{"id":"CVE-2015-2877","details":"Kernel Samepage Merging (KSM) in the Linux kernel 2.6.32 through 4.x does not prevent use of a write-timing side channel, which allows guest OS users to defeat the ASLR protection mechanism on other guest OS instances via a Cross-VM ASL INtrospection (CAIN) attack.  NOTE: the vendor states \"Basically if you care about this attack vector, disable deduplication.\" Share-until-written approaches for memory conservation among mutually untrusting tenants are inherently detectable for information disclosure, and can be classified as potentially misunderstood behaviors rather than vulnerabilities","modified":"2026-04-10T03:46:15.580574Z","published":"2017-03-03T11:59:00Z","database_specific":{"isDisputed":true},"references":[{"type":"ADVISORY","url":"http://www.antoniobarresi.com/files/cain_advisory.txt"},{"type":"ADVISORY","url":"http://www.kb.cert.org/vuls/id/935424"},{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/76256"},{"type":"ADVISORY","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1252096"},{"type":"ADVISORY","url":"https://www.kb.cert.org/vuls/id/BGAR-A2CNKG"},{"type":"ADVISORY","url":"https://www.kb.cert.org/vuls/id/BLUU-9ZAHZH"},{"type":"ADVISORY","url":"https://www.usenix.org/system/files/conference/woot15/woot15-paper-barresi.pdf"},{"type":"ARTICLE","url":"http://www.antoniobarresi.com/files/cain_advisory.txt"},{"type":"ARTICLE","url":"https://www.usenix.org/system/files/conference/woot15/woot15-paper-barresi.pdf"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1252096"},{"type":"WEB","url":"http://www.kb.cert.org/vuls/id/935424"},{"type":"WEB","url":"https://www.kb.cert.org/vuls/id/BGAR-A2CNKG"},{"type":"WEB","url":"https://www.kb.cert.org/vuls/id/BLUU-9ZAHZH"}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"}]}