CVE-2021-20320

2022-02-1800:00:00

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

0.0004 Low

EPSS

Percentile

5.3%

JSON

A flaw was found in s390 eBPF JIT in bpf_jit_insn in
arch/s390/net/bpf_jit_comp.c in the Linux kernel. In this flaw, a local
attacker with special user privilege can circumvent the verifier and may
lead to a confidentiality problem.

Bugs

<https://bugzilla.redhat.com/show_bug.cgi?id=2010090>

OSVersionArchitecturePackageVersionFilename
ubuntu20.04noarchlinux< 5.4.0-86.97UNKNOWN
ubuntu16.04noarchlinux< 4.4.0-216.249) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu18.04noarchlinux< anyUNKNOWN
ubuntu14.04noarchlinux-aws< 4.4.0-1098.103) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu16.04noarchlinux-aws< 4.4.0-1134.148) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu18.04noarchlinux-aws< anyUNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1058.61UNKNOWN
ubuntu18.04noarchlinux-aws-5.4< anyUNKNOWN
ubuntu16.04noarchlinux-aws-hwe< 4.15.0-1113.120~16.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu20.04noarchlinux-azure< 5.4.0-1062.65UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	20.04	noarch	linux	< 5.4.0-86.97	UNKNOWN
ubuntu	16.04	noarch	linux	< 4.4.0-216.249) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	18.04	noarch	linux	< any	UNKNOWN
ubuntu	14.04	noarch	linux-aws	< 4.4.0-1098.103) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	16.04	noarch	linux-aws	< 4.4.0-1134.148) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	18.04	noarch	linux-aws	< any	UNKNOWN
ubuntu	20.04	noarch	linux-aws	< 5.4.0-1058.61	UNKNOWN
ubuntu	18.04	noarch	linux-aws-5.4	< any	UNKNOWN
ubuntu	16.04	noarch	linux-aws-hwe	< 4.15.0-1113.120~16.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	20.04	noarch	linux-azure	< 5.4.0-1062.65	UNKNOWN