CVE-2021-3714
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.
Does this matter?
Lower severity and a low EPSS score (1.63%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 5.9 MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 1.63% probability · 76th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-200
- Affected
- linux/linux kernel · redhat/enterprise linux
- Source
- secalert@redhat.com
EPSS 1.6% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://access.redhat.com/security/cve/CVE-2021-3714Third Party Advisory
- https://arxiv.org/abs/2111.08553Third Party Advisory
- https://arxiv.org/pdf/2111.08553.pdfTechnical Description, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1931327Issue Tracking, Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2021-3714Third Party Advisory
- https://arxiv.org/abs/2111.08553Third Party Advisory
- https://arxiv.org/pdf/2111.08553.pdfTechnical Description, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1931327Issue Tracking, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.