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Ubuntu 22.04 OpenSSH Important Remote Access Issues USN-8222

Linuxsecurity •LinuxSecurity Advisories • April 29, 2026

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 26.04 LTS - Ubuntu 25.10 - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS Summary: Several security issues were fixed in OpenSSH. Software Description: - openssh: secure shell (SSH) for secure access to remote machines Details: Christos Papakonstantinou discovered that the OpenSSH scp tool incorrectly handled the legacy scp protocol (-O) option. This could result in certain files being installed setuid or setgid, contrary to expectations. (CVE-2026-35385) Florian Kohnh�user discovered that OpenSSH incorrectly handled shell metacharacters in usernames within a command line. When untrusted usernames and non-default configurations using % in ssh_config are being used, an attacker could possibly use this issue to execute arbitrary code. (CVE-2026-35386) Christos Papakonstantinou discovered that OpenSSH incorrectly handled parsing the PubkeyAcceptedAlgorithms and HostbasedAcceptedAlgorithms

The problem can be corrected by updating your system to the following package versions: Ubuntu 26.04 LTS openssh-client 1:10.2p1-2ubuntu3.2 openssh-server 1:10.2p1-2ubuntu3.2 Ubuntu 25.10 openssh-client 1:10.0p1-5ubuntu5.4 openssh-server 1:10.0p1-5ubuntu5.4 Ubuntu 24.04 LTS openssh-client 1:9.6p1-3ubuntu13.16 openssh-server 1:9.6p1-3ubuntu13.16 Ubuntu 22.04 LTS openssh-client 1:8.9p1-3ubuntu0.15 openssh-server 1:8.9p1-3ubuntu0.15 In general, a standard system update will make all the necessary changes.

CVE-2026-35385, CVE-2026-35386, CVE-2026-35387, CVE-2026-35388, CVE-2026-35414

CVE-2026-35385, CVE-2026-35386, CVE-2026-35387, CVE-2026-35388,

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Critical OpenSSH Vulnerabilities Affecting Multiple Ubuntu Versions Multiple vulnerabilities in OpenSSH have been discovered, affecting Ubuntu 22.04 LTS and its derivatives. Key issues include improper handling of the legacy scp protocol, which could lead to unintended setuid or setgid file installations (CVE-2026-35385), and vulnerabilities allowing arbitrary code execution via crafted usernames (CVE-2026-35386). Other vulnerabilities involve incorrect parsing of security options (CVE-2026-35387) and proxy-mode multiplexing issues (CVE-2026-35388). The vulnerabilities were published on April 2, 2026, with the first public proof of concept for CVE-2026-35414 released today. Users are advised to update their systems to mitigate these risks. The affected versions include Ubuntu 26.04 LTS, 25.10, 24.04 LTS, and 22.04 LTS, with specific package versions provided for remediation. 2 sources 74

Extracted Entities

Ubuntu 22.04 OpenSSH Important Remote Access Issues USN-8222

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Extracted Entities

Companies (1)

CVEs (5)

CWE Weaknesses (2)

Platforms (1)