CVE-2026-3731

Publication date 8 March 2026

Last updated 17 March 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

5.3 · Medium

Score breakdown

Description

A weakness has been identified in libssh up to 0.11.3. The impacted element is the function sftp_extensions_get_name/sftp_extensions_get_data of the file src/sftp.c of the component SFTP Extension Name Handler. Executing a manipulation of the argument idx can lead to out-of-bounds read. The attack may be performed from remote. Upgrading to version 0.11.4 and 0.12.0 is sufficient to resolve this issue. This patch is called 855a0853ad3abd4a6cd85ce06fce6d8d4c7a0b60. You should upgrade the affected component.

Status

Package Ubuntu Release Status
libssh 25.10 questing
Fixed 0.11.2-1ubuntu0.3
24.04 LTS noble
Fixed 0.10.6-2ubuntu0.4
22.04 LTS jammy
Fixed 0.9.6-2ubuntu0.22.04.7
20.04 LTS focal
Fixed 0.9.3-2ubuntu2.5+esm4
18.04 LTS bionic
Fixed 0.8.0~20170825.94fa1e38-1ubuntu0.7+esm7
16.04 LTS xenial
Fixed 0.6.3-4.3ubuntu0.6+esm5

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Severity score breakdown

Parameter Value
Base score 5.3 · Medium
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact Low
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References

Related Ubuntu Security Notices (USN)

Other references

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