RHSA-2026:18160 Red Hat Security Advisory: libssh security update

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libssh: libssh: Denial of Service via improper configuration file handling

A flaw was found in libssh where it can attempt to open arbitrary files during configuration parsing. A local attacker can exploit this by providing a malicious configuration file or when the system is misconfigured. This vulnerability could lead to a Denial of Service DoS by causing the system t...

libssh: libssh: Denial of Service via inefficient regular expression processing

A flaw was found in libssh. A remote attacker, by controlling client configuration files or knownhosts files, could craft specific hostnames that when processed by the matchpattern function can lead to inefficient regular expression backtracking. This can cause timeouts and resource exhaustion,...

libssh: libssh: Denial of Service via zero-length input in ssh_get_hexa()

A flaw was found in libssh. The API function sshgethexa is vulnerable to a denial of service when processing zero-length input. This can be exploited remotely by an attacker during GSSAPI Generic Security Service Application Program Interface authentication if the server's logging verbosity is se...

Moderate: Red Hat Security Advisory: libssh security update

An update for libssh is now available for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from th...

libssh: Improper sanitation of paths received from SCP servers

A malicious SCP server can send unexpected paths that could make the client application override local files outside of working directory. This could be misused to create malicious executable or configuration files and make the user execute them under specific consequences. This is the same issue...

libssh: libssh: Denial of Service due to malformed SFTP message

A flaw was found in libssh in which a malicious SFTP SSH File Transfer Protocol server can exploit this by sending a malformed 'longname' field within an SSHFXPNAME message during a file listing operation. This missing null check can lead to reading beyond allocated memory on the heap. This can...

Moderate: libssh security update

libssh is a library which implements the SSH protocol. It can be used to implement client and server applications. Security Fixes: libssh: Double Free Vulnerability in libssh Key Export Functions CVE-2025-5351 libssh: Use of uninitialized variable in privatekeyfromfile CVE-2025-4878 libssh: Write...

RHEL 10 : libssh (RHSA-2026:18160)

The remote Redhat Enterprise Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:18160 advisory. libssh is a library which implements the SSH protocol. It can be used to implement client and server applications. Security Fixes: libssh:...

ALSA-2026:18683 Moderate: libssh security update

libssh is a library which implements the SSH protocol. It can be used to implement client and server applications. Security Fixes: libssh: Double Free Vulnerability in libssh Key Export Functions CVE-2025-5351 libssh: Use of uninitialized variable in privatekeyfromfile CVE-2025-4878 libssh: Write...

curl: libssh SFTP initialization ignores CURLOPT_TIMEOUT, hangs indefinitely

Hi all, The libssh backend in lib/vssh/libssh.c ignores CURLOPTTIMEOUT / --max-time during SFTP subsystem negotiation. A server that completes SSH authentication and then stalls before answering the SSHFXPINIT packet will pin the curl process indefinitely — no timeout fires, no error is returned,...

Unity Linux 20.1060e / 20.1070e Security Update: libssh (UTSA-2026-017426)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-017426 advisory. A flaw has been found in libssh in versions prior to 0.9.6. The SSH protocol keeps track of two shared secrets during the lifetime of the session. One of them is...

CVE-2026-0964 affecting package libssh for versions less than 0.10.6-7

CVE-2026-0964 affecting package libssh for versions less than 0.10.6-7. A patched version of the package is available...

CVE-2026-0967 affecting package libssh for versions less than 0.10.6-7

CVE-2026-0967 affecting package libssh for versions less than 0.10.6-7. A patched version of the package is available...

CVE-2026-0965 affecting package libssh for versions less than 0.10.6-7

CVE-2026-0965 affecting package libssh for versions less than 0.10.6-7. A patched version of the package is available...

CVE-2026-0966 affecting package libssh for versions less than 0.10.6-7

CVE-2026-0966 affecting package libssh for versions less than 0.10.6-7. A patched version of the package is available...

CLSA-2026-1778269628 libssh: Fix of CVE-2026-0964

CVE-2026-0964: SCP path traversal via crafted filenames in sshscppullrequest allowing files to be written outside the intended directory...

CLSA-2026-1778237316 libssh: Fix of CVE-2026-0964

CVE-2026-0964: reject invalid filenames in sshscppullrequest to prevent path traversal via SCP...

CLSA-2026-1777939234 libssh: Fix of CVE-2026-0966

CVE-2026-0966: fix heap buffer underflow in sshgethexa on NULL or zero-length input, remotely reachable via GSSAPI authentication logging...

SUSE SLES16 Security Update : libssh (SUSE-SU-2026:21428-1)

The remote SUSE Linux SLES16 / SLESSAP16 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:21428-1 advisory. - Update to version 0.11.4: - CVE-2026-0964: SCP Protocol Path Traversal in sshscppullrequest bsc1258049 - CVE-2026-0965: Possible...