Skip to content
CVE PROGRAM SOURCE RECORD7.4 High

CVE-2026-3593

Heap use-after-free vulnerability in BIND 9 DNS-over-HTTPS implementation

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
isc

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

ISC BIND 9

Default version status: unaffected

  • 9.20.0 to ≤ 9.20.22affected
  • 9.21.0 to ≤ 9.21.21affected
  • 9.20.9-S1 to ≤ 9.20.22-S1affected
  • 9.18.0 to ≤ 9.18.48unaffected
  • 9.18.11-S1 to ≤ 9.18.48-S1unaffected

References