CVEvulnerability

CVE-2022-2928

6.5 MEDIUM Published 2022-10-07 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2022-10-07
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
6.5 MEDIUM — CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1 ([email protected])
6.5 MEDIUM — CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-476

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.

Affected configurations

• isc dhcp (>= 4.4.0 <= 4.4.3) • isc dhcp 4.1-esv • debian debian linux 10.0 • fedoraproject fedora 35 • fedoraproject fedora 36 • fedoraproject fedora 37

Related

Weakness · CWE (1)

  • CWE-476 NULL Pointer Dereference weakness

References