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nvd[email protected]NVD:CVE-2021-4159
HistoryAug 24, 2022 - 4:15 p.m.

CVE-2021-4159

2022-08-2416:15:09
CWE-202
web.nvd.nist.gov
7
vulnerability
linux kernel
ebpf verifier
local attacker
memory leak
exploit mitigation

CVSS3

4.4

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

EPSS

0

Percentile

5.1%

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.

Affected configurations

Nvd
Node
linuxlinux_kernelRange<5.7
Node
redhatenterprise_linuxMatch8.0
Node
debiandebian_linuxMatch10.0

CVSS3

4.4

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

EPSS

0

Percentile

5.1%