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01 Record

CVE-2022-2928

An option refcount overflow exists in dhcpd

MediumPUBLISHEDCNA: isc
CNA base score6.5 CVSS v3.xCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
View raw JSON

02 Description

An option refcount overflow exists in dhcpd

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
0.71% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 53.0% of scored records. A rank, not a probability.
NVD base score
6.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2022-10-07 04:45Z4 YR AGO
Last updated
2024-09-17 00:21Z2 YR AGO
Reserved
2022-08-22
Assigning CNA
isc
Record state
PUBLISHED
Severity
Medium (CVSS 6.5)
CNA CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
  • CWE-476NULL Pointer DereferenceBase
  • CWE-190Integer Overflow or WraparoundBase
Data version
5.1
Document digest
8129be051e352429c84db8e228796a8bae1ca3e6855ac59fb8e97a2983a5b5b9

05 Affected products

VendorProductVersionsPlatforms
ISCISC DHCP4.4.0 through versions before 4.4.3-P1, 4.1 ESV 4.1-ESV-R1 through versions before 4.1-ESV-R16-P1—

06 References

07 Remediation

Upgrade to the patched release most closely related to your current version of ISC DHCP. These can all be downloaded from https://www.isc.org/downloads. 4.4.3-P1 4.1-ESV-R16-P2

08 Fixed in

AlmaLinux 8

  • dhcp-client
    Fixed in 12:4.3.6-49.el8
  • dhcp-common
    Fixed in 12:4.3.6-49.el8
  • dhcp-libs
    Fixed in 12:4.3.6-49.el8
  • dhcp-relay
    Fixed in 12:4.3.6-49.el8
  • dhcp-server
    Fixed in 12:4.3.6-49.el8

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

AlmaLinux 9

  • dhcp-client
    Fixed in 12:4.4.2-18.b1.el9
  • dhcp-common
    Fixed in 12:4.4.2-18.b1.el9
  • dhcp-relay
    Fixed in 12:4.4.2-18.b1.el9
  • dhcp-server
    Fixed in 12:4.4.2-18.b1.el9

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 8

  • dhcp-client
    Fixed in 12:4.3.6-49.el8
  • dhcp-common
    Fixed in 12:4.3.6-49.el8
  • dhcp-libs
    Fixed in 12:4.3.6-49.el8
  • dhcp-relay
    Fixed in 12:4.3.6-49.el8
  • dhcp-server
    Fixed in 12:4.3.6-49.el8

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 9

  • dhcp-client
    Fixed in 12:4.4.2-18.b1.el9
  • dhcp-common
    Fixed in 12:4.4.2-18.b1.el9
  • dhcp-relay
    Fixed in 12:4.4.2-18.b1.el9
  • dhcp-server
    Fixed in 12:4.4.2-18.b1.el9

Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • isc-dhcp
    Fixed in 4.4.3-2.1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • isc-dhcp
    Fixed in 4.4.3-2.1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 18.04 LTS

  • isc-dhcp
    Fixed in 4.3.5-3ubuntu7.4

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 20.04 LTS

  • isc-dhcp
    Fixed in 4.4.1-2.1ubuntu5.20.04.4

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 22.04 LTS

  • isc-dhcp
    Fixed in 4.4.1-2.3ubuntu2.3

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 14.04 LTS

  • isc-dhcp
    Fixed in 4.2.4-7ubuntu12.13+esm2
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 16.04 LTS

  • isc-dhcp
    Fixed in 4.3.3-5ubuntu12.10+esm2
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.