{"id":"CVE-2022-0492","published":"2022-03-03T19:15:08Z","modified":"2026-06-17T04:20:42Z","title":"Linux Kernel Improper Authentication Vulnerability","vendor":"Linux","product":"Kernel","tier":"core","eol":null,"description":{"text":"A vulnerability was found in the Linux kernel’s cgroup_release_agent_write in the kernel/cgroup/cgroup-v1.c function. This flaw, under certain circumstances, allows the use of the cgroups v1 release_agent feature to escalate privileges and bypass the namespace isolation unexpectedly.","provenance":"source","from":"NVD"},"summary":{"text":"The Linux kernel's cgroup_release_agent_write function in kernel/cgroup/cgroup-v1.c contains an improper authentication flaw affecting the cgroups v1 release_agent feature. An attacker with local access and low privileges, requiring no user interaction, can exploit the flaw under certain circumstances to escalate privileges and break out of namespace isolation.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:11:26Z"},"cvss":{"score":7.8,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.05528,"percentile":0.92793,"date":"2026-10-29","provenance":"source"},"kev":{"dateAdded":"2026-06-02","dueDate":"2026-06-05","ransomware":false,"requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","notes":"This vulnerability affects a common open-source component, third-party library, or a protocol used by different products. Please check with specific vendors for information on patching status. For more information, please see: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=24f6008564183aa120d07c03d9289519c2fe02af ; https://www.kernel.org/ ; https://nvd.nist.gov/vuln/detail/CVE-2022-0492","provenance":"source"},"vulncheckKev":{"dateAdded":"2026-06-01","exploitedFirstSeen":"2026-06-01","ransomware":false,"evidence":[{"url":"https://securelist.com/container-attack-vectors/120010/","date":"2026-06-01"},{"url":"https://vulnerability.circl.lu/known-exploited-vulnerabilities-catalog/24c752e3-fa89-4224-8712-5e6a98561da6","date":"2026-06-02"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2026-06-02"},{"url":"https://www.recordedfuture.com/blog/june-2026-cve-landscape","date":"2026-07-10"}],"evidenceTotal":4,"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-862","name":"Missing Authorization"},{"id":"CWE-287","name":"Improper Authentication"}],"references":[{"url":"http://packetstormsecurity.com/files/166444/Kernel-Live-Patch-Security-Notice-LSN-0085-1.html","tags":["Third Party Advisory","VDB Entry"]},{"url":"http://packetstormsecurity.com/files/167386/Kernel-Live-Patch-Security-Notice-LSN-0086-1.html","tags":["Third Party Advisory","VDB Entry"]},{"url":"http://packetstormsecurity.com/files/176099/Docker-cgroups-Container-Escape.html","tags":["Exploit","VDB Entry"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2051505","tags":["Issue Tracking","Patch","Third Party Advisory"]},{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=24f6008564183aa120d07c03d9289519c2fe02af","tags":["Patch","Vendor Advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html","tags":["Mailing List","Third Party Advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html","tags":["Mailing List","Third Party Advisory"]},{"url":"https://security.netapp.com/advisory/ntap-20220419-0002/","tags":["Third Party Advisory"]},{"url":"https://www.debian.org/security/2022/dsa-5095","tags":["Third Party Advisory"]},{"url":"https://www.debian.org/security/2022/dsa-5096","tags":["Third Party Advisory"]},{"url":"http://packetstormsecurity.com/files/166444/Kernel-Live-Patch-Security-Notice-LSN-0085-1.html","tags":["Third Party Advisory","VDB Entry"]},{"url":"http://packetstormsecurity.com/files/167386/Kernel-Live-Patch-Security-Notice-LSN-0086-1.html","tags":["Third Party Advisory","VDB Entry"]},{"url":"http://packetstormsecurity.com/files/176099/Docker-cgroups-Container-Escape.html","tags":["Exploit","VDB Entry"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2051505","tags":["Issue Tracking","Patch","Third Party Advisory"]},{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=24f6008564183aa120d07c03d9289519c2fe02af","tags":["Patch","Vendor Advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html","tags":["Mailing List","Third Party Advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html","tags":["Mailing List","Third Party