SUSE-SU-2026:3330-1 Security update for libssh

This update for libssh fixes the following issues: - CVE-2026-59843: denial of service via zero advertised channel packet size bsc1272164. - CVE-2026-59844: denial of service via oversized SFTP read length bsc1272165. - CVE-2026-59845: denial of service via unchecked ProxyCommand fork failure...

SUSE CVE-2026-59845

A flaw was found in libssh. When ProxyCommand is used, an unchecked fork failure can be stored as process ID -1; during cleanup, signals may then be sent across the caller's accessible process tree, leading to local denial of service...

libssh: libssh: denial of service via unchecked ProxyCommand fork() failure

A flaw was found in libssh. When ProxyCommand is used, an unchecked fork failure can be stored as process ID -1; during cleanup, signals may then be sent across the caller's accessible process tree, leading to local denial of service...

CVE-2026-59845

A flaw was found in libssh. When ProxyCommand is used, an unchecked fork failure can be stored as process ID -1; during cleanup, signals may then be sent across the caller's accessible process tree, leading to local denial of service...

CVE-2026-59845

A flaw was found in libssh. When ProxyCommand is used, an unchecked fork failure can be stored as process ID -1; during cleanup, signals may then be sent across the caller's accessible process tree, leading to local denial of service...

EUVD-2026-46178

A flaw was found in libssh. When ProxyCommand is used, an unchecked fork failure can be stored as process ID -1; during cleanup, signals may then be sent across the caller's accessible process tree, leading to local denial of service...

CVE-2026-59845 Libssh: libssh: denial of service via unchecked proxycommand fork() failure

A flaw was found in libssh. When ProxyCommand is used, an unchecked fork failure can be stored as process ID -1; during cleanup, signals may then be sent across the caller's accessible process tree, leading to local denial of service...

CVE-2026-59845

A flaw was found in libssh. When ProxyCommand is used, an unchecked fork failure can be stored as process ID -1; during cleanup, signals may then be sent across the caller's accessible process tree, leading to local denial of service...

CVE-2026-59845

A flaw was found in libssh. When ProxyCommand is used, an unchecked fork failure can be stored as process ID -1; during cleanup, signals may then be sent across the caller's accessible process tree, leading to local denial of service...

CVE-2026-59845

CVE-2026-59845 describes a vulnerability in the libssh library where, when using the ProxyCommand feature, an unchecked fork() failure can be stored as PID -1. During cleanup, signals may be sent across the caller’s process tree, enabling local denial of service. The Red Hat advisory confirms thi...

CVE-2026-59845

A flaw was found in libssh. When ProxyCommand is used, an unchecked fork failure can be stored as process ID -1; during cleanup, signals may then be sent across the caller's accessible process tree, leading to local denial of service. Mitigation To mitigate this issue, avoid using the ProxyComman...

Denial of Service (DoS)

Overview Affected versions of this package are vulnerable to Denial of Service DoS in the ProxyCommand process. An attacker can disrupt local system availability by triggering an unchecked fork failure, which causes signals to be sent across the process tree. This is only exploitable if the...

PT-2026-61859

Name of the Vulnerable Software and Affected Versions libssh affected versions not specified Description A flaw exists in libssh when using the ProxyCommand feature. An unchecked failure in the fork function can result in a process ID of -1 being stored. During the cleanup process, signals may be...

Astra Linux – Vulnerability found in Linux 6.12, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: x86/mm/pat: Fixed the handling of VMPAT when fork fails in copypagerange. If trackpfncopy fails, we have already added the dst VMA to the maple tree. When fork fails, we will clean up the maple tree, and encounter issues with the...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerabilities have been resolved: s390: fixed the issue where double-free of GS and RI CBs occurs during fork failures. The pointers for guarded storage and runtime instrumentation control blocks are stored in the threadstruct of the associated task. These...

Linux kernel 安全漏洞

The Linux kernel is the core of the open-source operating system Linux, developed by the Linux Foundation in the United States. There is a security vulnerability in the Linux kernel, which stems from the sched/mmcid module assigning CIDs during the fork process when new tasks are not yet visible...

CVE-2026-2261

Due to a programming error, blocklistd leaks a socket descriptor for each adverse event report it receives. Once a certain number of leaked sockets is reached, blocklistd becomes unable to run the helper script: a child process is forked, but this child dereferences a null pointer and crashes...

Unity Linux 20.1050e Security Update: kernel (UTSA-2026-004852)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-004852 advisory. In the Linux kernel, the following vulnerability has been resolved: s390: fix double free of GS and RI CBs on fork failure The pointers for guarded storage and runti...

Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-003433)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-003433 advisory. A use-after-free flaw was found in fs/userfaultfd.c in the Linux kernel before 4.13.6. The issue is related to the handling of fork failure when dealing with event...

Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2025-992979)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-992979 advisory. In the Linux kernel, the following vulnerability has been resolved: s390: fix double free of GS and RI CBs on fork failure The pointers for guarded storage and runti...