CentOS Linux 6 [TuxCare] Security Update: libssh2 / libssh2-devel / libssh2-docs (CENTOS6:CLSA-2026:1784282780)

The CentOS Linux 6 host has packages installed that are affected by a vulnerability as referenced in the TuxCare CENTOS6:CLSA-2026:1784282780 advisory. - libssh2 through 1.11.1 reads an attacker-controlled 32-bit attribute count from a publickey-subsystem response and uses it in the allocation...

USN-8799-1 libssh2 vulnerabilities

It was discovered that libssh2 incorrectly handled certain publickey subsystem attributes. A remote attacker controlling a malicious SSH server could use this issue to cause a denial of service or possibly execute arbitrary code. CVE-2026-58050 It was discovered that libssh2 did not properly...

Ubuntu 14.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / Pro Realtime 22.04 LTS : libssh2 vulnerabilities (USN-8799-1)

The remote Ubuntu 14.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / Pro Realtime 22.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-8799-1 advisory. It was discovered that libssh2 incorrectly handled certain publickey subsystem attributes. A...

EulerOS Virtualization 2.10.1 : libssh2 (EulerOS-SA-2026-3838)

According to the versions of the libssh2 packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : libssh2 through 1.11.1 reads an attacker-controlled 32-bit attribute count from a publickey-subsystem response and uses it in the...

EulerOS Virtualization 2.10.0 : libssh2 (EulerOS-SA-2026-3872)

According to the versions of the libssh2 packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : libssh2 through 1.11.1 reads an attacker-controlled 32-bit attribute count from a publickey-subsystem response and uses it in the...

EulerOS 2.0 SP10 : libssh2 (EulerOS-SA-2026-3749)

According to the versions of the libssh2 packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : libssh2 through 1.11.1 reads an attacker-controlled 32-bit attribute count from a publickey-subsystem response and uses it in the allocation...

EulerOS Virtualization 2.12.1 : libssh2 (EulerOS-SA-2026-3594)

According to the versions of the libssh2 package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : libssh2 through 1.11.1 reads an attacker-controlled 32-bit attribute count from a publickey-subsystem response and uses it in the...

EulerOS 2.0 SP10 : libssh2 (EulerOS-SA-2026-3701)

According to the versions of the libssh2 packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : libssh2 through 1.11.1 reads an attacker-controlled 32-bit attribute count from a publickey-subsystem response and uses it in the allocation...

EulerOS Virtualization 2.12.0 : libssh2 (EulerOS-SA-2026-3648)

According to the versions of the libssh2 package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : libssh2 through 1.11.1 reads an attacker-controlled 32-bit attribute count from a publickey-subsystem response and uses it in the...

libssh2: libssh2: Information disclosure and potential arbitrary code execution via heap out-of-bounds read

A missing bounds check in the libssh2 publickey subsystem allows malicious SSH servers to trigger a client-side out-of-bounds read, leaking heap pointers that could enable security bypasses, denial of service, or code execution...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: libssh2 (UTSA-2026-102700)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-102700 advisory. libssh2 through 1.11.1 reads an attacker-controlled 32-bit attribute count from a publickey-subsystem response and uses it in the allocation numattrs...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: libssh2 (UTSA-2026-102688)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-102688 advisory. libssh2 through 1.11.1, fixed in commit a13bb6c, contains a missing bounds check vulnerability that allows a malicious SSH server to trigger an arbitrary-length heap...

Amazon Linux 2 : libssh2, --advisory ALAS2-2026-3861 (ALAS-2026-3861)

The version of libssh2 installed on the remote host is prior to 1.4.3-12. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2026-3861 advisory. libssh2 through 1.11.1, fixed in commit 5e47761, contains a double-free vulnerability in the sftpopen function in...

Important: libssh2

Issue Overview: libssh2 through 1.11.1, fixed in commit 5e47761, contains a double-free vulnerability in the sftpopen function in src/sftp.c that allows a malicious SSH server to corrupt the heap of any authenticated client opening an SFTP session. When a server responds to SSHFXPOPEN with...

JLSEC-2026-1087 libssh2 through 1.11.1, fixed in commit a13bb6c, contains a missing bounds check vulnerability...

libssh2 through 1.11.1, fixed in commit a13bb6c, contains a missing bounds check vulnerability that allows a malicious SSH server to trigger an arbitrary-length heap out-of-bounds read and a free of an uninitialized pointer via the publickey subsystem. In libssh2publickeylistfetch, the version 1...

libssh2: libssh2: Information disclosure and potential arbitrary code execution via heap out-of-bounds read

A missing bounds check in the libssh2 publickey subsystem allows malicious SSH servers to trigger a client-side out-of-bounds read, leaking heap pointers that could enable security bypasses, denial of service, or code execution...

Linux Distros Unpatched Vulnerability : CVE-2026-66034

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - libssh2 through 1.11.1, fixed in commit a13bb6c, contains a missing bounds check vulnerability that allows a malicious SSH server to trigger an arbitrary-length...

AZL-97410 CVE-2026-66034 affecting package rust for versions less than 1.96.0-1

libssh2 through 1.11.1, fixed in commit a13bb6c, contains a missing bounds check vulnerability that allows a malicious SSH server to trigger an arbitrary-length heap out-of-bounds read and a free of an uninitialized pointer via the publickey subsystem. In libssh2publickeylistfetch, the version 1...

AZL-93393 CVE-2026-66034 affecting package libssh2 for versions less than 1.11.1-5

libssh2 through 1.11.1, fixed in commit a13bb6c, contains a missing bounds check vulnerability that allows a malicious SSH server to trigger an arbitrary-length heap out-of-bounds read and a free of an uninitialized pointer via the publickey subsystem. In libssh2publickeylistfetch, the version 1...

DEBIAN-CVE-2026-66034

libssh2 through 1.11.1, fixed in commit a13bb6c, contains a missing bounds check vulnerability that allows a malicious SSH server to trigger an arbitrary-length heap out-of-bounds read and a free of an uninitialized pointer via the publickey subsystem. In libssh2publickeylistfetch, the version 1...