CVE-2021-21781
kernel: arm: SIGPAGE information disclosure vulnerability
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
1Exploited in Wild
-Decision
Descriptions
An information disclosure vulnerability exists in the ARM SIGPAGE functionality of Linux Kernel v5.4.66 and v5.4.54. The latest version (5.11-rc4) seems to still be vulnerable. A userland application can read the contents of the sigpage, which can leak kernel memory contents. An attacker can read a process’s memory at a specific offset to trigger this vulnerability. This was fixed in kernel releases: 4.14.222 4.19.177 5.4.99 5.10.17 5.11
Se presenta una vulnerabilidad de divulgación de información en la funcionalidad ARM SIGPAGE del Kernel de Linux versiones v5.4.66 y v5.4.54. La última versión (5.11-rc4) parece seguir siendo vulnerable. Una aplicación de userland puede leer el contenido de la sigpage, que puede filtrar el contenido de la memoria del kernel. Un atacante puede leer la memoria de un proceso en un desplazamiento específico para desencadenar esta vulnerabilidad. Esto fue corregido en las versiones del kernel: 4.14.222 4.19.177 5.4.99 5.10.17 5.11
An information disclosure flaw exists in the ARM SIGPAGE functionality of the Linux kernel. An attacker with a local account can read the contents of the sigpage, which contains previously initialized kernel memory contents. This flaw requires an attacker to read a process’s memory at a specific offset to trigger this vulnerability.
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
- 2021-01-04 CVE Reserved
- 2021-08-10 CVE Published
- 2024-08-03 CVE Updated
- 2024-08-03 First Exploit
- 2025-07-03 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-908: Use of Uninitialized Resource
CAPEC
References (4)
URL | Tag | Source |
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URL | Date | SRC |
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https://talosintelligence.com/vulnerability_reports/TALOS-2021-1243 | 2024-08-03 |
URL | Date | SRC |
---|---|---|
https://www.oracle.com/security-alerts/cpujul2022.html | 2023-02-03 |
URL | Date | SRC |
---|---|---|
https://access.redhat.com/security/cve/CVE-2021-21781 | 2022-05-10 | |
https://bugzilla.redhat.com/show_bug.cgi?id=1981950 | 2022-05-10 |
Affected Vendors, Products, and Versions
Vendor | Product | Version | Other | Status | ||||||
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Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 5.4.54 Search vendor "Linux" for product "Linux Kernel" and version "5.4.54" | - |
Affected
| ||||||
Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 5.4.66 Search vendor "Linux" for product "Linux Kernel" and version "5.4.66" | - |
Affected
| ||||||
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
| ||||||
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
| ||||||
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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