Resource exhaustion in Linux Kernel
CVE-2021-3759
A memory overflow vulnerability was found in the Linux kernel’s ipc functionality of the memcg subsystem, in the way a user calls the semget function multiple times, creating semaphores. This flaw allows a local user to starve the resources, causing a denial of service. The highest threat from this vulnerability is to system availability.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (27.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 27.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Linux Kernel
- Debian Linux — versions 10.0
- Kernel — versions Fixed in Linux kernel 5.15-rc1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
- access.redhat.com/security/cve/CVE-2021-3759 (Third Party Advisory)
- lore.kernel.org/linux-mm/1626333284-1404-1-git-send-email-nglaive@gmail.com/
- lists.debian.org/debian-lts-announce/2022/12/msg00031.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-3759?
- CVE-2021-3759 is a medium-severity vulnerability in Linux Kernel, classified under Uncontrolled Resource Consumption. CVSS score: 5.5/10. Published 2022-08-23.
- How severe is CVE-2021-3759?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2021-3759 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.