CVE-2026-6949
Publication date 28 July 2026
Last updated 7 August 2026
Ubuntu priority
Description
TSIG packet with name compression can crash DNS. Incorrect size calculations when a TSIG record contains compressed names can lead to a large out-of-bounds write causing the server to crash.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| samba | 26.04 LTS resolute |
Fixed 2:4.23.6+dfsg-1ubuntu2.2
|
| 24.04 LTS noble |
Fixed 2:4.19.5+dfsg-4ubuntu9.7
|
|
| 22.04 LTS jammy |
Fixed 2:4.15.13+dfsg-0ubuntu1.13
|
|
| 20.04 LTS focal |
Needs evaluation
|
|
| 18.04 LTS bionic |
Needs evaluation
|
|
| 16.04 LTS xenial |
Needs evaluation
|
|
| 14.04 LTS trusty |
Needs evaluation
|
References
Related Ubuntu Security Notices (USN)
- USN-8621-1
- Samba vulnerabilities
- 28 July 2026