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
| Vendor | Product | Versions |
|---|---|---|
| Alpine:v3.21 | avahi | 0, 0, 0 |
| Alpine:v3.19 | avahi | 0, 0, 0 |
| Alpine:v3.24 | avahi | 0 |
| Alpine:v3.20 | avahi | 0, 0, 0 |
| Alpine:v3.13 | avahi | 0, 0, 0 |
| Alpine:v3.16 | avahi | 0, 0, 0 |
| Alpine:v3.14 | avahi | 0, 0, 0 |
| Alpine:v3.18 | avahi | 0, 0, 0 |
| Alpine:v3.17 | avahi | 0, 0, 0 |
| Alpine:v3.23 | avahi | 0, 0, 0 |
| Alpine:v3.12 | avahi | 0, 0, 0 |
| Alpine:v3.15 | avahi | 0, 0, 0 |
| Alpine:v3.11 | avahi | 0, 0, 0 |
| Alpine:v3.10 | avahi | 0, 0, 0 |
| Alpine:v3.22 | avahi | 0, 0, 0 |
Timeline
- Feb 17, 2021 CVE Published
- Apr 30, 2026 Distribution Patch
- Jun 15, 2026 CVE Updated