UBUNTU-CVE-2022-43945

Advisory lineage Upstream: 1 Downstream: 19
Upstream
CVE-2022-43945
Published: 04 Nov 2022, 19:15
Last modified:03 Jun 2026, 13:35

Vulnerability Summary

Overall Risk (default)
medium
30/100
CVSS Score
7.5 HIGH
3.1 (osv_ubuntu)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

04 Nov 2022, 19:15
Published
Vulnerability first disclosed
03 Jun 2026, 13:35
Last Modified
Vulnerability information updated

Description

The Linux kernel NFSD implementation prior to versions 5.19.17 and 6.0.2 are vulnerable to buffer overflow. NFSD tracks the number of pages held by each NFSD thread by combining the receive and send buffers of a remote procedure call (RPC) into a single array of pages. A client can force the send buffer to shrink by sending an RPC message over TCP with garbage data added at the end of the message. The RPC message with garbage data is still correctly formed according to the specification and is passed forward to handlers. Vulnerable code in NFSD is not expecting the oversized request and writes beyond the allocated buffer space. CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Systems

  • ubuntu•linux

    all | < 4.4.0-236.270 | < 4.15.0-202.213 | < 5.4.0-137.154 | < 5.15.0-56.62

  • ubuntu•linux-aws

    < 4.4.0-1115.121 | < 4.4.0-1153.168 | < 4.15.0-1148.160 | < 5.4.0-1094.102 | < 5.15.0-1026.30

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.11

    all

  • ubuntu•linux-aws-5.13

    all

  • ubuntu•linux-aws-5.15

    < 5.15.0-1026.30~20.04.2

  • ubuntu•linux-aws-5.3

    all

  • ubuntu•linux-aws-5.4

    < 5.4.0-1094.102~18.04.1

  • ubuntu•linux-aws-5.8

    all

  • ubuntu•linux-aws-6.2

    all

  • ubuntu•linux-aws-fips

    < 4.15.0-2087.93 | all | < 5.4.0-1094.102+fips1

  • ubuntu•linux-aws-hwe

    < 4.15.0-1148.160~16.04.1

  • ubuntu•linux-azure

    < 4.15.0-1159.174~14.04.1 | < 4.15.0-1159.174~16.04.1 | all | < 5.4.0-1101.107 | < 5.15.0-1029.36

  • ubuntu•linux-azure-4.15

    < 4.15.0-1159.174

  • ubuntu•linux-azure-5.11

    all

  • ubuntu•linux-azure-5.13

    all

  • ubuntu•linux-azure-5.15

    < 5.15.0-1029.36~20.04.1

  • ubuntu•linux-azure-5.3

    all

  • ubuntu•linux-azure-5.4

    < 5.4.0-1101.107~18.04.1

  • ubuntu•linux-azure-5.8

    all

  • ubuntu•linux-azure-6.2

    all

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-azure-fde

    < 5.15.0-1029.36.1

  • ubuntu•linux-azure-fde-6.2

    all

  • ubuntu•linux-azure-fips

    < 4.15.0-2068.74 | all | < 5.4.0-1101.107+fips1

  • ubuntu•linux-bluefield

    < 5.4.0-1058.64 | all

  • ubuntu•linux-dell300x

    < 4.15.0-1060.65

  • ubuntu•linux-fips

    < 4.4.0-1085.92 | all | < 4.15.0-1105.116 | < 5.4.0-1070.79

  • ubuntu•linux-gcp

    < 4.15.0-1143.159~16.04.1 | all | < 5.4.0-1098.107 | < 5.15.0-1025.32

  • ubuntu•linux-gcp-4.15

    < 4.15.0-1143.159

  • ubuntu•linux-gcp-5.11

    all

  • ubuntu•linux-gcp-5.13

    all

  • ubuntu•linux-gcp-5.15

    < 5.15.0-1025.32~20.04.2

  • ubuntu•linux-gcp-5.3

    all

  • ubuntu•linux-gcp-5.4

    < 5.4.0-1098.107~18.04.1

  • ubuntu•linux-gcp-5.8

    all

  • ubuntu•linux-gcp-6.2

    all

  • ubuntu•linux-gcp-fips

    < 4.15.0-2052.57 | all | < 5.4.0-1098.107+fips1

  • ubuntu•linux-gke

    < 5.4.0-1094.101 | < 5.15.0-1023.28

  • ubuntu•linux-gke-4.15

    all

  • ubuntu•linux-gke-5.15

    < 5.15.0-1023.28~20.04.2

  • ubuntu•linux-gke-5.4

    all

  • ubuntu•linux-gkeop

    < 5.4.0-1062.66 | < 5.15.0-1011.15

  • ubuntu•linux-gkeop-5.15

    < 5.15.0-1011.15~20.04.2

  • ubuntu•linux-gkeop-5.4

    all

  • ubuntu•linux-hwe

    < 4.15.0-202.213~16.04.1 | all

  • ubuntu•linux-hwe-5.11

    all

  • ubuntu•linux-hwe-5.13

    all

  • ubuntu•linux-hwe-5.15

    < 5.15.0-56.62~20.04.1

  • ubuntu•linux-hwe-5.4

    < 5.4.0-137.154~18.04.1

Showing first 50 affected entries in server-rendered view.

References (23)