Detections
Analytics
Alpine: multiple dnsmasq packages: security update to 2.91-r1
high Tenable Self-Hosted Container Security Plugin ID 441829
Description
There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:- A heap-based out-of-bounds write vulnerability in the DHCPv6 implementation of dnsmasq allows local
attackers to execute arbitrary code with root privileges via a crafted DHCPv6 packet. (CVE-2026-4892)
- dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing an attacker to
inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-controlled IP
address, or to cause a DoS. (CVE-2026-2291)
- A Denial of Service (DoS) vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to
cause a denial of service via a crafted DNS packet. (CVE-2026-4890)
- A heap-based out-of-bounds read vulnerability in the DNSSEC validation of dnsmasq allows remote attackers
to cause a denial of service via a crafted DNS packet. (CVE-2026-4891)
Solution
Update the dnsmasq library and its related packages to version 2.91-r1 or later.See Also
https://security.alpinelinux.org/vuln/CVE-2026-2291
https://security.alpinelinux.org/vuln/CVE-2026-4890
https://security.alpinelinux.org/vuln/CVE-2026-4891
https://security.alpinelinux.org/vuln/CVE-2026-4892
Plugin Details
Severity: High
ID: 441829
Version: Revision 1.5
Type: Local
Published: 5/14/2026
Updated: 6/30/2026
Supported Sensors: Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security
Risk Information
VPR
Risk Factor: Medium
Score: 4.9
Percentile: 57.98
CVSS v2
Risk Factor: High
Base Score: 7.2
Temporal Score: 5.6
Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2026-4892
CVSS v3
Risk Factor: High
Base Score: 8.8
Temporal Score: 7.9
Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
Vulnerability Information
Exploit Available: true
Exploit Ease: Exploits are available
Vulnerability Publication Date: 5/11/2026
Reference Information
CVE: CVE-2026-2291, CVE-2026-4890, CVE-2026-4891, CVE-2026-4892, CVE-2026-4893, CVE-2026-5172