CVE-2026-1519
bind9 - security update
Description
If a BIND resolver is performing DNSSEC validation and encounters a maliciously crafted zone, the resolver may consume excessive CPU. Authoritative-only servers are generally unaffected, although there are circumstances where authoritative servers may make recursive queries (see: https://kb.isc.org/docs/why-does-my-authoritative-server-make-recursive-queries). This issue affects BIND 9 versions 9.11.0 through 9.16.50, 9.18.0 through 9.18.46, 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.46-S1, and 9.20.9-S1 through 9.20.20-S1.
How to fix CVE-2026-1519
To remediate CVE-2026-1519, upgrade the affected package to a fixed version below.
- —upgrade to 9.18.47-r0 or later
- —upgrade to 1:9.16.50-1~deb11u5 or later
- —upgrade to 1:9.18.47-1~deb12u1 or later
Is CVE-2026-1519 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 9.18.47-r0
- from 0, < 1:9.16.50-1~deb11u5
- from 0, < 1:9.18.47-1~deb12u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |