CVE-2021-3923

Aliases:UBUNTU-CVE-2021-3923DEBIAN-CVE-2021-3923
Advisory lineage Upstream: 0 Downstream: 12
Modified
Published: 27 Mar 2023, 00:00
Last modified:24 Feb 2025, 19:19

Vulnerability Summary

Overall Risk (default)
minimal
9/100
CVSS Score
2.3 LOW
v3.1 (cve.org)
EPSS Score
0.2% LOW
0% probability +0.18%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

27 Mar 2023, 00:00
Published
Vulnerability first disclosed
24 Feb 2025, 19:19
Last Modified
Vulnerability information updated

Description

A flaw was found in the Linux kernel's implementation of RDMA over infiniband. An attacker with a privileged local account can leak kernel stack information when issuing commands to the /dev/infiniband/rdma_cm device node. While this access is unlikely to leak sensitive user information, it can be further used to defeat existing kernel protection mechanisms.

CVSS Metrics

  • v3.1•LOW•Score: 2.3CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N

EPSS Trends

Current EPSS score: 0.20%• Percentile: 10%

Techniques & Countermeasures

  • CWE-200•Exposure of Sensitive Information to an Unauthorized Actor

    The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

Affected Systems

  • debian•linux

    < 5.10.92-1 | < 5.15.15-1 | < 5.15.15-1 | < 5.15.15-1

  • ubuntu•linux

    < 4.15.0-173.182 | < 5.4.0-105.119

  • ubuntu•linux-aws

    < 4.15.0-1124.133 | < 5.4.0-1069.73

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.11

    all

  • ubuntu•linux-aws-5.13

    all

  • ubuntu•linux-aws-5.3

    all

  • ubuntu•linux-aws-5.4

    < 5.4.0-1069.73~18.04.1

  • ubuntu•linux-aws-5.8

    all

  • ubuntu•linux-aws-fips

    < 4.15.0-2064.67 | all | < 5.4.0-1069.73+fips2

  • ubuntu•linux-aws-hwe

    < 4.15.0-1124.133~16.04.1

  • ubuntu•linux-azure

    < 4.15.0-1134.147~14.04.1 | < 4.15.0-1134.147~16.04.1 | all | < 5.4.0-1073.76

  • ubuntu•linux-azure-4.15

    < 4.15.0-1134.147

  • ubuntu•linux-azure-5.11

    all

  • ubuntu•linux-azure-5.13

    all

  • ubuntu•linux-azure-5.3

    all

  • ubuntu•linux-azure-5.4

    < 5.4.0-1073.76~18.04.1

  • ubuntu•linux-azure-5.8

    all

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-azure-fips

    < 4.15.0-2046.50 | all | < 5.4.0-1073.76+fips1

  • ubuntu•linux-bluefield

    all | < 5.4.0-1032.35

  • ubuntu•linux-dell300x

    < 4.15.0-1038.43

  • ubuntu•linux-fips

    < 4.15.0-1081.90 | all | < 5.4.0-1046.52

  • ubuntu•linux-gcp

    < 4.15.0-1119.133~16.04.1 | all | < 5.4.0-1068.72

  • ubuntu•linux-gcp-4.15

    < 4.15.0-1119.133

  • ubuntu•linux-gcp-5.11

    all

  • ubuntu•linux-gcp-5.13

    all

  • ubuntu•linux-gcp-5.3

    all

  • ubuntu•linux-gcp-5.4

    < 5.4.0-1068.72~18.04.1

  • ubuntu•linux-gcp-5.8

    all

  • ubuntu•linux-gcp-fips

    < 4.15.0-2029.32 | all | < 5.4.0-1067.71~20.04.1

  • ubuntu•linux-gke

    < 5.4.0-1066.69

  • ubuntu•linux-gke-4.15

    all

  • ubuntu•linux-gke-5.4

    all

  • ubuntu•linux-gkeop

    < 5.4.0-1037.38

  • ubuntu•linux-gkeop-5.4

    all

  • ubuntu•linux-hwe

    < 4.15.0-173.182~16.04.1 | all

  • ubuntu•linux-hwe-5.11

    all

  • ubuntu•linux-hwe-5.13

    all

  • ubuntu•linux-hwe-5.4

    < 5.4.0-105.119~18.04.1

  • ubuntu•linux-hwe-5.8

    all

  • ubuntu•linux-hwe-edge

    all | all

  • ubuntu•linux-ibm

    < 5.4.0-1018.20

  • ubuntu•linux-ibm-5.4

    < 5.4.0-1018.20~18.04.1

  • ubuntu•linux-intel-5.13

    all

  • ubuntu•linux-intel-iot-realtime

    all

  • ubuntu•linux-kvm

    < 4.15.0-1110.113 | < 5.4.0-1059.62

  • ubuntu•linux-oem

    all

  • ubuntu•linux-oem-5.10

    all

  • ubuntu•linux-oem-5.13

    all

Showing first 50 affected entries in server-rendered view.

References (6)