UBUNTU-CVE-2021-20320

Advisory lineage Upstream: 1 Downstream: 0
Upstream
CVE-2021-20320
Published: 18 Feb 2022, 18:15
Last modified:03 Jun 2026, 13:34

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
3.1 (osv_ubuntu)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

18 Feb 2022, 18:15
Published
Vulnerability first disclosed
03 Jun 2026, 13:34
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected Systems

  • ubuntu•linux

    < 4.4.0-216.249 | < 4.15.0-158.166 | < 5.4.0-86.97

  • ubuntu•linux-aws

    < 4.4.0-1098.103 | < 4.4.0-1134.148 | < 4.15.0-1114.121 | < 5.4.0-1058.61

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.11

    all

  • ubuntu•linux-aws-5.3

    all

  • ubuntu•linux-aws-5.4

    < 5.4.0-1058.61~18.04.3

  • ubuntu•linux-aws-5.8

    all

  • ubuntu•linux-aws-fips

    < 4.15.0-2055.57 | all | < 5.4.0-1069.73+fips2

  • ubuntu•linux-aws-hwe

    < 4.15.0-1113.120~16.04.1

  • ubuntu•linux-azure

    < 4.15.0-1125.138~14.04.1 | < 4.15.0-1125.138~16.04.1 | all | < 5.4.0-1062.65

  • ubuntu•linux-azure-4.15

    < 4.15.0-1125.138

  • ubuntu•linux-azure-5.11

    all

  • ubuntu•linux-azure-5.3

    all

  • ubuntu•linux-azure-5.4

    < 5.4.0-1062.65~18.04.1

  • ubuntu•linux-azure-5.8

    all

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-azure-fips

    < 4.15.0-2037.41 | all | < 5.4.0-1073.76+fips1

  • ubuntu•linux-bluefield

    < 5.4.0-1020.23 | all

  • ubuntu•linux-fips

    < 4.4.0-1068.74 | all | < 4.15.0-1071.80 | < 5.4.0-1035.41

  • ubuntu•linux-gcp

    < 4.15.0-1110.124~16.04.1 | all | < 5.4.0-1056.60

  • ubuntu•linux-gcp-4.15

    < 4.15.0-1110.124

  • ubuntu•linux-gcp-5.11

    all

  • ubuntu•linux-gcp-5.3

    all

  • ubuntu•linux-gcp-5.4

    < 5.4.0-1056.60~18.04.1

  • ubuntu•linux-gcp-5.8

    all

  • ubuntu•linux-gcp-fips

    < 4.15.0-2020.22 | all | < 5.4.0-1067.71~20.04.1

  • ubuntu•linux-gke

    < 5.4.0-1054.57

  • ubuntu•linux-gke-4.15

    all

  • ubuntu•linux-gke-5.4

    all

  • ubuntu•linux-gkeop

    < 5.4.0-1025.26

  • ubuntu•linux-gkeop-5.4

    all

  • ubuntu•linux-hwe

    < 4.15.0-158.166~16.04.1 | all

  • ubuntu•linux-hwe-5.11

    all

  • ubuntu•linux-hwe-5.4

    < 5.4.0-86.97~18.04.1

  • ubuntu•linux-hwe-5.8

    all

  • ubuntu•linux-hwe-edge

    all | all

  • ubuntu•linux-ibm

    < 5.4.0-1006.7

  • ubuntu•linux-intel-5.13

    all

  • ubuntu•linux-intel-iot-realtime

    all

  • ubuntu•linux-kvm

    < 4.4.0-1099.108 | < 4.15.0-1101.103 | < 5.4.0-1048.50

  • ubuntu•linux-lts-xenial

    < 4.4.0-218.251~14.04.1

  • ubuntu•linux-nvidia

    all

  • ubuntu•linux-oem

    all

  • ubuntu•linux-oem-5.10

    < 5.10.0-1050.52

  • ubuntu•linux-oem-5.13

    < 5.13.0-1017.21

  • ubuntu•linux-oem-5.14

    < 5.14.0-1005.5

  • ubuntu•linux-oem-5.6

    all

  • ubuntu•linux-oracle

    < 4.15.0-1082.90~16.04.1 | < 4.15.0-1082.90 | < 5.4.0-1056.60

  • ubuntu•linux-oracle-5.0

    all

  • ubuntu•linux-oracle-5.11

    all

Showing first 50 affected entries in server-rendered view.

References (2)