Information disclosure in Linux Kernel
CVE-2021-3714
A flaw was found in the Linux kernels memory deduplication mechanism. Previous work has shown that memory deduplication can be attacked via a local exploitation mechanism. The same technique can be used if an attacker can upload page sized files and detect the change in access time from a networked service to determine if the page has been merged.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.015 (73.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 73.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: +0.000
Affected products
- Linux Kernel
- Red Hat Enterprise Linux — versions 6.0, 7.0, 8.0
- Kernel — versions Not known
Weakness classification (CWE)
Public proof-of-concept exploits
References
- arxiv.org/abs/2111.08553 (Third Party Advisory)
- arxiv.org/pdf/2111.08553.pdf (Technical Description, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
- access.redhat.com/security/cve/CVE-2021-3714 (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-3714?
- CVE-2021-3714 is a medium-severity vulnerability in Linux Kernel, classified under Information Disclosure. CVSS score: 5.9/10. Published 2022-08-23.
- How severe is CVE-2021-3714?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2021-3714 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.