VDB

ALPINE-CVE-2021-26720

ALPINE-CVE-2021-26720 PUBLISHED CVSS 7.800000190734863 HIGH

avahi-daemon-check-dns.sh in the Debian avahi package through 0.8-4 is executed as root via /etc/network/if-up.d/avahi-daemon, and allows a local attacker to cause a denial of service or create arbitrary empty files via a symlink attack on files under /run/avahi-daemon. NOTE: this only affects the packaging for Debian GNU/Linux (used indirectly by SUSE), not the upstream Avahi product.

Risk Scores

CVSS 3.1
7.800000190734863
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Products

VendorProductVersions
Alpine:v3.21avahi0, 0, 0
Alpine:v3.19avahi0, 0, 0
Alpine:v3.24avahi0
Alpine:v3.20avahi0, 0, 0
Alpine:v3.13avahi0, 0, 0
Alpine:v3.16avahi0, 0, 0
Alpine:v3.14avahi0, 0, 0
Alpine:v3.18avahi0, 0, 0
Alpine:v3.17avahi0, 0, 0
Alpine:v3.23avahi0, 0, 0
Alpine:v3.12avahi0, 0, 0
Alpine:v3.15avahi0, 0, 0
Alpine:v3.11avahi0, 0, 0
Alpine:v3.10avahi0, 0, 0
Alpine:v3.22avahi0, 0, 0

Timeline

  • Feb 17, 2021 CVE Published
  • Apr 30, 2026 Distribution Patch
  • Jun 15, 2026 CVE Updated
Open in Interactive Console →
$ Console Community · 100/wk Open console ›