HIGHCVE-2026-3593Published Modified CNA isc
CVE-2026-3593: Heap use-after-free vulnerability in BIND 9 DNS-over-HTTPS implementation
A use-after-free vulnerability exists within the DNS-over-HTTPS implementation. This issue affects BIND 9 versions 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, and 9.20.9-S1 through 9.20.22-S1. BIND 9 versions 9.18.0 through 9.18.48 and 9.18.11-S1 through 9.18.48-S1 are NOT affected.
Metrics
- CVSS v3.1
- 7.4
- Severity
- HIGH
- Fixed in
- 9.18.0
- Affected Products
- 1
Affected packages
- ISC / BIND 9≤ 9.20.22 · ≤ 9.21.21 · ≤ 9.20.22-S1Fixed in 9.18.0, 9.18.11-S1
CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H