Improper Check or Handling of Exceptional Conditions in ISC BIND - CVE-2026-3119
Published: March 25, 2026
Vulnerability identifier: #VU124614
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-3119
CWE-ID: CWE-703
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to improper handling of TKEY records in the DNS query processing component when processing a signed query containing a TKEY record. A remote user can send a specially crafted, correctly signed query containing a TKEY record to cause named to terminate unexpectedly.
Successful exploitation requires that the attacker possesses a valid TSIG key configured in the target's named configuration. Both authoritative servers and resolvers are affected.
Affected software
ISC BIND
Debian Linux
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
Basesystem Module
Server Applications Module
Ubuntu
Fedora
bind9 (Ubuntu package)
bind9 (Debian package)
bind-debuginfo
bind-utils
bind-utils-debuginfo
bind-debugsource
bind
bind-doc
bind9-next
Debian Linux
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
Basesystem Module
Server Applications Module
Ubuntu
Fedora
bind9 (Ubuntu package)
bind9 (Debian package)
bind-debuginfo
bind-utils
bind-utils-debuginfo
bind-debugsource
bind
bind-doc
bind9-next
How to mitigate CVE-2026-3119
Install security update from vendor's website.
ISC BIND - addressed in versions 9.20.21, 9.20.21-S1, 9.21.20
bind9 (Ubuntu package) - addressed in versions 1:9.18.39-0ubuntu0.22.04.3, 1:9.18.39-0ubuntu0.24.04.3, 1:9.20.11-1ubuntu2.2
bind9 (Debian package) - addressed in versions 1:9.18.47-1~deb12u1, 1:9.20.21-1~deb13u1
bind-debuginfo - update to 9.20.21-150700.3.18.1
bind-utils - update to 9.20.21-150700.3.18.1
bind-utils-debuginfo - update to 9.20.21-150700.3.18.1
bind-debugsource - update to 9.20.21-150700.3.18.1
bind - update to 9.20.21-150700.3.18.1
bind-doc - update to 9.20.21-150700.3.18.1
bind9-next - addressed in versions 9.21.20-1.fc42, 9.21.20-1.fc43, 9.21.20-1.fc44
bind9 (Ubuntu package) - addressed in versions 1:9.18.39-0ubuntu0.22.04.3, 1:9.18.39-0ubuntu0.24.04.3, 1:9.20.11-1ubuntu2.2
bind9 (Debian package) - addressed in versions 1:9.18.47-1~deb12u1, 1:9.20.21-1~deb13u1
bind-debuginfo - update to 9.20.21-150700.3.18.1
bind-utils - update to 9.20.21-150700.3.18.1
bind-utils-debuginfo - update to 9.20.21-150700.3.18.1
bind-debugsource - update to 9.20.21-150700.3.18.1
bind - update to 9.20.21-150700.3.18.1
bind-doc - update to 9.20.21-150700.3.18.1
bind9-next - addressed in versions 9.21.20-1.fc42, 9.21.20-1.fc43, 9.21.20-1.fc44