CVE-2026-58050 libssh2 - Integer Overflow in publickey Subsystem Attribute Allocation

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 sizeoflibssh2publickeyattribute without bounds checking, so on 32-bit platforms the multiplication overflows to an undersized buffer. A malicious S...

CVE-2026-58050 libssh2 - Integer Overflow in publickey Subsystem Attribute Allocation

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 sizeoflibssh2publickeyattribute without bounds checking, so on 32-bit platforms the multiplication overflows to an undersized buffer. A malicious S...

CVE-2026-58050

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 sizeoflibssh2publickeyattribute without bounds checking, so on 32-bit platforms the multiplication overflows to an undersized buffer. A malicious S...

CVE-2026-58051: Use of Uninitialized Resource

libssh2 through 1.11.1 grows its publickey list with SSH2REALLOC but does not zero-initialize new entries before parsing populates them, so a parse failure reaching the cleanup path leaves libssh2publickeylistfree operating on an uninitialized entry. A malicious SSH server offering the publickey...

Linux Distros Unpatched Vulnerability : CVE-2026-58050

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 reads an attacker-controlled 32-bit attribute count from a publickey-subsystem response and uses it in the allocation numattrs...

CVE-2026-58050: Integer Overflow or Wraparound

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 sizeoflibssh2publickeyattribute without bounds checking, so on 32-bit platforms the multiplication overflows to an undersized buffer. A malicious S...

Linux Distros Unpatched Vulnerability : CVE-2026-58051

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 grows its publickey list with SSH2REALLOC but does not zero-initialize new entries before parsing populates them, so a parse failure...

libssh2 - Heap Buffer Over-read via sftp_symlink() in sftp.c

...

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

...

libssh2 - Pre-Authentication DoS via SSH_MSG_EXT_INFO Handler

...

PT-2026-53082

Name of the Vulnerable Software and Affected Versions libssh2 versions prior to 1.11.2 Description An integer overflow occurs when the software reads an attacker-controlled 32-bit attribute count from a publickey-subsystem response. This value is used in the allocation num attrs sizeoflibssh2...

PT-2026-54532

Уязвимость функции publickey response success библиотеки libssh2 связана с целочисленным переполнением. Эксплуатация уязвимости может позволить нарушителю, действующему удаленно, вызвать отказ в обслуживании или выполнить произвольный код...

CVE-2026-55200 affecting package libssh2 for versions less than 1.11.1-3

CVE-2026-55200 affecting package libssh2 for versions less than 1.11.1-3. A patched version of the package is available...

curl: ssh_config_matches is dead code: unauthorized SSH key reuse

Summary libcurl's SSH connection-reuse guard sshconfigmatches — added for CVE-2022-27782 and reaffirmed by CVE-2023-27538 — is dead code in every release since 7.83.1. It compares sshc-rsa / sshc-rsapub between a new transfer "needle" and a pooled connection, but on both sides those pointers are...

PT-2026-53083

Name of the Vulnerable Software and Affected Versions libssh2 versions prior to 1.11.2 Description An issue exists in the public key parsing process where the software expands its public key list using SSH2 REALLOC but fails to zero-initialize new entries before they are populated. If a parse...

Critical Photon OS Security Update - PHSA-2026-5.0-91-0900

Updates of 'libssh2', 'perl' packages of Photon OS have been released...

Critical Photon OS Security Update - PHSA-2026-5.0-92-0900

Updates of 'libssh2', 'perl' packages of Photon OS have been released...

Debian dsa-6365 : libssh2-1-dev - security update

The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6365 advisory. - ------------------------------------------------------------------------- Debian Security Advisory DSA-6365-1 [email protected] https://www.debian.org/securit...

libssh2-1-1.11.1-3.1 on GA media (moderate)

libssh2-1-1.11.1-3.1 on GA media Announcement ID: openSUSE-SU-2026:11109-1 Rating: moderate Cross-References: CVE-2025-15661 CVE-2026-55199 CVE-2026-55200 CVE-2026-7598 CVSS scores: CVE-2025-15661 SUSE : 6.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:H CVE-2026-55199 SUSE : 5.9...

Moderate: Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

An update for Red Hat Hardened Images RPMs is now available. This update includes the following RPMs: libssh2: libssh2-1.11.1-9.hum1 aarch64, x8664 libssh2-devel-1.11.1-9.hum1 aarch64, x8664 libssh2-docs-1.11.1-9.hum1 noarch libssh2-1.11.1-9.hum1.src src...