CVE-2015-2877 Information disclosure in n/a

What is CVE-2015-2877?

CVE-2015-2877 is a low-severity vulnerability in Linux kernel, published on 3 Mar 2017. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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

Weakness: CWE-200

Which versions are affected by CVE-2015-2877?

It affects 2 products.

Products include Linux kernel, Redhat Enterprise Linux.

How do I fix CVE-2015-2877?

No fix has been published for CVE-2015-2877 yet. Limit exposure of the affected software until one is available.

Is CVE-2015-2877 being exploited?

There is no known exploitation of CVE-2015-2877 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2015-2877, DEBIAN-CVE-2015-2877, GHSA-4pm5-34cf-2v36.