CVE-2021-35477

2021-08-0200:00:00

ubuntu.com

5.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

2.1 Low

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:L/AC:L/Au:N/C:P/I:N/A:N

0.0005 Low

EPSS

Percentile

14.6%

JSON

In the Linux kernel through 5.13.7, an unprivileged BPF program can obtain
sensitive information from kernel memory via a Speculative Store Bypass
side-channel attack because a certain preempting store operation does not
necessarily occur before a store operation that has an attacker-controlled
value.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlinux< anyUNKNOWN
ubuntu20.04noarchlinux< 5.4.0-90.101UNKNOWN
ubuntu21.04noarchlinux< 5.11.0-37.41UNKNOWN
ubuntu18.04noarchlinux-aws< anyUNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1059.62UNKNOWN
ubuntu21.04noarchlinux-aws< 5.11.0-1019.20UNKNOWN
ubuntu20.04noarchlinux-aws-5.11< 5.11.0-1019.20~20.04.1UNKNOWN
ubuntu18.04noarchlinux-aws-5.4< 5.4.0-1059.62~18.04.1UNKNOWN
ubuntu20.04noarchlinux-azure< 5.4.0-1063.66UNKNOWN
ubuntu21.04noarchlinux-azure< 5.11.0-1017.18UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	linux	< any	UNKNOWN
ubuntu	20.04	noarch	linux	< 5.4.0-90.101	UNKNOWN
ubuntu	21.04	noarch	linux	< 5.11.0-37.41	UNKNOWN
ubuntu	18.04	noarch	linux-aws	< any	UNKNOWN
ubuntu	20.04	noarch	linux-aws	< 5.4.0-1059.62	UNKNOWN
ubuntu	21.04	noarch	linux-aws	< 5.11.0-1019.20	UNKNOWN
ubuntu	20.04	noarch	linux-aws-5.11	< 5.11.0-1019.20~20.04.1	UNKNOWN
ubuntu	18.04	noarch	linux-aws-5.4	< 5.4.0-1059.62~18.04.1	UNKNOWN
ubuntu	20.04	noarch	linux-azure	< 5.4.0-1063.66	UNKNOWN
ubuntu	21.04	noarch	linux-azure	< 5.11.0-1017.18	UNKNOWN