Description
In BIND 9.15.6 -> 9.16.5, 9.17.0 -> 9.17.3, An attacker who can establish a TCP connection with the server and send data on that connection can exploit this to trigger the assertion failure, causing the server to exit.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| ISC | BIND9 | 9.15.6 | — |
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 | 1:9.16.6-1 | — |
| Debian 13 | bind9 | 1:9.16.6-1 | — |
| Debian 12 | bind9 | 1:9.16.6-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | bind9 | 1:9.16.1-0ubuntu2.3 | USN-4468-1 |
| Ubuntu 18.04 LTS | bind9 | 1:9.11.3+dfsg-1ubuntu1.13 | USN-4468-1 |
| Ubuntu 16.04 LTS | bind9 | 1:9.10.3.dfsg.P4-8ubuntu1.17 | USN-4468-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP2 | bind | 9.16.6-12.32.1 | SUSE-SU-2020:2914-1 |
| SLES 15 SP2 | sysuser-tools | 2.0-4.2.8 | SUSE-SU-2020:2914-1 |
| SLES 15 SP1 | bind | 9.16.6-12.32.1 | SUSE-SU-2020:2914-1 |
| SLES 15 SP1 | sysuser-tools | 2.0-4.2.8 | SUSE-SU-2020:2914-1 |
| SLES 15 | bind | 9.16.6-12.32.1 | SUSE-SU-2020:2914-1 |
| SLES 15 | sysuser-tools | 2.0-4.2.8 | SUSE-SU-2020:2914-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 | bind | 9.16.6-12.32.1 | SUSE-SU-2020:2914-1 |
| SLES for SAP 15 | sysuser-tools | 2.0-4.2.8 | SUSE-SU-2020:2914-1 |
| SLE HPC 15 | bind | 9.16.6-12.32.1 | SUSE-SU-2020:2914-1 |
| SLE HPC 15 | sysuser-tools | 2.0-4.2.8 | SUSE-SU-2020:2914-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | bind | 9.16.20-1.4 | openSUSE-SU-2024:10650-1 |
| openSUSE Leap 15.2 | bind | 9.16.6-lp152.14.3.1 | openSUSE-SU-2020:1699-1 |
| openSUSE Leap 15.2 | libuv | 1.18.0-lp152.4.3.1 | openSUSE-SU-2020:1699-1 |
| openSUSE Leap 15.2 | sysuser-tools | 2.0-lp152.5.3.1 | openSUSE-SU-2020:1699-1 |
| openSUSE Leap 15.1 | bind | 9.16.6-lp151.11.9.1 | openSUSE-SU-2020:1701-1 |
| openSUSE Leap 15.1 | libuv | 1.18.0-lp151.3.3.1 | openSUSE-SU-2020:1701-1 |
| openSUSE Leap 15.1 | sysuser-tools | 2.0-lp151.4.3.1 | openSUSE-SU-2020:1701-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | bind | 9.16.6-r0 | — |
| Alpine v3.23 | bind | 9.16.6-r0 | — |
| Alpine v3.22 | bind | 9.16.6-r0 | — |
| Alpine v3.21 | bind | 9.16.6-r0 | — |
| Alpine v3.20 | bind | 9.16.6-r0 | — |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | bind | 9.16.6-r0 | — |
| Alpine v3.18 | bind | 9.16.6-r0 | — |
| Alpine v3.17 | bind | 9.16.6-r0 | — |
| Alpine v3.16 | bind | 9.16.6-r0 | — |
| Alpine v3.15 | bind | 9.16.6-r0 | — |
| Alpine v3.14 | bind | 9.16.6-r0 | — |
| Alpine v3.13 | bind | 9.16.6-r0 | — |
| Alpine v3.12 | bind | 9.16.6-r0 | — |
| Alpine v3.11 | bind | 9.16.6-r0 | — |
| Alpine v3.10 | bind | 9.16.6-r0 | — |
Advisories 5
- USN-4468-1 bind9 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- SUSE-SU-2020:2914-1 Security update for bind SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1699-1 Security update for bind SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10650-1 bind-9.16.20-1.4 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1701-1 Security update for bind SUSE / openSUSE Security Updates · Feb 4, 2026
References
- https://kb.isc.org/docs/cve-2020-8620
- https://security.netapp.com/advisory/ntap-20200827-0003/
- USN-4468-1 vendor-advisory
- GLSA-202008-19 vendor-advisory
- https://www.synology.com/security/advisory/Synology_SA_20_19
- openSUSE-SU-2020:1699 vendor-advisory
- openSUSE-SU-2020:1701 vendor-advisory