Advisory"]},{"url":"https://security.netapp.com/advisory/ntap-20220419-0002/","tags":["Third Party Advisory"]},{"url":"https://www.debian.org/security/2022/dsa-5095","tags":["Third Party Advisory"]},{"url":"https://www.debian.org/security/2022/dsa-5096","tags":["Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-0492","tags":["US Government Resource"]}],"techniques":[{"id":"T1068","name":"Exploitation for Privilege Escalation","tactics":["privilege-escalation"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: local privilege escalation via cgroup release_agent","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"allows the use of the cgroups v1 release_agent feature to escalate privileges","start":158,"end":235}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1611","name":"Escape to Host","tactics":["privilege-escalation"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: escapes container namespace isolation to host","mappingType":"primary_impact","evidence":[{"from":"description","quote":"bypass the namespace isolation unexpectedly","start":240,"end":283}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2022-15629","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2022-15629","exploited":true,"exploitedSince":"2026-06-02","provenance":"source"},"exploits":[],"exploitSources":{"pocGithub":{"count":7,"skipped":1,"earliest":"2022-02-28","earliestUrl":"https://github.com/PaloAltoNetworks/can-ctr-escape-cve-2022-0492","repos":[{"name":"PaloAltoNetworks/can-ctr-escape-cve-2022-0492","url":"https://github.com/PaloAltoNetworks/can-ctr-escape-cve-2022-0492","stars":46,"created":"2022-02-28"},{"name":"chenaotian/CVE-2022-0492","url":"https://github.com/chenaotian/CVE-2022-0492","stars":35,"created":"2022-03-11"},{"name":"SofianeHamlaoui/CVE-2022-0492-Checker","url":"https://github.com/SofianeHamlaoui/CVE-2022-0492-Checker","stars":13,"created":"2022-03-06"},{"name":"T1erno/CVE-2022-0492-Docker-Breakout-Checker-and-PoC","url":"https://github.com/T1erno/CVE-2022-0492-Docker-Breakout-Checker-and-PoC","stars":8,"created":"2023-02-18"},{"name":"KianaBin/CVE-2022-0492-Container-Escape","url":"https://github.com/KianaBin/CVE-2022-0492-Container-Escape","stars":2,"created":"2022-08-27"}]},"metasploit":[{"name":"Docker cgroups Container Escape","module":"exploit/linux/local/docker_cgroup_escape","type":"exploit","disclosureDate":"2022-02-04","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/local/docker_cgroup_escape.rb"}],"first":{"date":"2022-02-04","source":"Metasploit","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/local/docker_cgroup_escape.rb"},"provenance":"source"},"exploitRefs":["http://packetstormsecurity.com/files/176099/Docker-cgroups-Container-Escape.html","http://packetstormsecurity.com/files/166444/Kernel-Live-Patch-Security-Notice-LSN-0085-1.html","http://packetstormsecurity.com/files/167386/Kernel-Live-Patch-Security-Notice-LSN-0086-1.html"],"flow":[{"stage":"exploitation","techniques":["T1068"],"provenance":"ai"},{"stage":"primary","techniques":["T1611"],"provenance":"ai"}],"timeline":[{"date":"2022-02-04","kind":"exploit-public","label":"First public exploit: Metasploit; later: PoC-in-GitHub 2022-02-28","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/local/docker_cgroup_escape.rb","provenance":"source"},{"date":"2022-03-03","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-0492","provenance":"source"},{"date":"2026-06-01","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://securelist.com/container-attack-vectors/120010/","provenance":"source"},{"date":"2026-06-02","kind":"kev","label":"Added to CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2026-06-02","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2022-15629","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":"Metasploit","daysToKev":1552},"priority":{"score":72.0,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in CISA KEV and VulnCheck KEV"},{"name":"Recent KEV listing","points":5.0,"detail":"added 150 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":18.56,"detail":"percentile 0.9279"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"1 NVD reference tagged Exploit; 2 NVD exploit links; 7 PoC-in-GitHub repos; 1 Metasploit module"},{"name":"Mentioned in OTX pulses","points":3.0,"detail":"50 pulses"},{"name":"CVSS severity","points":5.46,"detail":"base score 7.8"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}