Description
buffer.c in named in ISC BIND 9 before 9.9.9-P3, 9.10.x before 9.10.4-P3, and 9.11.x before 9.11.0rc3 does not properly construct responses, which allows remote attackers to cause a denial of service (assertion failure and daemon exit) via a crafted query.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | bind9 | 1:9.10.3.dfsg.P4-11 | — |
| Debian 13 | bind9 | 1:9.10.3.dfsg.P4-11 | — |
| Debian 12 | bind9 | 1:9.10.3.dfsg.P4-11 | — |
| Debian 8 | bind9 | 1:9.9.5.dfsg-9+deb8u7 | DSA-3680-1 |
| Debian 7 | bind9 | 1:9.8.4.dfsg.P1-6+nmu2+deb7u11 | DLA-645-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | bind9 | 1:9.10.3.dfsg.P4-8ubuntu1.1 | USN-3088-1 |
| Ubuntu 14.04 LTS | bind9 | 1:9.9.5.dfsg-3ubuntu0.9 | USN-3088-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | bind +13 | 32:9.9.4-29.el7_2.4 | RHSA-2016:1944 |
| RHEL 6 | bind +5 | 32:9.8.2-0.47.rc1.el6_8.1 | RHSA-2016:1944 |
| RHEL 5 | bind +7 | 30:9.3.6-25.P1.el5_11.9 | RHSA-2016:1944 |
| RHEL 5 | bind97 +4 | 32:9.7.0-21.P2.el5_11.7 | RHSA-2016:1945 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Mission Critical 6 | bind +5 | 32:9.7.3-8.P3.el6_2.5 | RHSA-2016:2099 |
| RHEL 6.7 EUS | bind +5 | 32:9.8.2-0.37.rc1.el6_7.8 | RHSA-2016:2099 |
| RHEL 6.6 EUS | bind +5 | 32:9.8.2-0.30.rc1.el6_6.6 | RHSA-2016:2099 |
| RHEL 6.5 TUS | bind +5 | 32:9.8.2-0.23.rc1.el6_5.4 | RHSA-2016:2099 |
| RHEL 6.5 AUS | bind +5 | 32:9.8.2-0.23.rc1.el6_5.4 | RHSA-2016:2099 |
| RHEL 6.4 AUS | bind +5 | 32:9.8.2-0.17.rc1.el6_4.9 | RHSA-2016:2099 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | bind | 9.9.9P1-46.1 | SUSE-SU-2016:2399-1 |
| SLES 12 | bind | 9.9.9P1-28.20.1 | SUSE-SU-2016:2401-1 |
| SLES 11 SP4 | bind | 9.9.6P1-0.30.1 | SUSE-SU-2016:2405-1 |
| SLES 11 SP3 | bind | 9.9.6P1-0.30.1 | SUSE-SU-2016:2405-1 |
| SLES 11 SP2 | bind | 9.9.6P1-0.30.1 | SUSE-SU-2016:2405-1 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | bind | 9.9.9P1-46.1 | SUSE-SU-2016:2399-1 |
| SLES for SAP 12 | bind | 9.9.9P1-28.20.1 | SUSE-SU-2016:2401-1 |
| SLES for SAP 11 SP4 | bind | 9.9.6P1-0.30.1 | SUSE-SU-2016:2405-1 |
| SUSE OpenStack Cloud 5 | bind | 9.9.6P1-0.30.1 | SUSE-SU-2016:2405-1 |
| SUSE Manager Proxy 2.1 | bind | 9.9.6P1-0.30.1 | SUSE-SU-2016:2405-1 |
| SUSE Manager 2.1 | bind | 9.9.6P1-0.30.1 | SUSE-SU-2016:2405-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | bind | 9.9.6P1-0.30.1 | SUSE-SU-2016:2405-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | bind | 9.10.3P4-21.1 | openSUSE-SU-2024:10467-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.3 | bind | 9.10.4_p3-r0 | — |
| Alpine v3.2 | bind | 9.10.4_p3 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | bind +13 | 32:9.9.4-29.el7_2.4 | ELSA-2016-1944 |
| Oracle Linux 7 | bind-libbind-devel +1 | 30:9.3.6-25.P1.el5_11.9 | ELSA-2016-1944 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Metasploit 1 module
-
BIND TSIG Query Denial of Service
auxiliary/dos/dns/bind_tsig
Exploit-DB 1
- ISC BIND 9 - Denial of Service EDB-40453 · dos · Oct 4, 2016
GitHub 1 repository
-
infobyte/CVE-2016-2776 ★ 27 · Sep 30, 2016
CVE-2016-2776
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 12
- RHSA-2016:2099 Red Hat Security Advisory: bind security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2016:1944 Red Hat Security Advisory: bind security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2016:1945 Red Hat Security Advisory: bind97 security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-3088-1 bind9 vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-645-1 bind9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3680-1 bind9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2016:2401-1 Security update for bind SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2399-1 Security update for bind SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10467-1 bind-9.10.3P4-21.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2025-1186 Internet Systems Consortium BIND: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · May 29, 2025
- SUSE-SU-2016:2405-1 Security update for bind SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2016-1944 Important: bind security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Sep 28, 2016
References
- 93188 vdb-entry
- https://kb.isc.org/article/AA-01438
- https://kb.isc.org/article/AA-01419/0
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html
- RHSA-2016:1944 vendor-advisory
- 40453 exploit
- GLSA-201610-07 vendor-advisory
- https://kb.isc.org/article/AA-01435
- RHSA-2016:2099 vendor-advisory
- https://security.netapp.com/advisory/ntap-20160930-0001/
- http://www.oracle.com/technetwork/topics/security/bulletinoct2016-3090566.html
- 1036903 vdb-entry
- http://www.oracle.com/technetwork/topics/security/ovmbulletinoct2016-3090547.html
- FreeBSD-SA-16:28 vendor-advisory
- RHSA-2016:1945 vendor-advisory
- https://kb.isc.org/article/AA-01436
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05321107