CVE-2021-4002
Linux kernel Hugetlbfs PUD Aligned Memory Mapping Vulnerability (Local Privilege Escalation)
Description
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.
INFO
Published Date :
March 3, 2022, 10:15 p.m.
Last Modified :
Feb. 22, 2023, 5:46 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
2.5
Exploitability Score :
1.8
Affected Products
The following products are affected by CVE-2021-4002
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-4002.
| URL | Resource |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=2025726 | Issue Tracking Third Party Advisory |
| https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=13e4ad2ce8df6e058ef482a31fdd81c725b0f7ea | Patch Vendor Advisory |
| https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a4a118f2eead1d6c49e00765de89878288d4b890 | Patch Vendor Advisory |
| https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html | Mailing List Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html | Mailing List Third Party Advisory |
| https://www.debian.org/security/2022/dsa-5096 | Third Party Advisory |
| https://www.openwall.com/lists/oss-security/2021/11/25/1 | Exploit Mailing List Third Party Advisory |
| https://www.oracle.com/security-alerts/cpujul2022.html | Patch Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-4002 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-4002 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Feb. 22, 2023
Action Type Old Value New Value Changed Reference Type https://www.oracle.com/security-alerts/cpujul2022.html No Types Assigned https://www.oracle.com/security-alerts/cpujul2022.html Patch, Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:22.1.3:*:*:*:*:*:*:* *cpe:2.3:a:oracle:communications_cloud_native_core_network_exposure_function:22.1.1:*:*:*:*:*:*:* *cpe:2.3:a:oracle:communications_cloud_native_core_policy:22.2.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Jul. 25, 2022
Action Type Old Value New Value Added Reference https://www.oracle.com/security-alerts/cpujul2022.html [No Types Assigned] -
Initial Analysis by [email protected]
Mar. 16, 2022
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:P/I:P/A:N) Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=2025726 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=2025726 Issue Tracking, Third Party Advisory Changed Reference Type https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=13e4ad2ce8df6e058ef482a31fdd81c725b0f7ea No Types Assigned https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=13e4ad2ce8df6e058ef482a31fdd81c725b0f7ea Patch, Vendor Advisory Changed Reference Type https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a4a118f2eead1d6c49e00765de89878288d4b890 No Types Assigned https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a4a118f2eead1d6c49e00765de89878288d4b890 Patch, Vendor Advisory Changed Reference Type https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html No Types Assigned https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html Mailing List, Third Party Advisory Changed Reference Type https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html No Types Assigned https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html Mailing List, Third Party Advisory Changed Reference Type https://www.debian.org/security/2022/dsa-5096 No Types Assigned https://www.debian.org/security/2022/dsa-5096 Third Party Advisory Changed Reference Type https://www.openwall.com/lists/oss-security/2021/11/25/1 No Types Assigned https://www.openwall.com/lists/oss-security/2021/11/25/1 Exploit, Mailing List, Third Party Advisory Added CWE NIST CWE-401 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (excluding) 5.16 *cpe:2.3:o:linux:linux_kernel:5.16:-:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Mar. 10, 2022
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html [No Types Assigned] Added Reference https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html [No Types Assigned] Added Reference https://www.debian.org/security/2022/dsa-5096 [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-4002 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-4002
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.04 }} 0.00%
score
0.07757
percentile