Vulnerability in Linux Kernel
CVE-2021-4002
A memory leak flaw in the Linux kernel's hugetlbfs memory usage was found in the way the user maps some regions of memory twice using shmget() which are aligned to PUD alignment with the fault of some of the memory pages. A local user could use this flaw to get unauthorized access to some data.
EPSS: 0.005 (40.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.
Affected products
- Linux Linux_kernel — versions 5.16
- Oracle Communications_cloud_native_core_binding_support_function — versions 22.1.3
- Oracle Communications_cloud_native_core_network_exposure_function — versions 22.1.1
- Oracle Communications_cloud_native_core_policy — versions 22.2.0
- Debian Debian_linux — versions 9.0, 10.0
- Fedoraproject Fedora — versions 35
- N/a Kernel — versions affects kernel v3.6 and later through v5.15.5.
Weakness classification (CWE)
References
- secalert@redhat.com (Third Party Advisory, x_refsource_MISC, Issue Tracking)
- secalert@redhat.com (Exploit, Mailing List, Third Party Advisory, x_refsource_MISC)
- secalert@redhat.com (Patch, x_refsource_MISC, Vendor Advisory)
- secalert@redhat.com (Patch, x_refsource_MISC, Vendor Advisory)
- secalert@redhat.com (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- secalert@redhat.com (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- secalert@redhat.com (vendor-advisory, Third Party Advisory, x_refsource_DEBIAN)
- secalert@redhat.com (Patch, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-4002?
- CVE-2021-4002 is a medium-severity vulnerability in Linux Kernel, classified under Incomplete Cleanup. CVSS score: 4.4/10. Published 2022-03-03.
- How severe is CVE-2021-4002?
- Medium severity. CVSS v3 base score is 4.4 out of 10.