Skip to content
CVE PROGRAM SOURCE RECORD7.5 High

CVE-2026-19667

Remote assertion failure via 16-bit length truncation in `dns_ncache_add()`

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

Description

If an attacker-controlled authoritative server can produce a negative answer that is exactly 65536 bytes, then a flaw in `named` results in a negative cache entry of 0 bytes. When this entry is subsequently read, `named` aborts. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.

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

  • 9.11.0 to ≤ 9.18.50affected
  • 9.20.0 to ≤ 9.20.27affected
  • 9.21.0 to ≤ 9.21.25affected
  • 9.11.3-S1 to ≤ 9.18.50-S1affected
  • 9.20.9-S1 to ≤ 9.20.27-S1affected

References