CVE-2021-4159

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.

CVSS v3.0 4.4 MEDIUM

4.4^/10

CVSS v3.0 : MEDIUM

Vector :

Exploitability : 0.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2021-4159	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2036024	Issue Tracking
https://security-tracker.debian.org/tracker/CVE-2021-4159	Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=294f2fc6da27620a506e6c050241655459ccd6bd	Mailing List Patch Vendor Advisory
https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html	Mailing List Third Party Advisory

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Configurations

Configuration 1 (hide)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*

Configuration 3 (hide)

cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

Information

Published : 2022-08-24 09:15

Updated : 2022-10-06 08:30

NVD link : CVE-2021-4159

Mitre link : CVE-2021-4159

JSON object : View

CWE

NVD-CWE-Other

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Products Affected

redhat

enterprise_linux

debian

debian_linux

linux

linux_kernel

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