CVE-2021-4159
Ubuntu Security Notice USN-5790-1
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
A vulnerability was found in the Linux kernel's EBPF verifier when handling internal data structures. Internal memory locations could be returned to userspace. A local attacker with the permissions to insert eBPF code to the kernel can use this to leak internal kernel memory details defeating some of the exploit mitigations in place for the kernel.
Se encontró una vulnerabilidad en el verificador EBPF del kernel de Linux cuando son manejadas estructuras de datos internas. Las ubicaciones de memoria interna podían ser devueltas al espacio de usuario. Un atacante local con permisos para insertar código eBPF en el kernel puede usar esto para filtrar detalles de la memoria interna del kernel derrotando algunas de las mitigaciones de explotación en el lugar para el kernel.
It was discovered that the BPF verifier in the Linux kernel did not properly handle internal data structures. A local attacker could use this to expose sensitive information. It was discovered that a race condition existed in the Android Binder IPC subsystem in the Linux kernel, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2021-12-23 CVE Reserved
- 2022-08-24 CVE Published
- 2024-08-03 CVE Updated
- 2025-03-30 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-202: Exposure of Sensitive Information Through Data Queries
CAPEC
References (5)
URL | Tag | Source |
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https://access.redhat.com/security/cve/CVE-2021-4159 | Third Party Advisory | |
https://bugzilla.redhat.com/show_bug.cgi?id=2036024 | Issue Tracking | |
https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html | Mailing List |
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https://security-tracker.debian.org/tracker/CVE-2021-4159 | Third Party Advisory |
URL | Date | SRC |
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URL | Date | SRC |
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https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=294f2fc6da27620a506e6c050241655459ccd6bd | 2022-10-06 |
URL | Date | SRC |
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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" | < 5.7 Search vendor "Linux" for product "Linux Kernel" and version " < 5.7" | - |
Affected
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Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0" | - |
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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