Linux Distros Unpatched Vulnerability : CVE-2026-55200

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 7acf3df contains an out-of-bounds write vulnerability in ssh2transportread that fails to enforce upper bounds on...

ALPINE-CVE-2026-55200

libssh2 through 1.11.1, fixed in commit 7acf3df contains an out-of-bounds write vulnerability in ssh2transportread that fails to enforce upper bounds on packetlength field. Remote attackers can send crafted SSH packets with excessively large packetlength values to corrupt heap memory and achieve...

DEBIAN-CVE-2026-55200

libssh2 through 1.11.1, fixed in commit 7acf3df contains an out-of-bounds write vulnerability in ssh2transportread that fails to enforce upper bounds on packetlength field. Remote attackers can send crafted SSH packets with excessively large packetlength values to corrupt heap memory and achieve...

CVE-2026-55200 libssh2 - Out-of-Bounds Write via Unchecked packet_length in transport.c

libssh2 through 1.11.1, fixed in commit 7acf3df contains an out-of-bounds write vulnerability in ssh2transportread that fails to enforce upper bounds on packetlength field. Remote attackers can send crafted SSH packets with excessively large packetlength values to corrupt heap memory and achieve...

EUVD-2026-37784

libssh2 through 1.11.1, fixed in commit 7acf3df contains an out-of-bounds write vulnerability in ssh2transportread that fails to enforce upper bounds on packetlength field. Remote attackers can send crafted SSH packets with excessively large packetlength values to corrupt heap memory and achieve...

CVE-2026-55200 libssh2 - Out-of-Bounds Write via Unchecked packet_length in transport.c

libssh2 through 1.11.1, fixed in commit 7acf3df contains an out-of-bounds write vulnerability in ssh2transportread that fails to enforce upper bounds on packetlength field. Remote attackers can send crafted SSH packets with excessively large packetlength values to corrupt heap memory and achieve...

CVE-2026-55200

libssh2 through 1.11.1, fixed in commit 7acf3df contains an out-of-bounds write vulnerability in ssh2transportread that fails to enforce upper bounds on packetlength field. Remote attackers can send crafted SSH packets with excessively large packetlength values to corrupt heap memory and achieve...

CVE-2026-55200

libssh2 through 1.11.1, fixed in commit 7acf3df contains an out-of-bounds write vulnerability in ssh2transportread that fails to enforce upper bounds on packetlength field. Remote attackers can send crafted SSH packets with excessively large packetlength values to corrupt heap memory and achieve...

PT-2026-50528

Name of the Vulnerable Software and Affected Versions libssh2 versions prior to 1.11.2 Description An out-of-bounds write issue exists in the ssh2 transport read function due to an integer overflow and a failure to enforce upper bounds on the packet length field. A remote attacker operating a...

libssh2: Fix of 2 CVEs

CVE-2019-3860: bounds-check SFTP packet sizes in sftppacketrequire/v and sftpbin2attr - CVE-2019-3861: bounds-check paddinglength in libssh2transportread...

Astra Linux – Vulnerability in libssh2

libssh2 from version 1.11.1 onwards, fixed in commit 7acf3df, contains an out-of-bounds write vulnerability in ssh2transportread. This vulnerability occurs because the upper bound on the packetlength field is not enforced. Remote attackers can send crafted SSH packets with excessively large...

OSV-2025-433 Null-dereference READ in _libssh2_packet_add

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=422217191 Crash type: Null-dereference READ Crash state: libssh2packetadd fullpacket libssh2transportread...

libssh2: use-of-uninitialized-value in _libssh2_transport_read

A flaw was found in the libssh2 library. An out-of-bounds access issue can occur due to an improper initialization of a variable, resulting in a crash in the application linked to the library...

RHEL 7 : libssh2 (RHSA-2019:2399)

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2019:2399 advisory. The libssh2 packages provide a library that implements the SSH2 protocol. Security Fixes: libssh2: Integer overflow in transport read...

libssh2: Integer overflow in transport read resulting in out of bounds write

An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server...

libssh2: Integer overflow in transport read resulting in out of bounds write

An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server...

libssh2: Integer overflow in transport read resulting in out of bounds write

An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server...

Scientific Linux Security Update : libssh2 on SL6.x i386/x86_64 (20190702)

Security Fixes : - libssh2: Integer overflow in transport read resulting in out of bounds write CVE-2019-3855 - libssh2: Integer overflow in keyboard interactive handling resulting in out of bounds write CVE-2019-3856 - libssh2: Integer overflow in SSH packet processing channel resulting in out o...

libssh2: Integer overflow in transport read resulting in out of bounds write

An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server...

libssh2: Integer overflow in transport read resulting in out of bounds write

An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server...