Is CVE-2022-2928 in the CISA KEV catalog?

No. CVE-2022-2928 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-2928?

CVE-2022-2928 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2022-2928?

CVE-2022-2928 has an EPSS score of 0.66% (47th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-2928?

Upgrade isc-dhcp on debian 11 to 4.4.1-2.3+deb11u1 or later. Fixes are available for 28 affected products.

CVE & CISA-KEV Catalog

CVE-2022-2928

MEDIUM

6.5

CVSS v3

NVD

Description

In ISC DHCP 4.4.0 -> 4.4.3, ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16-P1, when the function option_code_hash_lookup() is called from add_option(), it increases the option's refcount field. However, there is not a corresponding call to option_dereference() to decrement the refcount field. The function add_option() is only used in server responses to lease query packets. Each lease query response calls this function for several options, so eventually, the reference counters could overflow and cause the server to abort.

CWE-476NULL Pointer Dereference

How to fix

Remediation Available

isc-dhcpDebian

Fixed in:4.4.1-2.3+deb11u1CVE-2022-2928

Fixed in:4.4.3-2.1CVE-2022-2928

dhcpRed Hat / RHEL

Fixed in:12:4.3.6-49.el8RHSA-2023:3000

Fixed in:12:4.4.2-18.b1.el9RHSA-2023:2502

dhcpRocky

Fixed in:12:4.3.6-49.el8RHSA-2023:3000

Fixed in:12:4.4.2-18.b1.el9RHSA-2023:2502

dhcp-clientRed Hat / RHEL

Fixed in:12:4.3.6-49.el8RHSA-2023:3000

Fixed in:12:4.4.2-18.b1.el9RHSA-2023:2502

dhcp-clientRocky

Fixed in:12:4.3.6-49.el8RHSA-2023:3000

Fixed in:12:4.4.2-18.b1.el9RHSA-2023:2502

dhcp-client-debuginfoRocky

Fixed in:12:4.3.6-49.el8RHSA-2023:3000

Fixed in:12:4.4.2-18.b1.el9RHSA-2023:2502

dhcp-client-debuginfoRed Hat / RHEL

Fixed in:12:4.3.6-49.el8RHSA-2023:3000

Fixed in:12:4.4.2-18.b1.el9RHSA-2023:2502

dhcp-commonRed Hat / RHEL

Fixed in:12:4.3.6-49.el8RHSA-2023:3000

Fixed in:12:4.4.2-18.b1.el9RHSA-2023:2502

dhcp-commonRocky

Fixed in:12:4.3.6-49.el8RHSA-2023:3000

Fixed in:12:4.4.2-18.b1.el9RHSA-2023:2502

dhcp-debuginfoRed Hat / RHEL

Fixed in:12:4.3.6-49.el8RHSA-2023:3000

Fixed in:12:4.4.2-18.b1.el9RHSA-2023:2502

dhcp-debuginfoRocky

Fixed in:12:4.3.6-49.el8RHSA-2023:3000

Fixed in:12:4.4.2-18.b1.el9RHSA-2023:2502

dhcp-debugsourceRocky

Fixed in:12:4.3.6-49.el8RHSA-2023:3000

Fixed in:12:4.4.2-18.b1.el9RHSA-2023:2502

dhcp-debugsourceRed Hat / RHEL

Fixed in:12:4.3.6-49.el8RHSA-2023:3000

Fixed in:12:4.4.2-18.b1.el9RHSA-2023:2502

dhcp-libsRed Hat / RHEL

Fixed in:12:4.3.6-49.el8RHSA-2023:3000

dhcp-libsRocky

Fixed in:12:4.3.6-49.el8RHSA-2023:3000

dhcp-libs-debuginfoRocky

Fixed in:12:4.3.6-49.el8RHSA-2023:3000

dhcp-libs-debuginfoRed Hat / RHEL

Fixed in:12:4.3.6-49.el8RHSA-2023:3000

dhcp-relayRocky

Fixed in:12:4.3.6-49.el8RHSA-2023:3000

Fixed in:12:4.4.2-18.b1.el9RHSA-2023:2502

dhcp-relayRed Hat / RHEL

Fixed in:12:4.3.6-49.el8RHSA-2023:3000

Fixed in:12:4.4.2-18.b1.el9RHSA-2023:2502

dhcp-relay-debuginfoRocky

Fixed in:12:4.3.6-49.el8RHSA-2023:3000

Fixed in:12:4.4.2-18.b1.el9RHSA-2023:2502

dhcp-relay-debuginfoRed Hat / RHEL

Fixed in:12:4.3.6-49.el8RHSA-2023:3000

Fixed in:12:4.4.2-18.b1.el9RHSA-2023:2502

dhcp-serverRed Hat / RHEL

Fixed in:12:4.3.6-49.el8RHSA-2023:3000

Fixed in:12:4.4.2-18.b1.el9RHSA-2023:2502

dhcp-serverRocky

Fixed in:12:4.3.6-49.el8RHSA-2023:3000

Fixed in:12:4.4.2-18.b1.el9RHSA-2023:2502

dhcp-server-debuginfoRocky

Fixed in:12:4.3.6-49.el8RHSA-2023:3000

Fixed in:12:4.4.2-18.b1.el9RHSA-2023:2502

dhcp-server-debuginfoRed Hat / RHEL

Fixed in:12:4.3.6-49.el8RHSA-2023:3000

Fixed in:12:4.4.2-18.b1.el9RHSA-2023:2502

isc-dhcpUbuntu

Fixed in:4.2.4-7ubuntu12.13+esm2USN-5658-3

Fixed in:4.3.3-5ubuntu12.10+esm2USN-5658-2

Fixed in:4.3.5-3ubuntu7.4USN-5658-1

Fixed in:4.4.1-2.1ubuntu5.20.04.4USN-5658-1

Fixed in:4.4.1-2.3ubuntu2.3USN-5658-1

isc-dhcp-clientUbuntu

Fixed in:4.2.4-7ubuntu12.13+esm2USN-5658-3

Fixed in:4.3.3-5ubuntu12.10+esm2USN-5658-2

Fixed in:4.3.5-3ubuntu7.4USN-5658-1

Fixed in:4.4.1-2.1ubuntu5.20.04.4USN-5658-1

Fixed in:4.4.1-2.3ubuntu2.3USN-5658-1

isc-dhcp-serverUbuntu

Fixed in:4.2.4-7ubuntu12.13+esm2USN-5658-3

Fixed in:4.3.3-5ubuntu12.10+esm2USN-5658-2

Fixed in:4.3.5-3ubuntu7.4USN-5658-1

Fixed in:4.4.1-2.1ubuntu5.20.04.4USN-5658-1

Fixed in:4.4.1-2.3ubuntu2.3USN-5658-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorAdjacent

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

0.66%probability of exploitation in 30 days

47thpercentile

Moderate risk: more likely to be exploited than 47% of all known CVEs.

References

Vendor Advisory1

kb.isc.org

Third-Party Advisory1

lists.debian.org

Other references4

Related Vulnerabilities

Other CWE-476 (NULL Pointer Dereference) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-21758	High	7.5	92%	-	Fix
CVE-2023-21547	High	7.5	88%	-	Fix
CVE-2014-3470	Medium	4.3	86%	-	Fix
CVE-2021-44224	High	8.2	82%	-	Fix
CVE-2016-0742	High	7.5	82%	-	Fix
CVE-2009-1386	Medium	5.0	80%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.