Skip to content
Sign in
7.5 High

CVE-2026-19630 In a BIND resolver, inbound DNS protocol messages with a particular structure will result in additional processing, with…

Description

In a BIND resolver, inbound DNS protocol messages with a particular structure will result in additional processing, with no limit imposed by BIND. A DNS message with a maliciously large number of such structures will cause BIND to consume disproportionate amounts of CPU time and memory during processing. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.29, 9.21.0 through 9.21.26, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.29-S1.

Affected products and versions

Product Affected versions Fixed in
BIND 9 9.21 9.21.0 → 9.21.26 No fix stated
BIND 9 9.20 9.20.0 → 9.20.29 No fix stated
BIND 9 9.11 9.11.0 → 9.18.50 No fix stated

Other CVEs of BIND 9

The 87 CVEs of BIND 9 →
CVE-2026-97313 A recursive BIND server that receives a query with recursion desired (RD=1) followed by a non-recursive query (RD=0) may… 7.5 High CVE-2026-96888 A BIND resolver that is configured with both a "redirect" zone and "qname-minimization strict" may abort with an… 7.5 High CVE-2026-94300 Replaying GSS-TSIG signed UDP messages can result in memory corruption in "`named`" 8.1 High CVE-2026-77119 A validly signed NSEC3 from an unrelated sibling zone may be accepted as an insecurity proof, downgrading a secure… 5.9 Medium
Track this CVE