CVE-2026-73282
Publication date 11 August 2026
Last updated 4 September 2026
Ubuntu priority
Medium
Description
In ssh in OpenSSH before 10.5, a use-after-free for realloc data can occur if a certain pair of remote-forwarding operations are concurrent.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| openssh | 26.04 LTS resolute |
Fixed 1:10.2p1-2ubuntu3.6
|
| 24.04 LTS noble |
Fixed 1:9.6p1-3ubuntu13.19
|
|
| 22.04 LTS jammy |
Fixed 1:8.9p1-3ubuntu0.17
|
|
| 20.04 LTS focal |
Needs evaluation
|
|
| 18.04 LTS bionic |
Needs evaluation
|
|
| 16.04 LTS xenial |
Needs evaluation
|
|
| 14.04 LTS trusty |
Needs evaluation
|
|
| openssh-ssh1 | 26.04 LTS resolute | Ignored |
| 24.04 LTS noble | Ignored | |
| 22.04 LTS jammy | Ignored | |
| 20.04 LTS focal | Ignored | |
| 18.04 LTS bionic | Ignored |
Notes
mdeslaur
openssh-ssh1 is only provided for compatibility with old devices that cannot be upgraded to modern protocols. We will not be providing any security support for the openssh-ssh1 package as it is insecure and should be used in trusted environments only.
Patch details
For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?
| Package | Patch details |
|---|---|
| openssh |
|
Severity score breakdown
CVSS version: CVSS v3.0
Base score 4.8 · Medium
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
References
Related Ubuntu Security Notices (USN)
- USN-8721-1
- OpenSSH vulnerabilities
- 3 September 2026