on the host machine.","analyst_note":"Confirm the patched kernel versions per distribution and the affected version range from the vendor advisories; the sources here do not list them.","how_to_check":"uname -r and compare against the patched kernel releases for your distribution (unknown in sources)\nunknown","needs_analyst":true,"not_affected_if":["patched-kernel"],"user_interaction":"no","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000463,"input_tokens":2837,"output_tokens":359,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-0847':10A,13A '-2022':9A,12A 'activ':46B 'back':109C 'buffer':67C 'cach':108C 'cisa':52B 'contain':90C 'copi':74C 'could':88C,97C 'cve':8A,11A 'dirti':32B 'escal':6A,117C 'exploit':16B,47B 'file':113C 'flag':61C 'flaw':24B,54C,100C 'found':56C 'function':82C 'gain':39B 'handl':31B 'host':22B 'infrastructur':17B 'initi':72C 'iter':77C 'kernel':2A,4A,15A,28B,86C 'kubernet':18B 'lack':70C 'let':34B 'linux':1A,3A,14A,19B,27B,85C 'list':44B 'local':37B,95C 'member':62C 'new':65C 'page':75C,104C,107C 'pipe':30B,33B,66C,78C,81C 'privileg':5A,41B,119C 'proper':71C 'push':80C 'read':111C 'root':40B 'self':21B 'self-host':20B 'stale':91C 'structur':68C 'system':122C 'thus':89C 'unprivileg':36B,94C 'use':98C 'user':38B,96C 'valu':92C 'vulner':7A 'way':59C 'wild':50B 'write':102C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2022-03-10T17:44:57+00:00","kev":{"dateAdded":"2022-04-25","dueDate":"2022-05-16","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2022-0847","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2022-0847","severity":null,"published_at":"2022-04-25T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T10:39:06+00:00","note":null},{"source":"epss","external_id":"CVE-2022-0847","url":"https://api.first.org/data/v1/epss?cve=CVE-2022-0847","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:45+00:00","fetched_at":"2026-10-23T19:13:45+00:00","note":null},{"source":"nvd","external_id":"CVE-2022-0847","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-0847","severity":null,"published_at":"2022-03-10T17:44:57+00:00","modified_at":"2026-06-17T04:21:21+00:00","first_seen_at":"2026-10-23T21:57:35+00:00","fetched_at":"2026-10-23T21:57:35+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}