CVE-2021-4002
kernel: possible leak or coruption of data residing on hugetlbfs
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
1Exploited in Wild
-Decision
Descriptions
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.
Se encontró un fallo de pérdida de memoria en el uso de memoria hugetlbfs del kernel de Linux en la forma en que el usuario mapea algunas regiones de memoria dos veces usando shmget() que están alineadas a la alineación PUD con el fallo de algunas de las páginas de memoria. Un usuario local podría usar este fallo para conseguir acceso no autorizado a algunos datos
Red Hat Advanced Cluster Management for Kubernetes 2.5.0 images Red Hat Advanced Cluster Management for Kubernetes provides the capabilities to address common challenges that administrators and site reliability engineers face as they work across a range of public and private cloud environments. Clusters and applications are all visible and managed from a single console—with security policy built in. This advisory contains the container images for Red Hat Advanced Cluster Management for Kubernetes, which fix several bugs and security issues. Issues addressed include privilege escalation and traversal vulnerabilities.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2021-11-22 CVE Reserved
- 2022-01-06 CVE Published
- 2024-08-03 CVE Updated
- 2024-08-03 First Exploit
- 2025-06-15 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-401: Missing Release of Memory after Effective Lifetime
- CWE-459: Incomplete Cleanup
CAPEC
References (9)
| URL | Tag | Source |
|---|---|---|
| https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html | Mailing List |
|
| https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html | Mailing List |
|
| URL | Date | SRC |
|---|---|---|
| https://www.openwall.com/lists/oss-security/2021/11/25/1 | 2024-08-03 |
| URL | Date | SRC |
|---|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=2025726 | 2022-05-10 | |
| https://www.debian.org/security/2022/dsa-5096 | 2023-02-22 | |
| https://access.redhat.com/security/cve/CVE-2021-4002 | 2022-05-10 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | < 5.16 Search vendor "Linux" for product "Linux Kernel" and version " < 5.16" | - |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 5.16 Search vendor "Linux" for product "Linux Kernel" and version "5.16" | - |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 5.16 Search vendor "Linux" for product "Linux Kernel" and version "5.16" | rc1 |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 5.16 Search vendor "Linux" for product "Linux Kernel" and version "5.16" | rc2 |
Affected
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| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0" | - |
Affected
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| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0" | - |
Affected
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| Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | 35 Search vendor "Fedoraproject" for product "Fedora" and version "35" | - |
Affected
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| Oracle Search vendor "Oracle" | Communications Cloud Native Core Binding Support Function Search vendor "Oracle" for product "Communications Cloud Native Core Binding Support Function" | 22.1.3 Search vendor "Oracle" for product "Communications Cloud Native Core Binding Support Function" and version "22.1.3" | - |
Affected
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| Oracle Search vendor "Oracle" | Communications Cloud Native Core Network Exposure Function Search vendor "Oracle" for product "Communications Cloud Native Core Network Exposure Function" | 22.1.1 Search vendor "Oracle" for product "Communications Cloud Native Core Network Exposure Function" and version "22.1.1" | - |
Affected
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| Oracle Search vendor "Oracle" | Communications Cloud Native Core Policy Search vendor "Oracle" for product "Communications Cloud Native Core Policy" | 22.2.0 Search vendor "Oracle" for product "Communications Cloud Native Core Policy" and version "22.2.0" | - |
Affected
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