CVE-2020-37127
Publication date 9 February 2026
Last updated 9 February 2026
Ubuntu priority
Description
Dnsmasq-utils 2.79-1 contains a buffer overflow vulnerability in the dhcp_release utility that allows attackers to cause a denial of service by supplying excessive input. Attackers can trigger a core dump and terminate the dhcp_release process by sending a crafted input string longer than 16 characters.
Read the notes from the security team
Why is this CVE low priority?
Denial of service in command line tool
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| dnsmasq | 25.10 questing |
Not affected
|
| 24.04 LTS noble |
Not affected
|
|
| 22.04 LTS jammy |
Fixed 2.90-0ubuntu0.22.04.1
|
|
| 20.04 LTS focal |
Fixed 2.90-0ubuntu0.20.04.1
|
|
| 18.04 LTS bionic |
Needs evaluation
|
|
| 16.04 LTS xenial |
Needs evaluation
|
|
| 14.04 LTS trusty |
Needs evaluation
|
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mdeslaur
this is only a DoS in a command line tool, this is unlikely to have any security impact. Marking as low.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
5.5 · Medium
|
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | Required |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |