CVE-2015-2877 | BDVDB-2026-82245 Detail

Description#

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

Impact#

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Exploit#

History#

1. Version 12017-03-03Record published in the CVE List.
2. Version 22024-08-06Most recent update recorded in the CVE List.