What is CVE-2015-2877?

CVE-2015-2877 is a Low severity Linux kernel vulnerability with a CVSS score of 3.3 out of 10, classified as a Information Exposure flaw (CWE-200). CVE-2015-2877 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2015-2877?

CVE-2015-2877 has a CVSS score of 3.3 out of 10, rated Low severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

Is there a patch available for CVE-2015-2877?

No patch is currently available for CVE-2015-2877. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2015-2877 actively exploited?

CVE-2015-2877 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Information Exposure (CWE-200)?

The product exposes sensitive information to an actor not authorised to see it. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/200.html

CVE-2015-2877

Low

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

Package Linux Kernel

Published 2017-03-03

Last modified 2026-05-13

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

3.3

out of 10

Low

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Weakness type

CWE-200

CVE-2015-2877 is a Information Exposure vulnerability

What is Information Exposure?

The product exposes sensitive information to an actor not authorised to see it. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2015-2877 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Antoniobarresi
http://www.antoniobarresi.com/files/cain_advisory.txt

Technical Description Third Party Advisory
Kb
http://www.kb.cert.org/vuls/id/935424

Third Party Advisory US Government Resource
Securityfocus
http://www.securityfocus.com/bid/76256

Third Party Advisory VDB Entry
Red Hat
https://bugzilla.redhat.com/show_bug.cgi?id=1252096

Issue Tracking Third Party Advisory
Kb
https://www.kb.cert.org/vuls/id/BGAR-A2CNKG

Third Party Advisory US Government Resource
Kb
https://www.kb.cert.org/vuls/id/BLUU-9ZAHZH

Third Party Advisory US Government Resource
Usenix
https://www.usenix.org/system/files/conference/woot15/woot15-paper-barresi.pdf

Technical Description Third Party Advisory

Details

CVE ID CVE-2015-2877

Severity Low

CVSS score 3.3 / 10

CVSS version 3.1

Published 2017-03-03

Modified 2026-05-13

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2015-2877?

CVE-2015-2877 is a Low severity Linux kernel vulnerability with a CVSS score of 3.3 out of 10 , classified as an Information Exposure flaw (CWE-200) . CVE-2015-2877 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2015-2877?

CVE-2015-2877 has a CVSS score of 3.3 out of 10, rated Low severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
Is there a patch available for CVE-2015-2877?

No patch is currently available for CVE-2015-2877. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2015-2877 actively exploited?

No — CVE-2015-2877 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Information Exposure (CWE-200)?

The product exposes sensitive information to an actor not authorised to see it. View CWE-200 on MITRE CWE →